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swarm: integrate OpenTracing; propagate ctx to internal APIs (#17169)

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* swarm: propagate ctx, enable opentracing

* swarm/tracing: log error when tracing is misconfigured
This commit is contained in:
Anton Evangelatov 2018-07-13 17:40:28 +02:00 committed by Balint Gabor
parent f7d3678c28
commit 7c9314f231
170 changed files with 21762 additions and 249 deletions
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3
cmd/swarm/main.go
View File

@ -43,6 +43,7 @@ import (
"github.com/ethereum/go-ethereum/swarm"
bzzapi "github.com/ethereum/go-ethereum/swarm/api"
swarmmetrics "github.com/ethereum/go-ethereum/swarm/metrics"
"github.com/ethereum/go-ethereum/swarm/tracing"
"gopkg.in/urfave/cli.v1"
)
@ -430,12 +431,14 @@ pv(1) tool to get a progress bar:
app.Flags = append(app.Flags, rpcFlags...)
app.Flags = append(app.Flags, debug.Flags...)
app.Flags = append(app.Flags, swarmmetrics.Flags...)
app.Flags = append(app.Flags, tracing.Flags...)
app.Before = func(ctx *cli.Context) error {
runtime.GOMAXPROCS(runtime.NumCPU())
if err := debug.Setup(ctx, ""); err != nil {
return err
}
swarmmetrics.Setup(ctx)
tracing.Setup(ctx)
return nil
}
app.After = func(ctx *cli.Context) error {

5
cmd/swarm/swarm-smoke/upload_and_sync.go
View File

@ -77,8 +77,9 @@ func cliUploadAndSync(c *cli.Context) error {
log.Info("uploaded successfully", "hash", hash, "digest", fmt.Sprintf("%x", fhash))
if filesize < 10 {
time.Sleep(15 * time.Second)
time.Sleep(35 * time.Second)
} else {
time.Sleep(15 * time.Second)
time.Sleep(2 * time.Duration(filesize) * time.Second)
}
@ -108,7 +109,7 @@ func cliUploadAndSync(c *cli.Context) error {
// fetch is getting the requested `hash` from the `endpoint` and compares it with the `original` file
func fetch(hash string, endpoint string, original []byte, ruid string) error {
log.Trace("sleeping", "ruid", ruid)
time.Sleep(1 * time.Second)
time.Sleep(5 * time.Second)
log.Trace("http get request", "ruid", ruid, "api", endpoint, "hash", hash)
res, err := http.Get(endpoint + "/bzz:/" + hash + "/")

89
p2p/protocols/protocol.go
View File

@ -29,6 +29,8 @@ devp2p subprotocols by abstracting away code standardly shared by protocols.
package protocols
import (
"bufio"
"bytes"
"context"
"fmt"
"io"
@ -39,6 +41,10 @@ import (
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/swarm/spancontext"
"github.com/ethereum/go-ethereum/swarm/tracing"
opentracing "github.com/opentracing/opentracing-go"
)
// error codes used by this protocol scheme
@ -109,6 +115,13 @@ func errorf(code int, format string, params ...interface{}) *Error {
}
}
// WrappedMsg is used to propagate marshalled context alongside message payloads
type WrappedMsg struct {
Context []byte
Size uint32
Payload []byte
}
// Spec is a protocol specification including its name and version as well as
// the types of messages which are exchanged
type Spec struct {
@ -201,7 +214,7 @@ func NewPeer(p *p2p.Peer, rw p2p.MsgReadWriter, spec *Spec) *Peer {
// the handler argument is a function which is called for each message received
// from the remote peer, a returned error causes the loop to exit
// resulting in disconnection
func (p *Peer) Run(handler func(msg interface{}) error) error {
func (p *Peer) Run(handler func(ctx context.Context, msg interface{}) error) error {
for {
if err := p.handleIncoming(handler); err != nil {
if err != io.EOF {
@ -225,14 +238,47 @@ func (p *Peer) Drop(err error) {
// message off to the peer
// this low level call will be wrapped by libraries providing routed or broadcast sends
// but often just used to forward and push messages to directly connected peers
func (p *Peer) Send(msg interface{}) error {
func (p *Peer) Send(ctx context.Context, msg interface{}) error {
defer metrics.GetOrRegisterResettingTimer("peer.send_t", nil).UpdateSince(time.Now())
metrics.GetOrRegisterCounter("peer.send", nil).Inc(1)
var b bytes.Buffer
if tracing.Enabled {
writer := bufio.NewWriter(&b)
tracer := opentracing.GlobalTracer()
sctx := spancontext.FromContext(ctx)
if sctx != nil {
err := tracer.Inject(
sctx,
opentracing.Binary,
writer)
if err != nil {
return err
}
}
writer.Flush()
}
r, err := rlp.EncodeToBytes(msg)
if err != nil {
return err
}
wmsg := WrappedMsg{
Context: b.Bytes(),
Size: uint32(len(r)),
Payload: r,
}
code, found := p.spec.GetCode(msg)
if !found {
return errorf(ErrInvalidMsgType, "%v", code)
}
return p2p.Send(p.rw, code, msg)
return p2p.Send(p.rw, code, wmsg)
}
// handleIncoming(code)
@ -243,7 +289,7 @@ func (p *Peer) Send(msg interface{}) error {
// * checks for out-of-range message codes,
// * handles decoding with reflection,
// * call handlers as callbacks
func (p *Peer) handleIncoming(handle func(msg interface{}) error) error {
func (p *Peer) handleIncoming(handle func(ctx context.Context, msg interface{}) error) error {
msg, err := p.rw.ReadMsg()
if err != nil {
return err
@ -255,11 +301,38 @@ func (p *Peer) handleIncoming(handle func(msg interface{}) error) error {
return errorf(ErrMsgTooLong, "%v > %v", msg.Size, p.spec.MaxMsgSize)
}
// unmarshal wrapped msg, which might contain context
var wmsg WrappedMsg
err = msg.Decode(&wmsg)
if err != nil {
log.Error(err.Error())
return err
}
ctx := context.Background()
// if tracing is enabled and the context coming within the request is
// not empty, try to unmarshal it
if tracing.Enabled && len(wmsg.Context) > 0 {
var sctx opentracing.SpanContext
tracer := opentracing.GlobalTracer()
sctx, err = tracer.Extract(
opentracing.Binary,
bytes.NewReader(wmsg.Context))
if err != nil {
log.Error(err.Error())
return err
}
ctx = spancontext.WithContext(ctx, sctx)
}
val, ok := p.spec.NewMsg(msg.Code)
if !ok {
return errorf(ErrInvalidMsgCode, "%v", msg.Code)
}
if err := msg.Decode(val); err != nil {
if err := rlp.DecodeBytes(wmsg.Payload, val); err != nil {
return errorf(ErrDecode, "<= %v: %v", msg, err)
}
@ -268,7 +341,7 @@ func (p *Peer) handleIncoming(handle func(msg interface{}) error) error {
// which the handler is supposed to cast to the appropriate type
// it is entirely safe not to check the cast in the handler since the handler is
// chosen based on the proper type in the first place
if err := handle(val); err != nil {
if err := handle(ctx, val); err != nil {
return errorf(ErrHandler, "(msg code %v): %v", msg.Code, err)
}
return nil
@ -288,14 +361,14 @@ func (p *Peer) Handshake(ctx context.Context, hs interface{}, verify func(interf
return nil, errorf(ErrHandshake, "unknown handshake message type: %T", hs)
}
errc := make(chan error, 2)
handle := func(msg interface{}) error {
handle := func(ctx context.Context, msg interface{}) error {
rhs = msg
if verify != nil {
return verify(rhs)
}
return nil
}
send := func() { errc <- p.Send(hs) }
send := func() { errc <- p.Send(ctx, hs) }
receive := func() { errc <- p.handleIncoming(handle) }
go func() {

4
p2p/protocols/protocol_test.go
View File

@ -104,7 +104,7 @@ func newProtocol(pp *p2ptest.TestPeerPool) func(*p2p.Peer, p2p.MsgReadWriter) er
return fmt.Errorf("handshake mismatch remote %v > local %v", rmhs.C, lhs.C)
}
handle := func(msg interface{}) error {
handle := func(ctx context.Context, msg interface{}) error {
switch msg := msg.(type) {
case *protoHandshake:
@ -116,7 +116,7 @@ func newProtocol(pp *p2ptest.TestPeerPool) func(*p2p.Peer, p2p.MsgReadWriter) er
return fmt.Errorf("handshake mismatch remote %v > local %v", rhs.C, lhs.C)
}
lhs.C += rhs.C
return peer.Send(lhs)
return peer.Send(ctx, lhs)
case *kill:
// demonstrates use of peerPool, killing another peer connection as a response to a message

21
p2p/testing/protocoltester.go
View File

@ -180,7 +180,8 @@ func (m *mockNode) Run(peer *p2p.Peer, rw p2p.MsgReadWriter) error {
for {
select {
case trig := <-m.trigger:
m.err <- p2p.Send(rw, trig.Code, trig.Msg)
wmsg := Wrap(trig.Msg)
m.err <- p2p.Send(rw, trig.Code, wmsg)
case exps := <-m.expect:
m.err <- expectMsgs(rw, exps)
case <-m.stop:
@ -220,7 +221,7 @@ func expectMsgs(rw p2p.MsgReadWriter, exps []Expect) error {
}
var found bool
for i, exp := range exps {
if exp.Code == msg.Code && bytes.Equal(actualContent, mustEncodeMsg(exp.Msg)) {
if exp.Code == msg.Code && bytes.Equal(actualContent, mustEncodeMsg(Wrap(exp.Msg))) {
if matched[i] {
return fmt.Errorf("message #%d received two times", i)
}
@ -235,7 +236,7 @@ func expectMsgs(rw p2p.MsgReadWriter, exps []Expect) error {
if matched[i] {
continue
}
expected = append(expected, fmt.Sprintf("code %d payload %x", exp.Code, mustEncodeMsg(exp.Msg)))
expected = append(expected, fmt.Sprintf("code %d payload %x", exp.Code, mustEncodeMsg(Wrap(exp.Msg))))
}
return fmt.Errorf("unexpected message code %d payload %x, expected %s", msg.Code, actualContent, strings.Join(expected, " or "))
}
@ -267,3 +268,17 @@ func mustEncodeMsg(msg interface{}) []byte {
}
return contentEnc
}
type WrappedMsg struct {
Context []byte
Size uint32
Payload []byte
}
func Wrap(msg interface{}) interface{} {
data, _ := rlp.EncodeToBytes(msg)
return &WrappedMsg{
Size: uint32(len(data)),
Payload: data,
}
}

14
swarm/api/api.go
View File

@ -37,8 +37,10 @@ import (
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/multihash"
"github.com/ethereum/go-ethereum/swarm/spancontext"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
opentracing "github.com/opentracing/opentracing-go"
)
var (
@ -263,6 +265,12 @@ func (a *API) Resolve(ctx context.Context, uri *URI) (storage.Address, error) {
apiResolveCount.Inc(1)
log.Trace("resolving", "uri", uri.Addr)
var sp opentracing.Span
ctx, sp = spancontext.StartSpan(
ctx,
"api.resolve")
defer sp.Finish()
// if the URI is immutable, check if the address looks like a hash
if uri.Immutable() {
key := uri.Address()
@ -347,7 +355,7 @@ func (a *API) Get(ctx context.Context, manifestAddr storage.Address, path string
log.Trace("resource type", "key", manifestAddr, "hash", entry.Hash)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
rsrc, err := a.resource.Load(storage.Address(common.FromHex(entry.Hash)))
rsrc, err := a.resource.Load(ctx, storage.Address(common.FromHex(entry.Hash)))
if err != nil {
apiGetNotFound.Inc(1)
status = http.StatusNotFound
@ -486,7 +494,7 @@ func (a *API) GetDirectoryTar(ctx context.Context, uri *URI) (io.ReadCloser, err
// retrieve the entry's key and size
reader, _ := a.Retrieve(ctx, storage.Address(common.Hex2Bytes(entry.Hash)))
size, err := reader.Size(nil)
size, err := reader.Size(ctx, nil)
if err != nil {
return err
}
@ -883,7 +891,7 @@ func (a *API) BuildDirectoryTree(ctx context.Context, mhash string, nameresolver
// ResourceLookup Looks up mutable resource updates at specific periods and versions
func (a *API) ResourceLookup(ctx context.Context, addr storage.Address, period uint32, version uint32, maxLookup *mru.LookupParams) (string, []byte, error) {
var err error
rsrc, err := a.resource.Load(addr)
rsrc, err := a.resource.Load(ctx, addr)
if err != nil {
return "", nil, err
}

2
swarm/api/api_test.go
View File

@ -90,7 +90,7 @@ func testGet(t *testing.T, api *API, bzzhash, path string) *testResponse {
t.Fatalf("unexpected error: %v", err)
}
quitC := make(chan bool)
size, err := reader.Size(quitC)
size, err := reader.Size(context.TODO(), quitC)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}

2
swarm/api/filesystem.go
View File

@ -277,7 +277,7 @@ func retrieveToFile(quitC chan bool, fileStore *storage.FileStore, addr storage.
}
reader, _ := fileStore.Retrieve(context.TODO(), addr)
writer := bufio.NewWriter(f)
size, err := reader.Size(quitC)
size, err := reader.Size(context.TODO(), quitC)
if err != nil {
return err
}

113
swarm/api/http/server.go
View File

@ -42,8 +42,11 @@ import (
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/swarm/api"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/spancontext"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
opentracing "github.com/opentracing/opentracing-go"
"github.com/pborman/uuid"
"github.com/rs/cors"
)
@ -263,6 +266,13 @@ func (s *Server) HandlePostRaw(w http.ResponseWriter, r *Request) {
postRawCount.Inc(1)
ctx := r.Context()
var sp opentracing.Span
ctx, sp = spancontext.StartSpan(
ctx,
"http.post.raw")
defer sp.Finish()
toEncrypt := false
if r.uri.Addr == "encrypt" {
toEncrypt = true
@ -286,7 +296,7 @@ func (s *Server) HandlePostRaw(w http.ResponseWriter, r *Request) {
return
}
addr, _, err := s.api.Store(r.Context(), r.Body, r.ContentLength, toEncrypt)
addr, _, err := s.api.Store(ctx, r.Body, r.ContentLength, toEncrypt)
if err != nil {
postRawFail.Inc(1)
Respond(w, r, err.Error(), http.StatusInternalServerError)
@ -307,8 +317,15 @@ func (s *Server) HandlePostRaw(w http.ResponseWriter, r *Request) {
// resulting manifest hash as a text/plain response
func (s *Server) HandlePostFiles(w http.ResponseWriter, r *Request) {
log.Debug("handle.post.files", "ruid", r.ruid)
postFilesCount.Inc(1)
var sp opentracing.Span
ctx := r.Context()
ctx, sp = spancontext.StartSpan(
ctx,
"http.post.files")
defer sp.Finish()
contentType, params, err := mime.ParseMediaType(r.Header.Get("Content-Type"))
if err != nil {
postFilesFail.Inc(1)
@ -323,7 +340,7 @@ func (s *Server) HandlePostFiles(w http.ResponseWriter, r *Request) {
var addr storage.Address
if r.uri.Addr != "" && r.uri.Addr != "encrypt" {
addr, err = s.api.Resolve(r.Context(), r.uri)
addr, err = s.api.Resolve(ctx, r.uri)
if err != nil {
postFilesFail.Inc(1)
Respond(w, r, fmt.Sprintf("cannot resolve %s: %s", r.uri.Addr, err), http.StatusInternalServerError)
@ -331,7 +348,7 @@ func (s *Server) HandlePostFiles(w http.ResponseWriter, r *Request) {
}
log.Debug("resolved key", "ruid", r.ruid, "key", addr)
} else {
addr, err = s.api.NewManifest(r.Context(), toEncrypt)
addr, err = s.api.NewManifest(ctx, toEncrypt)
if err != nil {
postFilesFail.Inc(1)
Respond(w, r, err.Error(), http.StatusInternalServerError)
@ -340,7 +357,7 @@ func (s *Server) HandlePostFiles(w http.ResponseWriter, r *Request) {
log.Debug("new manifest", "ruid", r.ruid, "key", addr)
}
newAddr, err := s.api.UpdateManifest(r.Context(), addr, func(mw *api.ManifestWriter) error {
newAddr, err := s.api.UpdateManifest(ctx, addr, func(mw *api.ManifestWriter) error {
switch contentType {
case "application/x-tar":
@ -509,6 +526,14 @@ func resourcePostMode(path string) (isRaw bool, frequency uint64, err error) {
// and name "foo.eth" will be created
func (s *Server) HandlePostResource(w http.ResponseWriter, r *Request) {
log.Debug("handle.post.resource", "ruid", r.ruid)
var sp opentracing.Span
ctx := r.Context()
ctx, sp = spancontext.StartSpan(
ctx,
"http.post.resource")
defer sp.Finish()
var err error
var addr storage.Address
var name string
@ -525,7 +550,7 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *Request) {
name = r.uri.Addr
// the key is the content addressed root chunk holding mutable resource metadata information
addr, err = s.api.ResourceCreate(r.Context(), name, frequency)
addr, err = s.api.ResourceCreate(ctx, name, frequency)
if err != nil {
code, err2 := s.translateResourceError(w, r, "resource creation fail", err)
@ -536,7 +561,7 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *Request) {
// we create a manifest so we can retrieve the resource with bzz:// later
// this manifest has a special "resource type" manifest, and its hash is the key of the mutable resource
// root chunk
m, err := s.api.NewResourceManifest(r.Context(), addr.Hex())
m, err := s.api.NewResourceManifest(ctx, addr.Hex())
if err != nil {
Respond(w, r, fmt.Sprintf("failed to create resource manifest: %v", err), http.StatusInternalServerError)
return
@ -556,7 +581,7 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *Request) {
// that means that we retrieve the manifest and inspect its Hash member.
manifestAddr := r.uri.Address()
if manifestAddr == nil {
manifestAddr, err = s.api.Resolve(r.Context(), r.uri)
manifestAddr, err = s.api.Resolve(ctx, r.uri)
if err != nil {
getFail.Inc(1)
Respond(w, r, fmt.Sprintf("cannot resolve %s: %s", r.uri.Addr, err), http.StatusNotFound)
@ -567,7 +592,7 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *Request) {
}
// get the root chunk key from the manifest
addr, err = s.api.ResolveResourceManifest(r.Context(), manifestAddr)
addr, err = s.api.ResolveResourceManifest(ctx, manifestAddr)
if err != nil {
getFail.Inc(1)
Respond(w, r, fmt.Sprintf("error resolving resource root chunk for %s: %s", r.uri.Addr, err), http.StatusNotFound)
@ -576,7 +601,7 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *Request) {
log.Debug("handle.post.resource: resolved", "ruid", r.ruid, "manifestkey", manifestAddr, "rootchunkkey", addr)
name, _, err = s.api.ResourceLookup(r.Context(), addr, 0, 0, &mru.LookupParams{})
name, _, err = s.api.ResourceLookup(ctx, addr, 0, 0, &mru.LookupParams{})
if err != nil {
Respond(w, r, err.Error(), http.StatusNotFound)
return
@ -592,7 +617,7 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *Request) {
// Multihash will be passed as hex-encoded data, so we need to parse this to bytes
if isRaw {
_, _, _, err = s.api.ResourceUpdate(r.Context(), name, data)
_, _, _, err = s.api.ResourceUpdate(ctx, name, data)
if err != nil {
Respond(w, r, err.Error(), http.StatusBadRequest)
return
@ -603,7 +628,7 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *Request) {
Respond(w, r, err.Error(), http.StatusBadRequest)
return
}
_, _, _, err = s.api.ResourceUpdateMultihash(r.Context(), name, bytesdata)
_, _, _, err = s.api.ResourceUpdateMultihash(ctx, name, bytesdata)
if err != nil {
Respond(w, r, err.Error(), http.StatusBadRequest)
return
@ -730,10 +755,18 @@ func (s *Server) translateResourceError(w http.ResponseWriter, r *Request, supEr
func (s *Server) HandleGet(w http.ResponseWriter, r *Request) {
log.Debug("handle.get", "ruid", r.ruid, "uri", r.uri)
getCount.Inc(1)
var sp opentracing.Span
ctx := r.Context()
ctx, sp = spancontext.StartSpan(
ctx,
"http.get")
defer sp.Finish()
var err error
addr := r.uri.Address()
if addr == nil {
addr, err = s.api.Resolve(r.Context(), r.uri)
addr, err = s.api.Resolve(ctx, r.uri)
if err != nil {
getFail.Inc(1)
Respond(w, r, fmt.Sprintf("cannot resolve %s: %s", r.uri.Addr, err), http.StatusNotFound)
@ -748,7 +781,7 @@ func (s *Server) HandleGet(w http.ResponseWriter, r *Request) {
// if path is set, interpret <key> as a manifest and return the
// raw entry at the given path
if r.uri.Path != "" {
walker, err := s.api.NewManifestWalker(r.Context(), addr, nil)
walker, err := s.api.NewManifestWalker(ctx, addr, nil)
if err != nil {
getFail.Inc(1)
Respond(w, r, fmt.Sprintf("%s is not a manifest", addr), http.StatusBadRequest)
@ -796,8 +829,8 @@ func (s *Server) HandleGet(w http.ResponseWriter, r *Request) {
}
// check the root chunk exists by retrieving the file's size
reader, isEncrypted := s.api.Retrieve(r.Context(), addr)
if _, err := reader.Size(nil); err != nil {
reader, isEncrypted := s.api.Retrieve(ctx, addr)
if _, err := reader.Size(ctx, nil); err != nil {
getFail.Inc(1)
Respond(w, r, fmt.Sprintf("root chunk not found %s: %s", addr, err), http.StatusNotFound)
return
@ -828,13 +861,21 @@ func (s *Server) HandleGet(w http.ResponseWriter, r *Request) {
func (s *Server) HandleGetList(w http.ResponseWriter, r *Request) {
log.Debug("handle.get.list", "ruid", r.ruid, "uri", r.uri)
getListCount.Inc(1)
var sp opentracing.Span
ctx := r.Context()
ctx, sp = spancontext.StartSpan(
ctx,
"http.get.list")
defer sp.Finish()
// ensure the root path has a trailing slash so that relative URLs work
if r.uri.Path == "" && !strings.HasSuffix(r.URL.Path, "/") {
http.Redirect(w, &r.Request, r.URL.Path+"/", http.StatusMovedPermanently)
return
}
addr, err := s.api.Resolve(r.Context(), r.uri)
addr, err := s.api.Resolve(ctx, r.uri)
if err != nil {
getListFail.Inc(1)
Respond(w, r, fmt.Sprintf("cannot resolve %s: %s", r.uri.Addr, err), http.StatusNotFound)
@ -842,7 +883,7 @@ func (s *Server) HandleGetList(w http.ResponseWriter, r *Request) {
}
log.Debug("handle.get.list: resolved", "ruid", r.ruid, "key", addr)
list, err := s.api.GetManifestList(r.Context(), addr, r.uri.Path)
list, err := s.api.GetManifestList(ctx, addr, r.uri.Path)
if err != nil {
getListFail.Inc(1)
Respond(w, r, err.Error(), http.StatusInternalServerError)
@ -877,19 +918,28 @@ func (s *Server) HandleGetList(w http.ResponseWriter, r *Request) {
func (s *Server) HandleGetFile(w http.ResponseWriter, r *Request) {
log.Debug("handle.get.file", "ruid", r.ruid)
getFileCount.Inc(1)
var sp opentracing.Span
ctx := r.Context()
ctx, sp = spancontext.StartSpan(
ctx,
"http.get.file")
// ensure the root path has a trailing slash so that relative URLs work
if r.uri.Path == "" && !strings.HasSuffix(r.URL.Path, "/") {
http.Redirect(w, &r.Request, r.URL.Path+"/", http.StatusMovedPermanently)
sp.Finish()
return
}
var err error
manifestAddr := r.uri.Address()
if manifestAddr == nil {
manifestAddr, err = s.api.Resolve(r.Context(), r.uri)
manifestAddr, err = s.api.Resolve(ctx, r.uri)
if err != nil {
getFileFail.Inc(1)
Respond(w, r, fmt.Sprintf("cannot resolve %s: %s", r.uri.Addr, err), http.StatusNotFound)
sp.Finish()
return
}
} else {
@ -897,7 +947,8 @@ func (s *Server) HandleGetFile(w http.ResponseWriter, r *Request) {
}
log.Debug("handle.get.file: resolved", "ruid", r.ruid, "key", manifestAddr)
reader, contentType, status, contentKey, err := s.api.Get(r.Context(), manifestAddr, r.uri.Path)
reader, contentType, status, contentKey, err := s.api.Get(ctx, manifestAddr, r.uri.Path)
etag := common.Bytes2Hex(contentKey)
noneMatchEtag := r.Header.Get("If-None-Match")
@ -905,6 +956,7 @@ func (s *Server) HandleGetFile(w http.ResponseWriter, r *Request) {
if noneMatchEtag != "" {
if bytes.Equal(storage.Address(common.Hex2Bytes(noneMatchEtag)), contentKey) {
Respond(w, r, "Not Modified", http.StatusNotModified)
sp.Finish()
return
}
}
@ -918,34 +970,49 @@ func (s *Server) HandleGetFile(w http.ResponseWriter, r *Request) {
getFileFail.Inc(1)
Respond(w, r, err.Error(), http.StatusInternalServerError)
}
sp.Finish()
return
}
//the request results in ambiguous files
//e.g. /read with readme.md and readinglist.txt available in manifest
if status == http.StatusMultipleChoices {
list, err := s.api.GetManifestList(r.Context(), manifestAddr, r.uri.Path)
list, err := s.api.GetManifestList(ctx, manifestAddr, r.uri.Path)
if err != nil {
getFileFail.Inc(1)
Respond(w, r, err.Error(), http.StatusInternalServerError)
sp.Finish()
return
}
log.Debug(fmt.Sprintf("Multiple choices! --> %v", list), "ruid", r.ruid)
//show a nice page links to available entries
ShowMultipleChoices(w, r, list)
sp.Finish()
return
}
// check the root chunk exists by retrieving the file's size
if _, err := reader.Size(nil); err != nil {
if _, err := reader.Size(ctx, nil); err != nil {
getFileNotFound.Inc(1)
Respond(w, r, fmt.Sprintf("file not found %s: %s", r.uri, err), http.StatusNotFound)
sp.Finish()
return
}
buf, err := ioutil.ReadAll(newBufferedReadSeeker(reader, getFileBufferSize))
if err != nil {
getFileNotFound.Inc(1)
Respond(w, r, fmt.Sprintf("file not found %s: %s", r.uri, err), http.StatusNotFound)
sp.Finish()
return
}
log.Debug("got response in buffer", "len", len(buf), "ruid", r.ruid)
sp.Finish()
w.Header().Set("Content-Type", contentType)
http.ServeContent(w, &r.Request, "", time.Now(), newBufferedReadSeeker(reader, getFileBufferSize))
http.ServeContent(w, &r.Request, "", time.Now(), bytes.NewReader(buf))
}
// The size of buffer used for bufio.Reader on LazyChunkReader passed to

6
swarm/api/manifest.go
View File

@ -212,10 +212,10 @@ func loadManifest(ctx context.Context, fileStore *storage.FileStore, hash storag
return readManifest(manifestReader, hash, fileStore, isEncrypted, quitC)
}
func readManifest(manifestReader storage.LazySectionReader, hash storage.Address, fileStore *storage.FileStore, isEncrypted bool, quitC chan bool) (trie *manifestTrie, err error) { // non-recursive, subtrees are downloaded on-demand
func readManifest(mr storage.LazySectionReader, hash storage.Address, fileStore *storage.FileStore, isEncrypted bool, quitC chan bool) (trie *manifestTrie, err error) { // non-recursive, subtrees are downloaded on-demand
// TODO check size for oversized manifests
size, err := manifestReader.Size(quitC)
size, err := mr.Size(mr.Context(), quitC)
if err != nil { // size == 0
// can't determine size means we don't have the root chunk
log.Trace("manifest not found", "key", hash)
@ -228,7 +228,7 @@ func readManifest(manifestReader storage.LazySectionReader, hash storage.Address
return
}
manifestData := make([]byte, size)
read, err := manifestReader.Read(manifestData)
read, err := mr.Read(manifestData)
if int64(read) < size {
log.Trace("manifest not found", "key", hash)
if err == nil {

2
swarm/api/storage.go
View File

@ -72,7 +72,7 @@ func (s *Storage) Get(ctx context.Context, bzzpath string) (*Response, error) {
return nil, err
}
quitC := make(chan bool)
expsize, err := reader.Size(quitC)
expsize, err := reader.Size(ctx, quitC)
if err != nil {
return nil, err
}

2
swarm/fuse/fuse_file.go
View File

@ -86,7 +86,7 @@ func (sf *SwarmFile) Attr(ctx context.Context, a *fuse.Attr) error {
if sf.fileSize == -1 {
reader, _ := sf.mountInfo.swarmApi.Retrieve(ctx, sf.addr)
quitC := make(chan bool)
size, err := reader.Size(quitC)
size, err := reader.Size(ctx, quitC)
if err != nil {
log.Error("Couldnt get size of file %s : %v", sf.path, err)
return err

9
swarm/network/discovery.go
View File

@ -17,6 +17,7 @@
package network
import (
"context"
"fmt"
"sync"
@ -48,7 +49,7 @@ func newDiscovery(p *BzzPeer, o Overlay) *discPeer {
}
// HandleMsg is the message handler that delegates incoming messages
func (d *discPeer) HandleMsg(msg interface{}) error {
func (d *discPeer) HandleMsg(ctx context.Context, msg interface{}) error {
switch msg := msg.(type) {
case *peersMsg:
@ -99,14 +100,14 @@ func (d *discPeer) NotifyPeer(a OverlayAddr, po uint8) {
resp := &peersMsg{
Peers: []*BzzAddr{ToAddr(a)},
}
go d.Send(resp)
go d.Send(context.TODO(), resp)
}
// NotifyDepth sends a subPeers Msg to the receiver notifying them about
// a change in the depth of saturation
func (d *discPeer) NotifyDepth(po uint8) {
// log.Trace(fmt.Sprintf("%08x peer %08x notified of new depth %v", d.localAddr.Over()[:4], d.Address()[:4], po))
go d.Send(&subPeersMsg{Depth: po})
go d.Send(context.TODO(), &subPeersMsg{Depth: po})
}
/*
@ -178,7 +179,7 @@ func (d *discPeer) handleSubPeersMsg(msg *subPeersMsg) error {
})
if len(peers) > 0 {
// log.Debug(fmt.Sprintf("%08x: %v peers sent to %v", d.overlay.BaseAddr(), len(peers), d))
go d.Send(&peersMsg{Peers: peers})
go d.Send(context.TODO(), &peersMsg{Peers: peers})
}
}
d.sentPeers = true

4
swarm/network/protocol.go
View File

@ -82,9 +82,9 @@ type Peer interface {
type Conn interface {
ID() discover.NodeID // the key that uniquely identifies the Node for the peerPool
Handshake(context.Context, interface{}, func(interface{}) error) (interface{}, error) // can send messages
Send(interface{}) error // can send messages
Send(context.Context, interface{}) error // can send messages
Drop(error) // disconnect this peer
Run(func(interface{}) error) error // the run function to run a protocol
Run(func(context.Context, interface{}) error) error // the run function to run a protocol
Off() OverlayAddr
}

14
swarm/network/stream/common_test.go
View File

@ -126,7 +126,7 @@ func NewStreamerService(ctx *adapters.ServiceContext) (node.Service, error) {
return testRegistry, nil
}
func defaultRetrieveFunc(id discover.NodeID) func(chunk *storage.Chunk) error {
func defaultRetrieveFunc(id discover.NodeID) func(ctx context.Context, chunk *storage.Chunk) error {
return nil
}
@ -217,14 +217,14 @@ func newRoundRobinStore(stores ...storage.ChunkStore) *roundRobinStore {
}
}
func (rrs *roundRobinStore) Get(addr storage.Address) (*storage.Chunk, error) {
func (rrs *roundRobinStore) Get(ctx context.Context, addr storage.Address) (*storage.Chunk, error) {
return nil, errors.New("get not well defined on round robin store")
}
func (rrs *roundRobinStore) Put(chunk *storage.Chunk) {
func (rrs *roundRobinStore) Put(ctx context.Context, chunk *storage.Chunk) {
i := atomic.AddUint32(&rrs.index, 1)
idx := int(i) % len(rrs.stores)
rrs.stores[idx].Put(chunk)
rrs.stores[idx].Put(ctx, chunk)
}
func (rrs *roundRobinStore) Close() {
@ -369,8 +369,8 @@ func newTestExternalClient(db *storage.DBAPI) *testExternalClient {
}
}
func (c *testExternalClient) NeedData(hash []byte) func() {
chunk, _ := c.db.GetOrCreateRequest(hash)
func (c *testExternalClient) NeedData(ctx context.Context, hash []byte) func() {
chunk, _ := c.db.GetOrCreateRequest(ctx, hash)
if chunk.ReqC == nil {
return nil
}
@ -429,7 +429,7 @@ func (s *testExternalServer) SetNextBatch(from uint64, to uint64) ([]byte, uint6
return b, from, to, nil, nil
}
func (s *testExternalServer) GetData([]byte) ([]byte, error) {
func (s *testExternalServer) GetData(context.Context, []byte) ([]byte, error) {
return make([]byte, 4096), nil
}

47
swarm/network/stream/delivery.go
View File

@ -17,6 +17,7 @@
package stream
import (
"context"
"errors"
"time"
@ -25,7 +26,9 @@ import (
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/network"
"github.com/ethereum/go-ethereum/swarm/spancontext"
"github.com/ethereum/go-ethereum/swarm/storage"
opentracing "github.com/opentracing/opentracing-go"
)
const (
@ -118,8 +121,8 @@ func (s *SwarmChunkServer) Close() {
}
// GetData retrives chunk data from db store
func (s *SwarmChunkServer) GetData(key []byte) ([]byte, error) {
chunk, err := s.db.Get(storage.Address(key))
func (s *SwarmChunkServer) GetData(ctx context.Context, key []byte) ([]byte, error) {
chunk, err := s.db.Get(ctx, storage.Address(key))
if err == storage.ErrFetching {
<-chunk.ReqC
} else if err != nil {
@ -134,25 +137,37 @@ type RetrieveRequestMsg struct {
SkipCheck bool
}
func (d *Delivery) handleRetrieveRequestMsg(sp *Peer, req *RetrieveRequestMsg) error {
func (d *Delivery) handleRetrieveRequestMsg(ctx context.Context, sp *Peer, req *RetrieveRequestMsg) error {
log.Trace("received request", "peer", sp.ID(), "hash", req.Addr)
handleRetrieveRequestMsgCount.Inc(1)
var osp opentracing.Span
ctx, osp = spancontext.StartSpan(
ctx,
"retrieve.request")
defer osp.Finish()
s, err := sp.getServer(NewStream(swarmChunkServerStreamName, "", false))
if err != nil {
return err
}
streamer := s.Server.(*SwarmChunkServer)
chunk, created := d.db.GetOrCreateRequest(req.Addr)
chunk, created := d.db.GetOrCreateRequest(ctx, req.Addr)
if chunk.ReqC != nil {
if created {
if err := d.RequestFromPeers(chunk.Addr[:], true, sp.ID()); err != nil {
if err := d.RequestFromPeers(ctx, chunk.Addr[:], true, sp.ID()); err != nil {
log.Warn("unable to forward chunk request", "peer", sp.ID(), "key", chunk.Addr, "err", err)
chunk.SetErrored(storage.ErrChunkForward)
return nil
}
}
go func() {
var osp opentracing.Span
ctx, osp = spancontext.StartSpan(
ctx,
"waiting.delivery")
defer osp.Finish()
t := time.NewTimer(10 * time.Minute)
defer t.Stop()
@ -169,7 +184,7 @@ func (d *Delivery) handleRetrieveRequestMsg(sp *Peer, req *RetrieveRequestMsg) e
chunk.SetErrored(nil)
if req.SkipCheck {
err := sp.Deliver(chunk, s.priority)
err := sp.Deliver(ctx, chunk, s.priority)
if err != nil {
log.Warn("ERROR in handleRetrieveRequestMsg, DROPPING peer!", "err", err)
sp.Drop(err)
@ -185,7 +200,7 @@ func (d *Delivery) handleRetrieveRequestMsg(sp *Peer, req *RetrieveRequestMsg) e
if length := len(chunk.SData); length < 9 {
log.Error("Chunk.SData to deliver is too short", "len(chunk.SData)", length, "address", chunk.Addr)
}
return sp.Deliver(chunk, s.priority)
return sp.Deliver(ctx, chunk, s.priority)
}
streamer.deliveryC <- chunk.Addr[:]
return nil
@ -197,7 +212,13 @@ type ChunkDeliveryMsg struct {
peer *Peer // set in handleChunkDeliveryMsg
}
func (d *Delivery) handleChunkDeliveryMsg(sp *Peer, req *ChunkDeliveryMsg) error {
func (d *Delivery) handleChunkDeliveryMsg(ctx context.Context, sp *Peer, req *ChunkDeliveryMsg) error {
var osp opentracing.Span
ctx, osp = spancontext.StartSpan(
ctx,
"chunk.delivery")
defer osp.Finish()
req.peer = sp
d.receiveC <- req
return nil
@ -209,7 +230,7 @@ R:
processReceivedChunksCount.Inc(1)
// this should be has locally
chunk, err := d.db.Get(req.Addr)
chunk, err := d.db.Get(context.TODO(), req.Addr)
if err == nil {
continue R
}
@ -224,7 +245,7 @@ R:
default:
}
chunk.SData = req.SData
d.db.Put(chunk)
d.db.Put(context.TODO(), chunk)
go func(req *ChunkDeliveryMsg) {
err := chunk.WaitToStore()
@ -236,10 +257,11 @@ R:
}
// RequestFromPeers sends a chunk retrieve request to
func (d *Delivery) RequestFromPeers(hash []byte, skipCheck bool, peersToSkip ...discover.NodeID) error {
func (d *Delivery) RequestFromPeers(ctx context.Context, hash []byte, skipCheck bool, peersToSkip ...discover.NodeID) error {
var success bool
var err error
requestFromPeersCount.Inc(1)
d.overlay.EachConn(hash, 255, func(p network.OverlayConn, po int, nn bool) bool {
spId := p.(network.Peer).ID()
for _, p := range peersToSkip {
@ -253,8 +275,7 @@ func (d *Delivery) RequestFromPeers(hash []byte, skipCheck bool, peersToSkip ...
log.Warn("Delivery.RequestFromPeers: peer not found", "id", spId)
return true
}
// TODO: skip light nodes that do not accept retrieve requests
err = sp.SendPriority(&RetrieveRequestMsg{
err = sp.SendPriority(ctx, &RetrieveRequestMsg{
Addr: hash,
SkipCheck: skipCheck,
}, Top)

24
swarm/network/stream/delivery_test.go
View File

@ -46,7 +46,7 @@ func TestStreamerRetrieveRequest(t *testing.T) {
peerID := tester.IDs[0]
streamer.delivery.RequestFromPeers(hash0[:], true)
streamer.delivery.RequestFromPeers(context.TODO(), hash0[:], true)
err = tester.TestExchanges(p2ptest.Exchange{
Label: "RetrieveRequestMsg",
@ -80,7 +80,7 @@ func TestStreamerUpstreamRetrieveRequestMsgExchangeWithoutStore(t *testing.T) {
peer := streamer.getPeer(peerID)
peer.handleSubscribeMsg(&SubscribeMsg{
peer.handleSubscribeMsg(context.TODO(), &SubscribeMsg{
Stream: NewStream(swarmChunkServerStreamName, "", false),
History: nil,
Priority: Top,
@ -131,7 +131,7 @@ func TestStreamerUpstreamRetrieveRequestMsgExchange(t *testing.T) {
stream := NewStream(swarmChunkServerStreamName, "", false)
peer.handleSubscribeMsg(&SubscribeMsg{
peer.handleSubscribeMsg(context.TODO(), &SubscribeMsg{
Stream: stream,
History: nil,
Priority: Top,
@ -140,7 +140,7 @@ func TestStreamerUpstreamRetrieveRequestMsgExchange(t *testing.T) {
hash := storage.Address(hash0[:])
chunk := storage.NewChunk(hash, nil)
chunk.SData = hash
localStore.Put(chunk)
localStore.Put(context.TODO(), chunk)
chunk.WaitToStore()
err = tester.TestExchanges(p2ptest.Exchange{
@ -179,7 +179,7 @@ func TestStreamerUpstreamRetrieveRequestMsgExchange(t *testing.T) {
hash = storage.Address(hash1[:])
chunk = storage.NewChunk(hash, nil)
chunk.SData = hash1[:]
localStore.Put(chunk)
localStore.Put(context.TODO(), chunk)
chunk.WaitToStore()
err = tester.TestExchanges(p2ptest.Exchange{
@ -234,7 +234,7 @@ func TestStreamerDownstreamChunkDeliveryMsgExchange(t *testing.T) {
chunkKey := hash0[:]
chunkData := hash1[:]
chunk, created := localStore.GetOrCreateRequest(chunkKey)
chunk, created := localStore.GetOrCreateRequest(context.TODO(), chunkKey)
if !created {
t.Fatal("chunk already exists")
@ -285,7 +285,7 @@ func TestStreamerDownstreamChunkDeliveryMsgExchange(t *testing.T) {
case <-chunk.ReqC:
}
storedChunk, err := localStore.Get(chunkKey)
storedChunk, err := localStore.Get(context.TODO(), chunkKey)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
@ -401,8 +401,8 @@ func testDeliveryFromNodes(t *testing.T, nodes, conns, chunkCount int, skipCheck
}
// create a retriever FileStore for the pivot node
delivery := deliveries[sim.IDs[0]]
retrieveFunc := func(chunk *storage.Chunk) error {
return delivery.RequestFromPeers(chunk.Addr[:], skipCheck)
retrieveFunc := func(ctx context.Context, chunk *storage.Chunk) error {
return delivery.RequestFromPeers(ctx, chunk.Addr[:], skipCheck)
}
netStore := storage.NewNetStore(sim.Stores[0].(*storage.LocalStore), retrieveFunc)
fileStore := storage.NewFileStore(netStore, storage.NewFileStoreParams())
@ -617,8 +617,8 @@ func benchmarkDeliveryFromNodes(b *testing.B, nodes, conns, chunkCount int, skip
// create a retriever FileStore for the pivot node
// by now deliveries are set for each node by the streamer service
delivery := deliveries[sim.IDs[0]]
retrieveFunc := func(chunk *storage.Chunk) error {
return delivery.RequestFromPeers(chunk.Addr[:], skipCheck)
retrieveFunc := func(ctx context.Context, chunk *storage.Chunk) error {
return delivery.RequestFromPeers(ctx, chunk.Addr[:], skipCheck)
}
netStore := storage.NewNetStore(sim.Stores[0].(*storage.LocalStore), retrieveFunc)
@ -650,7 +650,7 @@ Loop:
errs := make(chan error)
for _, hash := range hashes {
go func(h storage.Address) {
_, err := netStore.Get(h)
_, err := netStore.Get(ctx, h)
log.Warn("test check netstore get", "hash", h, "err", err)
errs <- err
}(hash)

29
swarm/network/stream/messages.go
View File

@ -17,6 +17,7 @@
package stream
import (
"context"
"errors"
"fmt"
"sync"
@ -25,7 +26,9 @@ import (
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/swarm/log"
bv "github.com/ethereum/go-ethereum/swarm/network/bitvector"
"github.com/ethereum/go-ethereum/swarm/spancontext"
"github.com/ethereum/go-ethereum/swarm/storage"
opentracing "github.com/opentracing/opentracing-go"
)
// Stream defines a unique stream identifier.
@ -71,17 +74,17 @@ type RequestSubscriptionMsg struct {
Priority uint8 // delivered on priority channel
}
func (p *Peer) handleRequestSubscription(req *RequestSubscriptionMsg) (err error) {
func (p *Peer) handleRequestSubscription(ctx context.Context, req *RequestSubscriptionMsg) (err error) {
log.Debug(fmt.Sprintf("handleRequestSubscription: streamer %s to subscribe to %s with stream %s", p.streamer.addr.ID(), p.ID(), req.Stream))
return p.streamer.Subscribe(p.ID(), req.Stream, req.History, req.Priority)
}
func (p *Peer) handleSubscribeMsg(req *SubscribeMsg) (err error) {
func (p *Peer) handleSubscribeMsg(ctx context.Context, req *SubscribeMsg) (err error) {
metrics.GetOrRegisterCounter("peer.handlesubscribemsg", nil).Inc(1)
defer func() {
if err != nil {
if e := p.Send(SubscribeErrorMsg{
if e := p.Send(context.TODO(), SubscribeErrorMsg{
Error: err.Error(),
}); e != nil {
log.Error("send stream subscribe error message", "err", err)
@ -181,9 +184,15 @@ func (m OfferedHashesMsg) String() string {
// handleOfferedHashesMsg protocol msg handler calls the incoming streamer interface
// Filter method
func (p *Peer) handleOfferedHashesMsg(req *OfferedHashesMsg) error {
func (p *Peer) handleOfferedHashesMsg(ctx context.Context, req *OfferedHashesMsg) error {
metrics.GetOrRegisterCounter("peer.handleofferedhashes", nil).Inc(1)
var sp opentracing.Span
ctx, sp = spancontext.StartSpan(
ctx,
"handle.offered.hashes")
defer sp.Finish()
c, _, err := p.getOrSetClient(req.Stream, req.From, req.To)
if err != nil {
return err
@ -197,7 +206,7 @@ func (p *Peer) handleOfferedHashesMsg(req *OfferedHashesMsg) error {
for i := 0; i < len(hashes); i += HashSize {
hash := hashes[i : i+HashSize]
if wait := c.NeedData(hash); wait != nil {
if wait := c.NeedData(ctx, hash); wait != nil {
want.Set(i/HashSize, true)
wg.Add(1)
// create request and wait until the chunk data arrives and is stored
@ -260,7 +269,7 @@ func (p *Peer) handleOfferedHashesMsg(req *OfferedHashesMsg) error {
return
}
log.Trace("sending want batch", "peer", p.ID(), "stream", msg.Stream, "from", msg.From, "to", msg.To)
err := p.SendPriority(msg, c.priority)
err := p.SendPriority(ctx, msg, c.priority)
if err != nil {
log.Warn("SendPriority err, so dropping peer", "err", err)
p.Drop(err)
@ -285,7 +294,7 @@ func (m WantedHashesMsg) String() string {
// handleWantedHashesMsg protocol msg handler
// * sends the next batch of unsynced keys
// * sends the actual data chunks as per WantedHashesMsg
func (p *Peer) handleWantedHashesMsg(req *WantedHashesMsg) error {
func (p *Peer) handleWantedHashesMsg(ctx context.Context, req *WantedHashesMsg) error {
metrics.GetOrRegisterCounter("peer.handlewantedhashesmsg", nil).Inc(1)
log.Trace("received wanted batch", "peer", p.ID(), "stream", req.Stream, "from", req.From, "to", req.To)
@ -314,7 +323,7 @@ func (p *Peer) handleWantedHashesMsg(req *WantedHashesMsg) error {
metrics.GetOrRegisterCounter("peer.handlewantedhashesmsg.actualget", nil).Inc(1)
hash := hashes[i*HashSize : (i+1)*HashSize]
data, err := s.GetData(hash)
data, err := s.GetData(ctx, hash)
if err != nil {
return fmt.Errorf("handleWantedHashesMsg get data %x: %v", hash, err)
}
@ -323,7 +332,7 @@ func (p *Peer) handleWantedHashesMsg(req *WantedHashesMsg) error {
if length := len(chunk.SData); length < 9 {
log.Error("Chunk.SData to sync is too short", "len(chunk.SData)", length, "address", chunk.Addr)
}
if err := p.Deliver(chunk, s.priority); err != nil {
if err := p.Deliver(ctx, chunk, s.priority); err != nil {
return err
}
}
@ -363,7 +372,7 @@ func (m TakeoverProofMsg) String() string {
return fmt.Sprintf("Stream: '%v' [%v-%v], Root: %x, Sig: %x", m.Stream, m.Start, m.End, m.Root, m.Sig)
}
func (p *Peer) handleTakeoverProofMsg(req *TakeoverProofMsg) error {
func (p *Peer) handleTakeoverProofMsg(ctx context.Context, req *TakeoverProofMsg) error {
_, err := p.getServer(req.Stream)
// store the strongest takeoverproof for the stream in streamer
return err

40
swarm/network/stream/peer.go
View File

@ -27,8 +27,10 @@ import (
"github.com/ethereum/go-ethereum/swarm/log"
pq "github.com/ethereum/go-ethereum/swarm/network/priorityqueue"
"github.com/ethereum/go-ethereum/swarm/network/stream/intervals"
"github.com/ethereum/go-ethereum/swarm/spancontext"
"github.com/ethereum/go-ethereum/swarm/state"
"github.com/ethereum/go-ethereum/swarm/storage"
opentracing "github.com/opentracing/opentracing-go"
)
var sendTimeout = 30 * time.Second
@ -62,6 +64,11 @@ type Peer struct {
quit chan struct{}
}
type WrappedPriorityMsg struct {
Context context.Context
Msg interface{}
}
// NewPeer is the constructor for Peer
func NewPeer(peer *protocols.Peer, streamer *Registry) *Peer {
p := &Peer{
@ -74,7 +81,10 @@ func NewPeer(peer *protocols.Peer, streamer *Registry) *Peer {
quit: make(chan struct{}),
}
ctx, cancel := context.WithCancel(context.Background())
go p.pq.Run(ctx, func(i interface{}) { p.Send(i) })
go p.pq.Run(ctx, func(i interface{}) {
wmsg := i.(WrappedPriorityMsg)
p.Send(wmsg.Context, wmsg.Msg)
})
go func() {
<-p.quit
cancel()
@ -83,25 +93,41 @@ func NewPeer(peer *protocols.Peer, streamer *Registry) *Peer {
}
// Deliver sends a storeRequestMsg protocol message to the peer
func (p *Peer) Deliver(chunk *storage.Chunk, priority uint8) error {
func (p *Peer) Deliver(ctx context.Context, chunk *storage.Chunk, priority uint8) error {
var sp opentracing.Span
ctx, sp = spancontext.StartSpan(
ctx,
"send.chunk.delivery")
defer sp.Finish()
msg := &ChunkDeliveryMsg{
Addr: chunk.Addr,
SData: chunk.SData,
}
return p.SendPriority(msg, priority)
return p.SendPriority(ctx, msg, priority)
}
// SendPriority sends message to the peer using the outgoing priority queue
func (p *Peer) SendPriority(msg interface{}, priority uint8) error {
func (p *Peer) SendPriority(ctx context.Context, msg interface{}, priority uint8) error {
defer metrics.GetOrRegisterResettingTimer(fmt.Sprintf("peer.sendpriority_t.%d", priority), nil).UpdateSince(time.Now())
metrics.GetOrRegisterCounter(fmt.Sprintf("peer.sendpriority.%d", priority), nil).Inc(1)
ctx, cancel := context.WithTimeout(context.Background(), sendTimeout)
cctx, cancel := context.WithTimeout(context.Background(), sendTimeout)
defer cancel()
return p.pq.Push(ctx, msg, int(priority))
wmsg := WrappedPriorityMsg{
Context: ctx,
Msg: msg,
}
return p.pq.Push(cctx, wmsg, int(priority))
}
// SendOfferedHashes sends OfferedHashesMsg protocol msg
func (p *Peer) SendOfferedHashes(s *server, f, t uint64) error {
var sp opentracing.Span
ctx, sp := spancontext.StartSpan(
context.TODO(),
"send.offered.hashes")
defer sp.Finish()
hashes, from, to, proof, err := s.SetNextBatch(f, t)
if err != nil {
return err
@ -124,7 +150,7 @@ func (p *Peer) SendOfferedHashes(s *server, f, t uint64) error {
Stream: s.stream,
}
log.Trace("Swarm syncer offer batch", "peer", p.ID(), "stream", s.stream, "len", len(hashes), "from", from, "to", to)
return p.SendPriority(msg, s.priority)
return p.SendPriority(ctx, msg, s.priority)
}
func (p *Peer) getServer(s Stream) (*server, error) {

10
swarm/network/stream/snapshot_retrieval_test.go
View File

@ -55,10 +55,10 @@ func initRetrievalTest() {
//deliveries for each node
deliveries = make(map[discover.NodeID]*Delivery)
//global retrieve func
getRetrieveFunc = func(id discover.NodeID) func(chunk *storage.Chunk) error {
return func(chunk *storage.Chunk) error {
getRetrieveFunc = func(id discover.NodeID) func(ctx context.Context, chunk *storage.Chunk) error {
return func(ctx context.Context, chunk *storage.Chunk) error {
skipCheck := true
return deliveries[id].RequestFromPeers(chunk.Addr[:], skipCheck)
return deliveries[id].RequestFromPeers(ctx, chunk.Addr[:], skipCheck)
}
}
//registries, map of discover.NodeID to its streamer
@ -412,7 +412,7 @@ func runFileRetrievalTest(nodeCount int) error {
for i, hash := range conf.hashes {
reader, _ := fileStore.Retrieve(context.TODO(), hash)
//check that we can read the file size and that it corresponds to the generated file size
if s, err := reader.Size(nil); err != nil || s != int64(len(randomFiles[i])) {
if s, err := reader.Size(context.TODO(), nil); err != nil || s != int64(len(randomFiles[i])) {
allSuccess = false
log.Warn("Retrieve error", "err", err, "hash", hash, "nodeId", id)
} else {
@ -699,7 +699,7 @@ func runRetrievalTest(chunkCount int, nodeCount int) error {
for _, chnk := range conf.hashes {
reader, _ := fileStore.Retrieve(context.TODO(), chnk)
//assuming that reading the Size of the chunk is enough to know we found it
if s, err := reader.Size(nil); err != nil || s != chunkSize {
if s, err := reader.Size(context.TODO(), nil); err != nil || s != chunkSize {
allSuccess = false
log.Warn("Retrieve error", "err", err, "chunk", chnk, "nodeId", id)
} else {

2
swarm/network/stream/snapshot_sync_test.go
View File

@ -437,7 +437,7 @@ func runSyncTest(chunkCount int, nodeCount int, live bool, history bool) error {
} else {
//use the actual localstore
lstore := stores[id]
_, err = lstore.Get(chunk)
_, err = lstore.Get(context.TODO(), chunk)
}
if err != nil {
log.Warn(fmt.Sprintf("Chunk %s NOT found for id %s", chunk, id))

42
swarm/network/stream/stream.go
View File

@ -32,8 +32,10 @@ import (
"github.com/ethereum/go-ethereum/swarm/network"
"github.com/ethereum/go-ethereum/swarm/network/stream/intervals"
"github.com/ethereum/go-ethereum/swarm/pot"
"github.com/ethereum/go-ethereum/swarm/spancontext"
"github.com/ethereum/go-ethereum/swarm/state"
"github.com/ethereum/go-ethereum/swarm/storage"
opentracing "github.com/opentracing/opentracing-go"
)
const (
@ -235,7 +237,7 @@ func (r *Registry) RequestSubscription(peerId discover.NodeID, s Stream, h *Rang
if e, ok := err.(*notFoundError); ok && e.t == "server" {
// request subscription only if the server for this stream is not created
log.Debug("RequestSubscription ", "peer", peerId, "stream", s, "history", h)
return peer.Send(&RequestSubscriptionMsg{
return peer.Send(context.TODO(), &RequestSubscriptionMsg{
Stream: s,
History: h,
Priority: prio,
@ -285,7 +287,7 @@ func (r *Registry) Subscribe(peerId discover.NodeID, s Stream, h *Range, priorit
}
log.Debug("Subscribe ", "peer", peerId, "stream", s, "history", h)
return peer.SendPriority(msg, priority)
return peer.SendPriority(context.TODO(), msg, priority)
}
func (r *Registry) Unsubscribe(peerId discover.NodeID, s Stream) error {
@ -299,7 +301,7 @@ func (r *Registry) Unsubscribe(peerId discover.NodeID, s Stream) error {
}
log.Debug("Unsubscribe ", "peer", peerId, "stream", s)
if err := peer.Send(msg); err != nil {
if err := peer.Send(context.TODO(), msg); err != nil {
return err
}
return peer.removeClient(s)
@ -320,11 +322,17 @@ func (r *Registry) Quit(peerId discover.NodeID, s Stream) error {
}
log.Debug("Quit ", "peer", peerId, "stream", s)
return peer.Send(msg)
return peer.Send(context.TODO(), msg)
}
func (r *Registry) Retrieve(chunk *storage.Chunk) error {
return r.delivery.RequestFromPeers(chunk.Addr[:], r.skipCheck)
func (r *Registry) Retrieve(ctx context.Context, chunk *storage.Chunk) error {
var sp opentracing.Span
ctx, sp = spancontext.StartSpan(
ctx,
"registry.retrieve")
defer sp.Finish()
return r.delivery.RequestFromPeers(ctx, chunk.Addr[:], r.skipCheck)
}
func (r *Registry) NodeInfo() interface{} {
@ -460,11 +468,11 @@ func (r *Registry) runProtocol(p *p2p.Peer, rw p2p.MsgReadWriter) error {
}
// HandleMsg is the message handler that delegates incoming messages
func (p *Peer) HandleMsg(msg interface{}) error {
func (p *Peer) HandleMsg(ctx context.Context, msg interface{}) error {
switch msg := msg.(type) {
case *SubscribeMsg:
return p.handleSubscribeMsg(msg)
return p.handleSubscribeMsg(ctx, msg)
case *SubscribeErrorMsg:
return p.handleSubscribeErrorMsg(msg)
@ -473,22 +481,22 @@ func (p *Peer) HandleMsg(msg interface{}) error {
return p.handleUnsubscribeMsg(msg)
case *OfferedHashesMsg:
return p.handleOfferedHashesMsg(msg)
return p.handleOfferedHashesMsg(ctx, msg)
case *TakeoverProofMsg:
return p.handleTakeoverProofMsg(msg)
return p.handleTakeoverProofMsg(ctx, msg)
case *WantedHashesMsg:
return p.handleWantedHashesMsg(msg)
return p.handleWantedHashesMsg(ctx, msg)
case *ChunkDeliveryMsg:
return p.streamer.delivery.handleChunkDeliveryMsg(p, msg)
return p.streamer.delivery.handleChunkDeliveryMsg(ctx, p, msg)
case *RetrieveRequestMsg:
return p.streamer.delivery.handleRetrieveRequestMsg(p, msg)
return p.streamer.delivery.handleRetrieveRequestMsg(ctx, p, msg)
case *RequestSubscriptionMsg:
return p.handleRequestSubscription(msg)
return p.handleRequestSubscription(ctx, msg)
case *QuitMsg:
return p.handleQuitMsg(msg)
@ -508,7 +516,7 @@ type server struct {
// Server interface for outgoing peer Streamer
type Server interface {
SetNextBatch(uint64, uint64) (hashes []byte, from uint64, to uint64, proof *HandoverProof, err error)
GetData([]byte) ([]byte, error)
GetData(context.Context, []byte) ([]byte, error)
Close()
}
@ -551,7 +559,7 @@ func (c client) NextInterval() (start, end uint64, err error) {
// Client interface for incoming peer Streamer
type Client interface {
NeedData([]byte) func()
NeedData(context.Context, []byte) func()
BatchDone(Stream, uint64, []byte, []byte) func() (*TakeoverProof, error)
Close()
}
@ -588,7 +596,7 @@ func (c *client) batchDone(p *Peer, req *OfferedHashesMsg, hashes []byte) error
if err != nil {
return err
}
if err := p.SendPriority(tp, c.priority); err != nil {
if err := p.SendPriority(context.TODO(), tp, c.priority); err != nil {
return err
}
if c.to > 0 && tp.Takeover.End >= c.to {

5
swarm/network/stream/streamer_test.go
View File

@ -18,6 +18,7 @@ package stream
import (
"bytes"
"context"
"testing"
"time"
@ -79,7 +80,7 @@ func newTestClient(t string) *testClient {
}
}
func (self *testClient) NeedData(hash []byte) func() {
func (self *testClient) NeedData(ctx context.Context, hash []byte) func() {
self.receivedHashes[string(hash)] = hash
if bytes.Equal(hash, hash0[:]) {
return func() {
@ -114,7 +115,7 @@ func (self *testServer) SetNextBatch(from uint64, to uint64) ([]byte, uint64, ui
return make([]byte, HashSize), from + 1, to + 1, nil, nil
}
func (self *testServer) GetData([]byte) ([]byte, error) {
func (self *testServer) GetData(context.Context, []byte) ([]byte, error) {
return nil, nil
}

9
swarm/network/stream/syncer.go
View File

@ -17,6 +17,7 @@
package stream
import (
"context"
"math"
"strconv"
"time"
@ -78,8 +79,8 @@ func (s *SwarmSyncerServer) Close() {
}
// GetSection retrieves the actual chunk from localstore
func (s *SwarmSyncerServer) GetData(key []byte) ([]byte, error) {
chunk, err := s.db.Get(storage.Address(key))
func (s *SwarmSyncerServer) GetData(ctx context.Context, key []byte) ([]byte, error) {
chunk, err := s.db.Get(ctx, storage.Address(key))
if err == storage.ErrFetching {
<-chunk.ReqC
} else if err != nil {
@ -210,8 +211,8 @@ func RegisterSwarmSyncerClient(streamer *Registry, db *storage.DBAPI) {
}
// NeedData
func (s *SwarmSyncerClient) NeedData(key []byte) (wait func()) {
chunk, _ := s.db.GetOrCreateRequest(key)
func (s *SwarmSyncerClient) NeedData(ctx context.Context, key []byte) (wait func()) {
chunk, _ := s.db.GetOrCreateRequest(ctx, key)
// TODO: we may want to request from this peer anyway even if the request exists
// ignoreExistingRequest is temporary commented out until its functionality is verified.

2
swarm/network/stream/syncer_test.go
View File

@ -231,7 +231,7 @@ func testSyncBetweenNodes(t *testing.T, nodes, conns, chunkCount int, skipCheck
for j := i; j < nodes; j++ {
total += len(hashes[j])
for _, key := range hashes[j] {
chunk, err := dbs[i].Get(key)
chunk, err := dbs[i].Get(ctx, key)
if err == storage.ErrFetching {
<-chunk.ReqC
} else if err != nil {

5
swarm/pss/ping.go
View File

@ -19,6 +19,7 @@
package pss
import (
"context"
"errors"
"time"
@ -40,7 +41,7 @@ type Ping struct {
InC chan bool // optional, report back to calling code
}
func (p *Ping) pingHandler(msg interface{}) error {
func (p *Ping) pingHandler(ctx context.Context, msg interface{}) error {
var pingmsg *PingMsg
var ok bool
if pingmsg, ok = msg.(*PingMsg); !ok {
@ -80,7 +81,7 @@ func NewPingProtocol(ping *Ping) *p2p.Protocol {
for {
select {
case ispong := <-ping.OutC:
pp.Send(&PingMsg{
pp.Send(context.TODO(), &PingMsg{
Created: time.Now(),
Pong: ispong,
})

7
swarm/pss/pss.go
View File

@ -18,6 +18,7 @@ package pss
import (
"bytes"
"context"
"crypto/ecdsa"
"crypto/rand"
"errors"
@ -71,7 +72,7 @@ type senderPeer interface {
Info() *p2p.PeerInfo
ID() discover.NodeID
Address() []byte
Send(interface{}) error
Send(context.Context, interface{}) error
}
// per-key peer related information
@ -344,7 +345,7 @@ func (p *Pss) getHandlers(topic Topic) map[*Handler]bool {
// Check if address partially matches
// If yes, it CAN be for us, and we process it
// Only passes error to pss protocol handler if payload is not valid pssmsg
func (p *Pss) handlePssMsg(msg interface{}) error {
func (p *Pss) handlePssMsg(ctx context.Context, msg interface{}) error {
metrics.GetOrRegisterCounter("pss.handlepssmsg", nil).Inc(1)
pssmsg, ok := msg.(*PssMsg)
@ -844,7 +845,7 @@ func (p *Pss) forward(msg *PssMsg) error {
p.fwdPoolMu.RUnlock()
// attempt to send the message
err := pp.Send(msg)
err := pp.Send(context.TODO(), msg)
if err != nil {
metrics.GetOrRegisterCounter("pss.pp.send.error", nil).Inc(1)
log.Error(err.Error())

12
swarm/pss/pss_test.go
View File

@ -334,7 +334,7 @@ func TestHandlerConditions(t *testing.T) {
Data: []byte{0x66, 0x6f, 0x6f},
},
}
if err := ps.handlePssMsg(msg); err != nil {
if err := ps.handlePssMsg(context.TODO(), msg); err != nil {
t.Fatal(err.Error())
}
tmr := time.NewTimer(time.Millisecond * 100)
@ -351,7 +351,7 @@ func TestHandlerConditions(t *testing.T) {
// message should pass and queue due to partial length
msg.To = addr[0:1]
msg.Payload.Data = []byte{0x78, 0x79, 0x80, 0x80, 0x79}
if err := ps.handlePssMsg(msg); err != nil {
if err := ps.handlePssMsg(context.TODO(), msg); err != nil {
t.Fatal(err.Error())
}
tmr.Reset(time.Millisecond * 100)
@ -374,7 +374,7 @@ func TestHandlerConditions(t *testing.T) {
// full address mismatch should put message in queue
msg.To[0] = 0xff
if err := ps.handlePssMsg(msg); err != nil {
if err := ps.handlePssMsg(context.TODO(), msg); err != nil {
t.Fatal(err.Error())
}
tmr.Reset(time.Millisecond * 10)
@ -397,7 +397,7 @@ func TestHandlerConditions(t *testing.T) {
// expired message should be dropped
msg.Expire = uint32(time.Now().Add(-time.Second).Unix())
if err := ps.handlePssMsg(msg); err != nil {
if err := ps.handlePssMsg(context.TODO(), msg); err != nil {
t.Fatal(err.Error())
}
tmr.Reset(time.Millisecond * 10)
@ -417,7 +417,7 @@ func TestHandlerConditions(t *testing.T) {
}{
pssMsg: &PssMsg{},
}
if err := ps.handlePssMsg(fckedupmsg); err == nil {
if err := ps.handlePssMsg(context.TODO(), fckedupmsg); err == nil {
t.Fatalf("expected error from processMsg but error nil")
}
@ -427,7 +427,7 @@ func TestHandlerConditions(t *testing.T) {
ps.outbox <- msg
}
msg.Payload.Data = []byte{0x62, 0x61, 0x72}
err = ps.handlePssMsg(msg)
err = ps.handlePssMsg(context.TODO(), msg)
if err == nil {
t.Fatal("expected error when mailbox full, but was nil")
}

49
swarm/spancontext/spancontext.go Normal file
View File

@ -0,0 +1,49 @@
package spancontext
import (
"context"
opentracing "github.com/opentracing/opentracing-go"
)
func WithContext(ctx context.Context, sctx opentracing.SpanContext) context.Context {
return context.WithValue(ctx, "span_context", sctx)
}
func FromContext(ctx context.Context) opentracing.SpanContext {
sctx, ok := ctx.Value("span_context").(opentracing.SpanContext)
if ok {
return sctx
}
return nil
}
func StartSpan(ctx context.Context, name string) (context.Context, opentracing.Span) {
tracer := opentracing.GlobalTracer()
sctx := FromContext(ctx)
var sp opentracing.Span
if sctx != nil {
sp = tracer.StartSpan(
name,
opentracing.ChildOf(sctx))
} else {
sp = tracer.StartSpan(name)
}
nctx := context.WithValue(ctx, "span_context", sp.Context())
return nctx, sp
}
func StartSpanFrom(name string, sctx opentracing.SpanContext) opentracing.Span {
tracer := opentracing.GlobalTracer()
sp := tracer.StartSpan(
name,
opentracing.ChildOf(sctx))
return sp
}

53
swarm/storage/chunker.go
View File

@ -26,6 +26,9 @@ import (
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/spancontext"
opentracing "github.com/opentracing/opentracing-go"
olog "github.com/opentracing/opentracing-go/log"
)
/*
@ -93,9 +96,12 @@ type JoinerParams struct {
getter Getter
// TODO: there is a bug, so depth can only be 0 today, see: https://github.com/ethersphere/go-ethereum/issues/344
depth int
ctx context.Context
}
type TreeChunker struct {
ctx context.Context
branches int64
hashFunc SwarmHasher
dataSize int64
@ -136,6 +142,7 @@ func TreeJoin(ctx context.Context, addr Address, getter Getter, depth int) *Lazy
addr: addr,
getter: getter,
depth: depth,
ctx: ctx,
}
return NewTreeJoiner(jp).Join(ctx)
@ -174,6 +181,8 @@ func NewTreeJoiner(params *JoinerParams) *TreeChunker {
tc.errC = make(chan error)
tc.quitC = make(chan bool)
tc.ctx = params.ctx
return tc
}
@ -351,7 +360,7 @@ func (tc *TreeChunker) runWorker() {
return
}
h, err := tc.putter.Put(job.chunk)
h, err := tc.putter.Put(tc.ctx, job.chunk)
if err != nil {
tc.errC <- err
return
@ -371,6 +380,7 @@ func (tc *TreeChunker) Append() (Address, func(), error) {
// LazyChunkReader implements LazySectionReader
type LazyChunkReader struct {
Ctx context.Context
key Address // root key
chunkData ChunkData
off int64 // offset
@ -389,16 +399,28 @@ func (tc *TreeChunker) Join(ctx context.Context) *LazyChunkReader {
hashSize: tc.hashSize,
depth: tc.depth,
getter: tc.getter,
Ctx: tc.ctx,
}
}
func (r *LazyChunkReader) Context() context.Context {
return r.Ctx
}
// Size is meant to be called on the LazySectionReader
func (r *LazyChunkReader) Size(quitC chan bool) (n int64, err error) {
func (r *LazyChunkReader) Size(ctx context.Context, quitC chan bool) (n int64, err error) {
metrics.GetOrRegisterCounter("lazychunkreader.size", nil).Inc(1)
var sp opentracing.Span
var cctx context.Context
cctx, sp = spancontext.StartSpan(
ctx,
"lcr.size")
defer sp.Finish()
log.Debug("lazychunkreader.size", "key", r.key)
if r.chunkData == nil {
chunkData, err := r.getter.Get(Reference(r.key))
chunkData, err := r.getter.Get(cctx, Reference(r.key))
if err != nil {
return 0, err
}
@ -421,12 +443,25 @@ func (r *LazyChunkReader) Size(quitC chan bool) (n int64, err error) {
func (r *LazyChunkReader) ReadAt(b []byte, off int64) (read int, err error) {
metrics.GetOrRegisterCounter("lazychunkreader.readat", nil).Inc(1)
var sp opentracing.Span
var cctx context.Context
cctx, sp = spancontext.StartSpan(
r.Ctx,
"lcr.read")
defer sp.Finish()
defer func() {
sp.LogFields(
olog.Int("off", int(off)),
olog.Int("read", read))
}()
// this is correct, a swarm doc cannot be zero length, so no EOF is expected
if len(b) == 0 {
return 0, nil
}
quitC := make(chan bool)
size, err := r.Size(quitC)
size, err := r.Size(cctx, quitC)
if err != nil {
log.Error("lazychunkreader.readat.size", "size", size, "err", err)
return 0, err
@ -449,7 +484,7 @@ func (r *LazyChunkReader) ReadAt(b []byte, off int64) (read int, err error) {
length *= r.chunkSize
}
wg.Add(1)
go r.join(b, off, off+length, depth, treeSize/r.branches, r.chunkData, &wg, errC, quitC)
go r.join(cctx, b, off, off+length, depth, treeSize/r.branches, r.chunkData, &wg, errC, quitC)
go func() {
wg.Wait()
close(errC)
@ -467,7 +502,7 @@ func (r *LazyChunkReader) ReadAt(b []byte, off int64) (read int, err error) {
return len(b), nil
}
func (r *LazyChunkReader) join(b []byte, off int64, eoff int64, depth int, treeSize int64, chunkData ChunkData, parentWg *sync.WaitGroup, errC chan error, quitC chan bool) {
func (r *LazyChunkReader) join(ctx context.Context, b []byte, off int64, eoff int64, depth int, treeSize int64, chunkData ChunkData, parentWg *sync.WaitGroup, errC chan error, quitC chan bool) {
defer parentWg.Done()
// find appropriate block level
for chunkData.Size() < treeSize && depth > r.depth {
@ -514,7 +549,7 @@ func (r *LazyChunkReader) join(b []byte, off int64, eoff int64, depth int, treeS
wg.Add(1)
go func(j int64) {
childKey := chunkData[8+j*r.hashSize : 8+(j+1)*r.hashSize]
chunkData, err := r.getter.Get(Reference(childKey))
chunkData, err := r.getter.Get(ctx, Reference(childKey))
if err != nil {
log.Error("lazychunkreader.join", "key", fmt.Sprintf("%x", childKey), "err", err)
select {
@ -533,7 +568,7 @@ func (r *LazyChunkReader) join(b []byte, off int64, eoff int64, depth int, treeS
if soff < off {
soff = off
}
r.join(b[soff-off:seoff-off], soff-roff, seoff-roff, depth-1, treeSize/r.branches, chunkData, wg, errC, quitC)
r.join(ctx, b[soff-off:seoff-off], soff-roff, seoff-roff, depth-1, treeSize/r.branches, chunkData, wg, errC, quitC)
}(i)
} //for
}
@ -570,7 +605,7 @@ func (r *LazyChunkReader) Seek(offset int64, whence int) (int64, error) {
offset += r.off
case 2:
if r.chunkData == nil { //seek from the end requires rootchunk for size. call Size first
_, err := r.Size(nil)
_, err := r.Size(context.TODO(), nil)
if err != nil {
return 0, fmt.Errorf("can't get size: %v", err)
}

6
swarm/storage/chunker_test.go
View File

@ -50,11 +50,11 @@ type fakeChunkStore struct {
}
// Put doesn't store anything it is just here to implement ChunkStore
func (f *fakeChunkStore) Put(*Chunk) {
func (f *fakeChunkStore) Put(context.Context, *Chunk) {
}
// Gut doesn't store anything it is just here to implement ChunkStore
func (f *fakeChunkStore) Get(Address) (*Chunk, error) {
func (f *fakeChunkStore) Get(context.Context, Address) (*Chunk, error) {
return nil, errors.New("FakeChunkStore doesn't support Get")
}
@ -281,7 +281,7 @@ func TestRandomBrokenData(t *testing.T) {
}
func benchReadAll(reader LazySectionReader) {
size, _ := reader.Size(nil)
size, _ := reader.Size(context.TODO(), nil)
output := make([]byte, 1000)
for pos := int64(0); pos < size; pos += 1000 {
reader.ReadAt(output, pos)

13
swarm/storage/chunkstore.go
View File

@ -16,7 +16,10 @@
package storage
import "sync"
import (
"context"
"sync"
)
/*
ChunkStore interface is implemented by :
@ -28,8 +31,8 @@ ChunkStore interface is implemented by :
- FakeChunkStore: dummy store which doesn't store anything just implements the interface
*/
type ChunkStore interface {
Put(*Chunk) // effectively there is no error even if there is an error
Get(Address) (*Chunk, error)
Put(context.Context, *Chunk) // effectively there is no error even if there is an error
Get(context.Context, Address) (*Chunk, error)
Close()
}
@ -45,14 +48,14 @@ func NewMapChunkStore() *MapChunkStore {
}
}
func (m *MapChunkStore) Put(chunk *Chunk) {
func (m *MapChunkStore) Put(ctx context.Context, chunk *Chunk) {
m.mu.Lock()
defer m.mu.Unlock()
m.chunks[chunk.Addr.Hex()] = chunk
chunk.markAsStored()
}
func (m *MapChunkStore) Get(addr Address) (*Chunk, error) {
func (m *MapChunkStore) Get(ctx context.Context, addr Address) (*Chunk, error) {
m.mu.RLock()
defer m.mu.RUnlock()
chunk := m.chunks[addr.Hex()]

3
swarm/storage/common.go
View File

@ -16,6 +16,7 @@
package storage
import (
"context"
"sync"
"github.com/ethereum/go-ethereum/swarm/log"
@ -37,7 +38,7 @@ func PutChunks(store *LocalStore, chunks ...*Chunk) {
}
}()
for _, c := range chunks {
go store.Put(c)
go store.Put(context.TODO(), c)
}
wg.Wait()
}

5
swarm/storage/common_test.go
View File

@ -18,6 +18,7 @@ package storage
import (
"bytes"
"context"
"crypto/rand"
"flag"
"fmt"
@ -69,7 +70,7 @@ func mput(store ChunkStore, processors int, n int, f func(i int64) *Chunk) (hs [
for chunk := range c {
wg.Add(1)
chunk := chunk
store.Put(chunk)
store.Put(context.TODO(), chunk)
go func() {
defer wg.Done()
<-chunk.dbStoredC
@ -103,7 +104,7 @@ func mget(store ChunkStore, hs []Address, f func(h Address, chunk *Chunk) error)
for _, k := range hs {
go func(h Address) {
defer wg.Done()
chunk, err := store.Get(h)
chunk, err := store.Get(context.TODO(), h)
if err != nil {
errc <- err
return

14
swarm/storage/dbapi.go
View File

@ -16,6 +16,8 @@
package storage
import "context"
// wrapper of db-s to provide mockable custom local chunk store access to syncer
type DBAPI struct {
db *LDBStore
@ -27,8 +29,8 @@ func NewDBAPI(loc *LocalStore) *DBAPI {
}
// to obtain the chunks from address or request db entry only
func (d *DBAPI) Get(addr Address) (*Chunk, error) {
return d.loc.Get(addr)
func (d *DBAPI) Get(ctx context.Context, addr Address) (*Chunk, error) {
return d.loc.Get(ctx, addr)
}
// current storage counter of chunk db
@ -42,11 +44,11 @@ func (d *DBAPI) Iterator(from uint64, to uint64, po uint8, f func(Address, uint6
}
// to obtain the chunks from address or request db entry only
func (d *DBAPI) GetOrCreateRequest(addr Address) (*Chunk, bool) {
return d.loc.GetOrCreateRequest(addr)
func (d *DBAPI) GetOrCreateRequest(ctx context.Context, addr Address) (*Chunk, bool) {
return d.loc.GetOrCreateRequest(ctx, addr)
}
// to obtain the chunks from key or request db entry only
func (d *DBAPI) Put(chunk *Chunk) {
d.loc.Put(chunk)
func (d *DBAPI) Put(ctx context.Context, chunk *Chunk) {
d.loc.Put(ctx, chunk)
}

12
swarm/storage/hasherstore.go
View File

@ -74,7 +74,7 @@ func NewHasherStore(chunkStore ChunkStore, hashFunc SwarmHasher, toEncrypt bool)
// Put stores the chunkData into the ChunkStore of the hasherStore and returns the reference.
// If hasherStore has a chunkEncryption object, the data will be encrypted.
// Asynchronous function, the data will not necessarily be stored when it returns.
func (h *hasherStore) Put(chunkData ChunkData) (Reference, error) {
func (h *hasherStore) Put(ctx context.Context, chunkData ChunkData) (Reference, error) {
c := chunkData
size := chunkData.Size()
var encryptionKey encryption.Key
@ -87,7 +87,7 @@ func (h *hasherStore) Put(chunkData ChunkData) (Reference, error) {
}
chunk := h.createChunk(c, size)
h.storeChunk(chunk)
h.storeChunk(ctx, chunk)
return Reference(append(chunk.Addr, encryptionKey...)), nil
}
@ -95,14 +95,14 @@ func (h *hasherStore) Put(chunkData ChunkData) (Reference, error) {
// Get returns data of the chunk with the given reference (retrieved from the ChunkStore of hasherStore).
// If the data is encrypted and the reference contains an encryption key, it will be decrypted before
// return.
func (h *hasherStore) Get(ref Reference) (ChunkData, error) {
func (h *hasherStore) Get(ctx context.Context, ref Reference) (ChunkData, error) {
key, encryptionKey, err := parseReference(ref, h.hashSize)
if err != nil {
return nil, err
}
toDecrypt := (encryptionKey != nil)
chunk, err := h.store.Get(key)
chunk, err := h.store.Get(ctx, key)
if err != nil {
return nil, err
}
@ -207,13 +207,13 @@ func (h *hasherStore) RefSize() int64 {
return h.refSize
}
func (h *hasherStore) storeChunk(chunk *Chunk) {
func (h *hasherStore) storeChunk(ctx context.Context, chunk *Chunk) {
h.wg.Add(1)
go func() {
<-chunk.dbStoredC
h.wg.Done()
}()
h.store.Put(chunk)
h.store.Put(ctx, chunk)
}
func parseReference(ref Reference, hashSize int) (Address, encryption.Key, error) {

10
swarm/storage/hasherstore_test.go
View File

@ -47,13 +47,13 @@ func TestHasherStore(t *testing.T) {
// Put two random chunks into the hasherStore
chunkData1 := GenerateRandomChunk(int64(tt.chunkLength)).SData
key1, err := hasherStore.Put(chunkData1)
key1, err := hasherStore.Put(context.TODO(), chunkData1)
if err != nil {
t.Fatalf("Expected no error got \"%v\"", err)
}
chunkData2 := GenerateRandomChunk(int64(tt.chunkLength)).SData
key2, err := hasherStore.Put(chunkData2)
key2, err := hasherStore.Put(context.TODO(), chunkData2)
if err != nil {
t.Fatalf("Expected no error got \"%v\"", err)
}
@ -67,7 +67,7 @@ func TestHasherStore(t *testing.T) {
}
// Get the first chunk
retrievedChunkData1, err := hasherStore.Get(key1)
retrievedChunkData1, err := hasherStore.Get(context.TODO(), key1)
if err != nil {
t.Fatalf("Expected no error, got \"%v\"", err)
}
@ -78,7 +78,7 @@ func TestHasherStore(t *testing.T) {
}
// Get the second chunk
retrievedChunkData2, err := hasherStore.Get(key2)
retrievedChunkData2, err := hasherStore.Get(context.TODO(), key2)
if err != nil {
t.Fatalf("Expected no error, got \"%v\"", err)
}
@ -105,7 +105,7 @@ func TestHasherStore(t *testing.T) {
}
// Check if chunk data in store is encrypted or not
chunkInStore, err := chunkStore.Get(hash1)
chunkInStore, err := chunkStore.Get(context.TODO(), hash1)
if err != nil {
t.Fatalf("Expected no error got \"%v\"", err)
}

7
swarm/storage/ldbstore.go
View File

@ -25,6 +25,7 @@ package storage
import (
"archive/tar"
"bytes"
"context"
"encoding/binary"
"encoding/hex"
"fmt"
@ -370,7 +371,7 @@ func (s *LDBStore) Import(in io.Reader) (int64, error) {
key := Address(keybytes)
chunk := NewChunk(key, nil)
chunk.SData = data[32:]
s.Put(chunk)
s.Put(context.TODO(), chunk)
wg.Add(1)
go func() {
defer wg.Done()
@ -499,7 +500,7 @@ func (s *LDBStore) CurrentStorageIndex() uint64 {
return s.dataIdx
}
func (s *LDBStore) Put(chunk *Chunk) {
func (s *LDBStore) Put(ctx context.Context, chunk *Chunk) {
metrics.GetOrRegisterCounter("ldbstore.put", nil).Inc(1)
log.Trace("ldbstore.put", "key", chunk.Addr)
@ -639,7 +640,7 @@ func (s *LDBStore) tryAccessIdx(ikey []byte, index *dpaDBIndex) bool {
return true
}
func (s *LDBStore) Get(addr Address) (chunk *Chunk, err error) {
func (s *LDBStore) Get(ctx context.Context, addr Address) (chunk *Chunk, err error) {
metrics.GetOrRegisterCounter("ldbstore.get", nil).Inc(1)
log.Trace("ldbstore.get", "key", addr)

25
swarm/storage/ldbstore_test.go
View File

@ -18,6 +18,7 @@ package storage
import (
"bytes"
"context"
"fmt"
"io/ioutil"
"os"
@ -157,7 +158,7 @@ func testDbStoreNotFound(t *testing.T, mock bool) {
t.Fatalf("init dbStore failed: %v", err)
}
_, err = db.Get(ZeroAddr)
_, err = db.Get(context.TODO(), ZeroAddr)
if err != ErrChunkNotFound {
t.Errorf("Expected ErrChunkNotFound, got %v", err)
}
@ -188,7 +189,7 @@ func testIterator(t *testing.T, mock bool) {
wg := &sync.WaitGroup{}
wg.Add(len(chunks))
for i = 0; i < len(chunks); i++ {
db.Put(chunks[i])
db.Put(context.TODO(), chunks[i])
chunkkeys[i] = chunks[i].Addr
j := i
go func() {
@ -299,7 +300,7 @@ func TestLDBStoreWithoutCollectGarbage(t *testing.T) {
}
for i := 0; i < n; i++ {
go ldb.Put(chunks[i])
go ldb.Put(context.TODO(), chunks[i])
}
// wait for all chunks to be stored
@ -310,7 +311,7 @@ func TestLDBStoreWithoutCollectGarbage(t *testing.T) {
log.Info("ldbstore", "entrycnt", ldb.entryCnt, "accesscnt", ldb.accessCnt)
for i := 0; i < n; i++ {
ret, err := ldb.Get(chunks[i].Addr)
ret, err := ldb.Get(context.TODO(), chunks[i].Addr)
if err != nil {
t.Fatal(err)
}
@ -349,7 +350,7 @@ func TestLDBStoreCollectGarbage(t *testing.T) {
}
for i := 0; i < n; i++ {
ldb.Put(chunks[i])
ldb.Put(context.TODO(), chunks[i])
}
// wait for all chunks to be stored
@ -364,7 +365,7 @@ func TestLDBStoreCollectGarbage(t *testing.T) {
var missing int
for i := 0; i < n; i++ {
ret, err := ldb.Get(chunks[i].Addr)
ret, err := ldb.Get(context.TODO(), chunks[i].Addr)
if err == ErrChunkNotFound || err == ldberrors.ErrNotFound {
missing++
continue
@ -403,7 +404,7 @@ func TestLDBStoreAddRemove(t *testing.T) {
}
for i := 0; i < n; i++ {
go ldb.Put(chunks[i])
go ldb.Put(context.TODO(), chunks[i])
}
// wait for all chunks to be stored before continuing
@ -428,7 +429,7 @@ func TestLDBStoreAddRemove(t *testing.T) {
log.Info("ldbstore", "entrycnt", ldb.entryCnt, "accesscnt", ldb.accessCnt)
for i := 0; i < n; i++ {
ret, err := ldb.Get(chunks[i].Addr)
ret, err := ldb.Get(context.TODO(), chunks[i].Addr)
if i%2 == 0 {
// expect even chunks to be missing
@ -465,7 +466,7 @@ func TestLDBStoreRemoveThenCollectGarbage(t *testing.T) {
}
for i := 0; i < n; i++ {
ldb.Put(chunks[i])
ldb.Put(context.TODO(), chunks[i])
}
// wait for all chunks to be stored before continuing
@ -494,7 +495,7 @@ func TestLDBStoreRemoveThenCollectGarbage(t *testing.T) {
n = 10
for i := 0; i < n; i++ {
ldb.Put(chunks[i])
ldb.Put(context.TODO(), chunks[i])
}
// wait for all chunks to be stored before continuing
@ -504,14 +505,14 @@ func TestLDBStoreRemoveThenCollectGarbage(t *testing.T) {
// expect for first chunk to be missing, because it has the smallest access value
idx := 0
ret, err := ldb.Get(chunks[idx].Addr)
ret, err := ldb.Get(context.TODO(), chunks[idx].Addr)
if err == nil || ret != nil {
t.Fatal("expected first chunk to be missing, but got no error")
}
// expect for last chunk to be present, as it has the largest access value
idx = 9
ret, err = ldb.Get(chunks[idx].Addr)
ret, err = ldb.Get(context.TODO(), chunks[idx].Addr)
if err != nil {
t.Fatalf("expected no error, but got %s", err)
}

27
swarm/storage/localstore.go
View File

@ -17,6 +17,7 @@
package storage
import (
"context"
"encoding/binary"
"fmt"
"path/filepath"
@ -96,7 +97,7 @@ func NewTestLocalStoreForAddr(params *LocalStoreParams) (*LocalStore, error) {
// when the chunk is stored in memstore.
// After the LDBStore.Put, it is ensured that the MemStore
// contains the chunk with the same data, but nil ReqC channel.
func (ls *LocalStore) Put(chunk *Chunk) {
func (ls *LocalStore) Put(ctx context.Context, chunk *Chunk) {
if l := len(chunk.SData); l < 9 {
log.Debug("incomplete chunk data", "addr", chunk.Addr, "length", l)
chunk.SetErrored(ErrChunkInvalid)
@ -123,7 +124,7 @@ func (ls *LocalStore) Put(chunk *Chunk) {
chunk.Size = int64(binary.LittleEndian.Uint64(chunk.SData[0:8]))
memChunk, err := ls.memStore.Get(chunk.Addr)
memChunk, err := ls.memStore.Get(ctx, chunk.Addr)
switch err {
case nil:
if memChunk.ReqC == nil {
@ -136,7 +137,7 @@ func (ls *LocalStore) Put(chunk *Chunk) {
return
}
ls.DbStore.Put(chunk)
ls.DbStore.Put(ctx, chunk)
// chunk is no longer a request, but a chunk with data, so replace it in memStore
newc := NewChunk(chunk.Addr, nil)
@ -144,7 +145,7 @@ func (ls *LocalStore) Put(chunk *Chunk) {
newc.Size = chunk.Size
newc.dbStoredC = chunk.dbStoredC
ls.memStore.Put(newc)
ls.memStore.Put(ctx, newc)
if memChunk != nil && memChunk.ReqC != nil {
close(memChunk.ReqC)
@ -155,15 +156,15 @@ func (ls *LocalStore) Put(chunk *Chunk) {
// This method is blocking until the chunk is retrieved
// so additional timeout may be needed to wrap this call if
// ChunkStores are remote and can have long latency
func (ls *LocalStore) Get(addr Address) (chunk *Chunk, err error) {
func (ls *LocalStore) Get(ctx context.Context, addr Address) (chunk *Chunk, err error) {
ls.mu.Lock()
defer ls.mu.Unlock()
return ls.get(addr)
return ls.get(ctx, addr)
}
func (ls *LocalStore) get(addr Address) (chunk *Chunk, err error) {
chunk, err = ls.memStore.Get(addr)
func (ls *LocalStore) get(ctx context.Context, addr Address) (chunk *Chunk, err error) {
chunk, err = ls.memStore.Get(ctx, addr)
if err == nil {
if chunk.ReqC != nil {
select {
@ -177,25 +178,25 @@ func (ls *LocalStore) get(addr Address) (chunk *Chunk, err error) {
return
}
metrics.GetOrRegisterCounter("localstore.get.cachemiss", nil).Inc(1)
chunk, err = ls.DbStore.Get(addr)
chunk, err = ls.DbStore.Get(ctx, addr)
if err != nil {
metrics.GetOrRegisterCounter("localstore.get.error", nil).Inc(1)
return
}
chunk.Size = int64(binary.LittleEndian.Uint64(chunk.SData[0:8]))
ls.memStore.Put(chunk)
ls.memStore.Put(ctx, chunk)
return
}
// retrieve logic common for local and network chunk retrieval requests
func (ls *LocalStore) GetOrCreateRequest(addr Address) (chunk *Chunk, created bool) {
func (ls *LocalStore) GetOrCreateRequest(ctx context.Context, addr Address) (chunk *Chunk, created bool) {
metrics.GetOrRegisterCounter("localstore.getorcreaterequest", nil).Inc(1)
ls.mu.Lock()
defer ls.mu.Unlock()
var err error
chunk, err = ls.get(addr)
chunk, err = ls.get(ctx, addr)
if err == nil && chunk.GetErrored() == nil {
metrics.GetOrRegisterCounter("localstore.getorcreaterequest.hit", nil).Inc(1)
log.Trace(fmt.Sprintf("LocalStore.GetOrRetrieve: %v found locally", addr))
@ -210,7 +211,7 @@ func (ls *LocalStore) GetOrCreateRequest(addr Address) (chunk *Chunk, created bo
metrics.GetOrRegisterCounter("localstore.getorcreaterequest.miss", nil).Inc(1)
log.Trace(fmt.Sprintf("LocalStore.GetOrRetrieve: %v not found locally. open new request", addr))
chunk = NewChunk(addr, make(chan bool))
ls.memStore.Put(chunk)
ls.memStore.Put(ctx, chunk)
return chunk, true
}

5
swarm/storage/memstore.go
View File

@ -19,6 +19,7 @@
package storage
import (
"context"
"sync"
lru "github.com/hashicorp/golang-lru"
@ -68,7 +69,7 @@ func NewMemStore(params *StoreParams, _ *LDBStore) (m *MemStore) {
}
}
func (m *MemStore) Get(addr Address) (*Chunk, error) {
func (m *MemStore) Get(ctx context.Context, addr Address) (*Chunk, error) {
if m.disabled {
return nil, ErrChunkNotFound
}
@ -90,7 +91,7 @@ func (m *MemStore) Get(addr Address) (*Chunk, error) {
return c.(*Chunk), nil
}
func (m *MemStore) Put(c *Chunk) {
func (m *MemStore) Put(ctx context.Context, c *Chunk) {
if m.disabled {
return
}

11
swarm/storage/memstore_test.go
View File

@ -17,6 +17,7 @@
package storage
import (
"context"
"crypto/rand"
"encoding/binary"
"io/ioutil"
@ -72,7 +73,7 @@ func TestMemStoreNotFound(t *testing.T) {
m := newTestMemStore()
defer m.Close()
_, err := m.Get(ZeroAddr)
_, err := m.Get(context.TODO(), ZeroAddr)
if err != ErrChunkNotFound {
t.Errorf("Expected ErrChunkNotFound, got %v", err)
}
@ -187,8 +188,8 @@ func TestMemStoreAndLDBStore(t *testing.T) {
}
for i := 0; i < tt.n; i++ {
go ldb.Put(chunks[i])
memStore.Put(chunks[i])
go ldb.Put(context.TODO(), chunks[i])
memStore.Put(context.TODO(), chunks[i])
if got := memStore.cache.Len(); got > cacheCap {
t.Fatalf("expected to get cache capacity less than %v, but got %v", cacheCap, got)
@ -200,10 +201,10 @@ func TestMemStoreAndLDBStore(t *testing.T) {
}
for i := 0; i < tt.n; i++ {
_, err := memStore.Get(chunks[i].Addr)
_, err := memStore.Get(context.TODO(), chunks[i].Addr)
if err != nil {
if err == ErrChunkNotFound {
_, err := ldb.Get(chunks[i].Addr)
_, err := ldb.Get(context.TODO(), chunks[i].Addr)
if err != nil {
t.Fatalf("couldn't get chunk %v from ldb, got error: %v", i, err)
}

18
swarm/storage/mru/resource.go
View File

@ -125,6 +125,10 @@ type resource struct {
updated time.Time
}
func (r *resource) Context() context.Context {
return context.TODO()
}
// TODO Expire content after a defined period (to force resync)
func (r *resource) isSynced() bool {
return !r.updated.IsZero()
@ -134,7 +138,7 @@ func (r *resource) NameHash() common.Hash {
return r.nameHash
}
func (r *resource) Size(chan bool) (int64, error) {
func (r *resource) Size(context.Context, chan bool) (int64, error) {
if !r.isSynced() {
return 0, NewError(ErrNotSynced, "Not synced")
}
@ -413,7 +417,7 @@ func (h *Handler) New(ctx context.Context, name string, frequency uint64) (stora
chunk := h.newMetaChunk(name, currentblock, frequency)
h.chunkStore.Put(chunk)
h.chunkStore.Put(ctx, chunk)
log.Debug("new resource", "name", name, "key", nameHash, "startBlock", currentblock, "frequency", frequency)
// create the internal index for the resource and populate it with the data of the first version
@ -593,7 +597,7 @@ func (h *Handler) lookup(rsrc *resource, period uint32, version uint32, refresh
return nil, NewError(ErrPeriodDepth, fmt.Sprintf("Lookup exceeded max period hops (%d)", maxLookup.Max))
}
key := h.resourceHash(period, version, rsrc.nameHash)
chunk, err := h.chunkStore.GetWithTimeout(key, defaultRetrieveTimeout)
chunk, err := h.chunkStore.GetWithTimeout(context.TODO(), key, defaultRetrieveTimeout)
if err == nil {
if specificversion {
return h.updateIndex(rsrc, chunk)
@ -603,7 +607,7 @@ func (h *Handler) lookup(rsrc *resource, period uint32, version uint32, refresh
for {
newversion := version + 1
key := h.resourceHash(period, newversion, rsrc.nameHash)
newchunk, err := h.chunkStore.GetWithTimeout(key, defaultRetrieveTimeout)
newchunk, err := h.chunkStore.GetWithTimeout(context.TODO(), key, defaultRetrieveTimeout)
if err != nil {
return h.updateIndex(rsrc, chunk)
}
@ -621,8 +625,8 @@ func (h *Handler) lookup(rsrc *resource, period uint32, version uint32, refresh
// Retrieves a resource metadata chunk and creates/updates the index entry for it
// with the resulting metadata
func (h *Handler) Load(addr storage.Address) (*resource, error) {
chunk, err := h.chunkStore.GetWithTimeout(addr, defaultRetrieveTimeout)
func (h *Handler) Load(ctx context.Context, addr storage.Address) (*resource, error) {
chunk, err := h.chunkStore.GetWithTimeout(ctx, addr, defaultRetrieveTimeout)
if err != nil {
return nil, NewError(ErrNotFound, err.Error())
}
@ -890,7 +894,7 @@ func (h *Handler) update(ctx context.Context, name string, data []byte, multihas
chunk := newUpdateChunk(key, signature, nextperiod, version, name, data, datalength)
// send the chunk
h.chunkStore.Put(chunk)
h.chunkStore.Put(ctx, chunk)
log.Trace("resource update", "name", name, "key", key, "currentblock", currentblock, "lastperiod", nextperiod, "version", version, "data", chunk.SData, "multihash", multihash)
// update our resources map entry and return the new key

6
swarm/storage/mru/resource_test.go
View File

@ -182,7 +182,7 @@ func TestHandler(t *testing.T) {
t.Fatal(err)
}
chunk, err := rh.chunkStore.Get(storage.Address(rootChunkKey))
chunk, err := rh.chunkStore.Get(context.TODO(), storage.Address(rootChunkKey))
if err != nil {
t.Fatal(err)
} else if len(chunk.SData) < 16 {
@ -256,7 +256,7 @@ func TestHandler(t *testing.T) {
if err != nil {
t.Fatal(err)
}
rsrc2, err := rh2.Load(rootChunkKey)
rsrc2, err := rh2.Load(context.TODO(), rootChunkKey)
_, err = rh2.LookupLatest(ctx, nameHash, true, nil)
if err != nil {
t.Fatal(err)
@ -754,7 +754,7 @@ func newTestSigner() (*GenericSigner, error) {
}
func getUpdateDirect(rh *Handler, addr storage.Address) ([]byte, error) {
chunk, err := rh.chunkStore.Get(addr)
chunk, err := rh.chunkStore.Get(context.TODO(), addr)
if err != nil {
return nil, err
}

41
swarm/storage/netstore.go
View File

@ -17,9 +17,12 @@
package storage
import (
"context"
"time"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/spancontext"
opentracing "github.com/opentracing/opentracing-go"
)
var (
@ -43,10 +46,10 @@ var (
// access by calling network is blocking with a timeout
type NetStore struct {
localStore *LocalStore
retrieve func(chunk *Chunk) error
retrieve func(ctx context.Context, chunk *Chunk) error
}
func NewNetStore(localStore *LocalStore, retrieve func(chunk *Chunk) error) *NetStore {
func NewNetStore(localStore *LocalStore, retrieve func(ctx context.Context, chunk *Chunk) error) *NetStore {
return &NetStore{localStore, retrieve}
}
@ -56,7 +59,14 @@ func NewNetStore(localStore *LocalStore, retrieve func(chunk *Chunk) error) *Net
// Get uses get method to retrieve request, but retries if the
// ErrChunkNotFound is returned by get, until the netStoreRetryTimeout
// is reached.
func (ns *NetStore) Get(addr Address) (chunk *Chunk, err error) {
func (ns *NetStore) Get(ctx context.Context, addr Address) (chunk *Chunk, err error) {
var sp opentracing.Span
ctx, sp = spancontext.StartSpan(
ctx,
"netstore.get.global")
defer sp.Finish()
timer := time.NewTimer(netStoreRetryTimeout)
defer timer.Stop()
@ -84,7 +94,7 @@ func (ns *NetStore) Get(addr Address) (chunk *Chunk, err error) {
defer limiter.Stop()
for {
chunk, err := ns.get(addr, 0)
chunk, err := ns.get(ctx, addr, 0)
if err != ErrChunkNotFound {
// break retry only if the error is nil
// or other error then ErrChunkNotFound
@ -122,16 +132,23 @@ func (ns *NetStore) Get(addr Address) (chunk *Chunk, err error) {
}
// GetWithTimeout makes a single retrieval attempt for a chunk with a explicit timeout parameter
func (ns *NetStore) GetWithTimeout(addr Address, timeout time.Duration) (chunk *Chunk, err error) {
return ns.get(addr, timeout)
func (ns *NetStore) GetWithTimeout(ctx context.Context, addr Address, timeout time.Duration) (chunk *Chunk, err error) {
return ns.get(ctx, addr, timeout)
}
func (ns *NetStore) get(addr Address, timeout time.Duration) (chunk *Chunk, err error) {
func (ns *NetStore) get(ctx context.Context, addr Address, timeout time.Duration) (chunk *Chunk, err error) {
if timeout == 0 {
timeout = searchTimeout
}
var sp opentracing.Span
ctx, sp = spancontext.StartSpan(
ctx,
"netstore.get")
defer sp.Finish()
if ns.retrieve == nil {
chunk, err = ns.localStore.Get(addr)
chunk, err = ns.localStore.Get(ctx, addr)
if err == nil {
return chunk, nil
}
@ -140,14 +157,14 @@ func (ns *NetStore) get(addr Address, timeout time.Duration) (chunk *Chunk, err
}
} else {
var created bool
chunk, created = ns.localStore.GetOrCreateRequest(addr)
chunk, created = ns.localStore.GetOrCreateRequest(ctx, addr)
if chunk.ReqC == nil {
return chunk, nil
}
if created {
err := ns.retrieve(chunk)
err := ns.retrieve(ctx, chunk)
if err != nil {
// mark chunk request as failed so that we can retry it later
chunk.SetErrored(ErrChunkUnavailable)
@ -171,8 +188,8 @@ func (ns *NetStore) get(addr Address, timeout time.Duration) (chunk *Chunk, err
}
// Put is the entrypoint for local store requests coming from storeLoop
func (ns *NetStore) Put(chunk *Chunk) {
ns.localStore.Put(chunk)
func (ns *NetStore) Put(ctx context.Context, chunk *Chunk) {
ns.localStore.Put(ctx, chunk)
}
// Close chunk store

7
swarm/storage/netstore_test.go
View File

@ -17,6 +17,7 @@
package storage
import (
"context"
"encoding/hex"
"errors"
"io/ioutil"
@ -46,7 +47,7 @@ func newDummyChunk(addr Address) *Chunk {
return chunk
}
func (m *mockRetrieve) retrieve(chunk *Chunk) error {
func (m *mockRetrieve) retrieve(ctx context.Context, chunk *Chunk) error {
hkey := hex.EncodeToString(chunk.Addr)
m.requests[hkey] += 1
@ -100,7 +101,7 @@ func TestNetstoreFailedRequest(t *testing.T) {
// }
// second call
_, err = netStore.Get(key)
_, err = netStore.Get(context.TODO(), key)
if got := r.requests[hex.EncodeToString(key)]; got != 2 {
t.Fatalf("expected to have called retrieve two times, but got: %v", got)
}
@ -109,7 +110,7 @@ func TestNetstoreFailedRequest(t *testing.T) {
}
// third call
chunk, err := netStore.Get(key)
chunk, err := netStore.Get(context.TODO(), key)
if got := r.requests[hex.EncodeToString(key)]; got != 3 {
t.Fatalf("expected to have called retrieve three times, but got: %v", got)
}

8
swarm/storage/pyramid.go
View File

@ -287,7 +287,7 @@ func (pc *PyramidChunker) processor(id int64) {
func (pc *PyramidChunker) processChunk(id int64, job *chunkJob) {
log.Debug("pyramid.chunker: processChunk()", "id", id)
ref, err := pc.putter.Put(job.chunk)
ref, err := pc.putter.Put(context.TODO(), job.chunk)
if err != nil {
pc.errC <- err
}
@ -302,7 +302,7 @@ func (pc *PyramidChunker) processChunk(id int64, job *chunkJob) {
func (pc *PyramidChunker) loadTree() error {
log.Debug("pyramid.chunker: loadTree()")
// Get the root chunk to get the total size
chunkData, err := pc.getter.Get(Reference(pc.key))
chunkData, err := pc.getter.Get(context.TODO(), Reference(pc.key))
if err != nil {
return errLoadingTreeRootChunk
}
@ -355,7 +355,7 @@ func (pc *PyramidChunker) loadTree() error {
branchCount = int64(len(ent.chunk)-8) / pc.hashSize
for i := int64(0); i < branchCount; i++ {
key := ent.chunk[8+(i*pc.hashSize) : 8+((i+1)*pc.hashSize)]
newChunkData, err := pc.getter.Get(Reference(key))
newChunkData, err := pc.getter.Get(context.TODO(), Reference(key))
if err != nil {
return errLoadingTreeChunk
}
@ -417,7 +417,7 @@ func (pc *PyramidChunker) prepareChunks(isAppend bool) {
lastKey := parent.chunk[8+lastBranch*pc.hashSize : 8+(lastBranch+1)*pc.hashSize]
var err error
unfinishedChunkData, err = pc.getter.Get(lastKey)
unfinishedChunkData, err = pc.getter.Get(context.TODO(), lastKey)
if err != nil {
pc.errC <- err
}

13
swarm/storage/types.go
View File

@ -250,7 +250,8 @@ func GenerateRandomChunks(dataSize int64, count int) (chunks []*Chunk) {
// Size, Seek, Read, ReadAt
type LazySectionReader interface {
Size(chan bool) (int64, error)
Context() context.Context
Size(context.Context, chan bool) (int64, error)
io.Seeker
io.Reader
io.ReaderAt
@ -260,10 +261,14 @@ type LazyTestSectionReader struct {
*io.SectionReader
}
func (r *LazyTestSectionReader) Size(chan bool) (int64, error) {
func (r *LazyTestSectionReader) Size(context.Context, chan bool) (int64, error) {
return r.SectionReader.Size(), nil
}
func (r *LazyTestSectionReader) Context() context.Context {
return context.TODO()
}
type StoreParams struct {
Hash SwarmHasher `toml:"-"`
DbCapacity uint64
@ -298,7 +303,7 @@ type Reference []byte
// Putter is responsible to store data and create a reference for it
type Putter interface {
Put(ChunkData) (Reference, error)
Put(context.Context, ChunkData) (Reference, error)
// RefSize returns the length of the Reference created by this Putter
RefSize() int64
// Close is to indicate that no more chunk data will be Put on this Putter
@ -309,7 +314,7 @@ type Putter interface {
// Getter is an interface to retrieve a chunk's data by its reference
type Getter interface {
Get(Reference) (ChunkData, error)
Get(context.Context, Reference) (ChunkData, error)
}
// NOTE: this returns invalid data if chunk is encrypted

13
swarm/swarm.go
View File

@ -21,6 +21,7 @@ import (
"context"
"crypto/ecdsa"
"fmt"
"io"
"math/big"
"net"
"path/filepath"
@ -50,6 +51,7 @@ import (
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mock"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/tracing"
)
var (
@ -76,6 +78,8 @@ type Swarm struct {
lstore *storage.LocalStore // local store, needs to store for releasing resources after node stopped
sfs *fuse.SwarmFS // need this to cleanup all the active mounts on node exit
ps *pss.Pss
tracerClose io.Closer
}
type SwarmAPI struct {
@ -356,6 +360,8 @@ Start is called when the stack is started
func (self *Swarm) Start(srv *p2p.Server) error {
startTime = time.Now()
self.tracerClose = tracing.Closer
// update uaddr to correct enode
newaddr := self.bzz.UpdateLocalAddr([]byte(srv.Self().String()))
log.Warn("Updated bzz local addr", "oaddr", fmt.Sprintf("%x", newaddr.OAddr), "uaddr", fmt.Sprintf("%s", newaddr.UAddr))
@ -424,6 +430,13 @@ func (self *Swarm) updateGauges() {
// implements the node.Service interface
// stops all component services.
func (self *Swarm) Stop() error {
if self.tracerClose != nil {
err := self.tracerClose.Close()
if err != nil {
return err
}
}
if self.ps != nil {
self.ps.Stop()
}

103
swarm/tracing/tracing.go Normal file
View File

@ -0,0 +1,103 @@
package tracing
import (
"io"
"os"
"strings"
"time"
"github.com/ethereum/go-ethereum/log"
jaeger "github.com/uber/jaeger-client-go"
jaegercfg "github.com/uber/jaeger-client-go/config"
jaegerlog "github.com/uber/jaeger-client-go/log"
cli "gopkg.in/urfave/cli.v1"
)
var Enabled bool = false
// TracingEnabledFlag is the CLI flag name to use to enable trace collections.
const TracingEnabledFlag = "tracing"
var (
Closer io.Closer
)
var (
TracingFlag = cli.BoolFlag{
Name: TracingEnabledFlag,
Usage: "Enable tracing",
}
TracingEndpointFlag = cli.StringFlag{
Name: "tracing.endpoint",
Usage: "Tracing endpoint",
Value: "0.0.0.0:6831",
}
TracingSvcFlag = cli.StringFlag{
Name: "tracing.svc",
Usage: "Tracing service name",
Value: "swarm",
}
)
// Flags holds all command-line flags required for tracing collection.
var Flags = []cli.Flag{
TracingFlag,
TracingEndpointFlag,
TracingSvcFlag,
}
// Init enables or disables the open tracing system.
func init() {
for _, arg := range os.Args {
if flag := strings.TrimLeft(arg, "-"); flag == TracingEnabledFlag {
Enabled = true
}
}
}
func Setup(ctx *cli.Context) {
if Enabled {
log.Info("Enabling opentracing")
var (
endpoint = ctx.GlobalString(TracingEndpointFlag.Name)
svc = ctx.GlobalString(TracingSvcFlag.Name)
)
Closer = initTracer(endpoint, svc)
}
}
func initTracer(endpoint, svc string) (closer io.Closer) {
// Sample configuration for testing. Use constant sampling to sample every trace
// and enable LogSpan to log every span via configured Logger.
cfg := jaegercfg.Configuration{
Sampler: &jaegercfg.SamplerConfig{
Type: jaeger.SamplerTypeConst,
Param: 1,
},
Reporter: &jaegercfg.ReporterConfig{
LogSpans: true,
BufferFlushInterval: 1 * time.Second,
LocalAgentHostPort: endpoint,
},
}
// Example logger and metrics factory. Use github.com/uber/jaeger-client-go/log
// and github.com/uber/jaeger-lib/metrics respectively to bind to real logging and metrics
// frameworks.
jLogger := jaegerlog.StdLogger
//jMetricsFactory := metrics.NullFactory
// Initialize tracer with a logger and a metrics factory
closer, err := cfg.InitGlobalTracer(
svc,
jaegercfg.Logger(jLogger),
//jaegercfg.Metrics(jMetricsFactory),
//jaegercfg.Observer(rpcmetrics.NewObserver(jMetricsFactory, rpcmetrics.DefaultNameNormalizer)),
)
if err != nil {
log.Error("Could not initialize Jaeger tracer", "err", err)
}
return closer
}

21
vendor/github.com/codahale/hdrhistogram/LICENSE generated vendored Normal file
View File

@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2014 Coda Hale
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

15
vendor/github.com/codahale/hdrhistogram/README.md generated vendored Normal file
View File

@ -0,0 +1,15 @@
hdrhistogram
============
[![Build Status](https://travis-ci.org/codahale/hdrhistogram.png?branch=master)](https://travis-ci.org/codahale/hdrhistogram)
A pure Go implementation of the [HDR Histogram](https://github.com/HdrHistogram/HdrHistogram).
> A Histogram that supports recording and analyzing sampled data value counts
> across a configurable integer value range with configurable value precision
> within the range. Value precision is expressed as the number of significant
> digits in the value recording, and provides control over value quantization
> behavior across the value range and the subsequent value resolution at any
> given level.
For documentation, check [godoc](http://godoc.org/github.com/codahale/hdrhistogram).

564
vendor/github.com/codahale/hdrhistogram/hdr.go generated vendored Normal file
View File

@ -0,0 +1,564 @@
// Package hdrhistogram provides an implementation of Gil Tene's HDR Histogram
// data structure. The HDR Histogram allows for fast and accurate analysis of
// the extreme ranges of data with non-normal distributions, like latency.
package hdrhistogram
import (
"fmt"
"math"
)
// A Bracket is a part of a cumulative distribution.
type Bracket struct {
Quantile float64
Count, ValueAt int64
}
// A Snapshot is an exported view of a Histogram, useful for serializing them.
// A Histogram can be constructed from it by passing it to Import.
type Snapshot struct {
LowestTrackableValue int64
HighestTrackableValue int64
SignificantFigures int64
Counts []int64
}
// A Histogram is a lossy data structure used to record the distribution of
// non-normally distributed data (like latency) with a high degree of accuracy
// and a bounded degree of precision.
type Histogram struct {
lowestTrackableValue int64
highestTrackableValue int64
unitMagnitude int64
significantFigures int64
subBucketHalfCountMagnitude int32
subBucketHalfCount int32
subBucketMask int64
subBucketCount int32
bucketCount int32
countsLen int32
totalCount int64
counts []int64
}
// New returns a new Histogram instance capable of tracking values in the given
// range and with the given amount of precision.
func New(minValue, maxValue int64, sigfigs int) *Histogram {
if sigfigs < 1 || 5 < sigfigs {
panic(fmt.Errorf("sigfigs must be [1,5] (was %d)", sigfigs))
}
largestValueWithSingleUnitResolution := 2 * math.Pow10(sigfigs)
subBucketCountMagnitude := int32(math.Ceil(math.Log2(float64(largestValueWithSingleUnitResolution))))
subBucketHalfCountMagnitude := subBucketCountMagnitude
if subBucketHalfCountMagnitude < 1 {
subBucketHalfCountMagnitude = 1
}
subBucketHalfCountMagnitude--
unitMagnitude := int32(math.Floor(math.Log2(float64(minValue))))
if unitMagnitude < 0 {
unitMagnitude = 0
}
subBucketCount := int32(math.Pow(2, float64(subBucketHalfCountMagnitude)+1))
subBucketHalfCount := subBucketCount / 2
subBucketMask := int64(subBucketCount-1) << uint(unitMagnitude)
// determine exponent range needed to support the trackable value with no
// overflow:
smallestUntrackableValue := int64(subBucketCount) << uint(unitMagnitude)
bucketsNeeded := int32(1)
for smallestUntrackableValue < maxValue {
smallestUntrackableValue <<= 1
bucketsNeeded++
}
bucketCount := bucketsNeeded
countsLen := (bucketCount + 1) * (subBucketCount / 2)
return &Histogram{
lowestTrackableValue: minValue,
highestTrackableValue: maxValue,
unitMagnitude: int64(unitMagnitude),
significantFigures: int64(sigfigs),
subBucketHalfCountMagnitude: subBucketHalfCountMagnitude,
subBucketHalfCount: subBucketHalfCount,
subBucketMask: subBucketMask,
subBucketCount: subBucketCount,
bucketCount: bucketCount,
countsLen: countsLen,
totalCount: 0,
counts: make([]int64, countsLen),
}
}
// ByteSize returns an estimate of the amount of memory allocated to the
// histogram in bytes.
//
// N.B.: This does not take into account the overhead for slices, which are
// small, constant, and specific to the compiler version.
func (h *Histogram) ByteSize() int {
return 6*8 + 5*4 + len(h.counts)*8
}
// Merge merges the data stored in the given histogram with the receiver,
// returning the number of recorded values which had to be dropped.
func (h *Histogram) Merge(from *Histogram) (dropped int64) {
i := from.rIterator()
for i.next() {
v := i.valueFromIdx
c := i.countAtIdx
if h.RecordValues(v, c) != nil {
dropped += c
}
}
return
}
// TotalCount returns total number of values recorded.
func (h *Histogram) TotalCount() int64 {
return h.totalCount
}
// Max returns the approximate maximum recorded value.
func (h *Histogram) Max() int64 {
var max int64
i := h.iterator()
for i.next() {
if i.countAtIdx != 0 {
max = i.highestEquivalentValue
}
}
return h.highestEquivalentValue(max)
}
// Min returns the approximate minimum recorded value.
func (h *Histogram) Min() int64 {
var min int64
i := h.iterator()
for i.next() {
if i.countAtIdx != 0 && min == 0 {
min = i.highestEquivalentValue
break
}
}
return h.lowestEquivalentValue(min)
}
// Mean returns the approximate arithmetic mean of the recorded values.
func (h *Histogram) Mean() float64 {
if h.totalCount == 0 {
return 0
}
var total int64
i := h.iterator()
for i.next() {
if i.countAtIdx != 0 {
total += i.countAtIdx * h.medianEquivalentValue(i.valueFromIdx)
}
}
return float64(total) / float64(h.totalCount)
}
// StdDev returns the approximate standard deviation of the recorded values.
func (h *Histogram) StdDev() float64 {
if h.totalCount == 0 {
return 0
}
mean := h.Mean()
geometricDevTotal := 0.0
i := h.iterator()
for i.next() {
if i.countAtIdx != 0 {
dev := float64(h.medianEquivalentValue(i.valueFromIdx)) - mean
geometricDevTotal += (dev * dev) * float64(i.countAtIdx)
}
}
return math.Sqrt(geometricDevTotal / float64(h.totalCount))
}
// Reset deletes all recorded values and restores the histogram to its original
// state.
func (h *Histogram) Reset() {
h.totalCount = 0
for i := range h.counts {
h.counts[i] = 0
}
}
// RecordValue records the given value, returning an error if the value is out
// of range.
func (h *Histogram) RecordValue(v int64) error {
return h.RecordValues(v, 1)
}
// RecordCorrectedValue records the given value, correcting for stalls in the
// recording process. This only works for processes which are recording values
// at an expected interval (e.g., doing jitter analysis). Processes which are
// recording ad-hoc values (e.g., latency for incoming requests) can't take
// advantage of this.
func (h *Histogram) RecordCorrectedValue(v, expectedInterval int64) error {
if err := h.RecordValue(v); err != nil {
return err
}
if expectedInterval <= 0 || v <= expectedInterval {
return nil
}
missingValue := v - expectedInterval
for missingValue >= expectedInterval {
if err := h.RecordValue(missingValue); err != nil {
return err
}
missingValue -= expectedInterval
}
return nil
}
// RecordValues records n occurrences of the given value, returning an error if
// the value is out of range.
func (h *Histogram) RecordValues(v, n int64) error {
idx := h.countsIndexFor(v)
if idx < 0 || int(h.countsLen) <= idx {
return fmt.Errorf("value %d is too large to be recorded", v)
}
h.counts[idx] += n
h.totalCount += n
return nil
}
// ValueAtQuantile returns the recorded value at the given quantile (0..100).
func (h *Histogram) ValueAtQuantile(q float64) int64 {
if q > 100 {
q = 100
}
total := int64(0)
countAtPercentile := int64(((q / 100) * float64(h.totalCount)) + 0.5)
i := h.iterator()
for i.next() {
total += i.countAtIdx
if total >= countAtPercentile {
return h.highestEquivalentValue(i.valueFromIdx)
}
}
return 0
}
// CumulativeDistribution returns an ordered list of brackets of the
// distribution of recorded values.
func (h *Histogram) CumulativeDistribution() []Bracket {
var result []Bracket
i := h.pIterator(1)
for i.next() {
result = append(result, Bracket{
Quantile: i.percentile,
Count: i.countToIdx,
ValueAt: i.highestEquivalentValue,
})
}
return result
}
// SignificantFigures returns the significant figures used to create the
// histogram
func (h *Histogram) SignificantFigures() int64 {
return h.significantFigures
}
// LowestTrackableValue returns the lower bound on values that will be added
// to the histogram
func (h *Histogram) LowestTrackableValue() int64 {
return h.lowestTrackableValue
}
// HighestTrackableValue returns the upper bound on values that will be added
// to the histogram
func (h *Histogram) HighestTrackableValue() int64 {
return h.highestTrackableValue
}
// Histogram bar for plotting
type Bar struct {
From, To, Count int64
}
// Pretty print as csv for easy plotting
func (b Bar) String() string {
return fmt.Sprintf("%v, %v, %v\n", b.From, b.To, b.Count)
}
// Distribution returns an ordered list of bars of the
// distribution of recorded values, counts can be normalized to a probability
func (h *Histogram) Distribution() (result []Bar) {
i := h.iterator()
for i.next() {
result = append(result, Bar{
Count: i.countAtIdx,
From: h.lowestEquivalentValue(i.valueFromIdx),
To: i.highestEquivalentValue,
})
}
return result
}
// Equals returns true if the two Histograms are equivalent, false if not.
func (h *Histogram) Equals(other *Histogram) bool {
switch {
case
h.lowestTrackableValue != other.lowestTrackableValue,
h.highestTrackableValue != other.highestTrackableValue,
h.unitMagnitude != other.unitMagnitude,
h.significantFigures != other.significantFigures,
h.subBucketHalfCountMagnitude != other.subBucketHalfCountMagnitude,
h.subBucketHalfCount != other.subBucketHalfCount,
h.subBucketMask != other.subBucketMask,
h.subBucketCount != other.subBucketCount,
h.bucketCount != other.bucketCount,
h.countsLen != other.countsLen,
h.totalCount != other.totalCount:
return false
default:
for i, c := range h.counts {
if c != other.counts[i] {
return false
}
}
}
return true
}
// Export returns a snapshot view of the Histogram. This can be later passed to
// Import to construct a new Histogram with the same state.
func (h *Histogram) Export() *Snapshot {
return &Snapshot{
LowestTrackableValue: h.lowestTrackableValue,
HighestTrackableValue: h.highestTrackableValue,
SignificantFigures: h.significantFigures,
Counts: append([]int64(nil), h.counts...), // copy
}
}
// Import returns a new Histogram populated from the Snapshot data (which the
// caller must stop accessing).
func Import(s *Snapshot) *Histogram {
h := New(s.LowestTrackableValue, s.HighestTrackableValue, int(s.SignificantFigures))
h.counts = s.Counts
totalCount := int64(0)
for i := int32(0); i < h.countsLen; i++ {
countAtIndex := h.counts[i]
if countAtIndex > 0 {
totalCount += countAtIndex
}
}
h.totalCount = totalCount
return h
}
func (h *Histogram) iterator() *iterator {
return &iterator{
h: h,
subBucketIdx: -1,
}
}
func (h *Histogram) rIterator() *rIterator {
return &rIterator{
iterator: iterator{
h: h,
subBucketIdx: -1,
},
}
}
func (h *Histogram) pIterator(ticksPerHalfDistance int32) *pIterator {
return &pIterator{
iterator: iterator{
h: h,
subBucketIdx: -1,
},
ticksPerHalfDistance: ticksPerHalfDistance,
}
}
func (h *Histogram) sizeOfEquivalentValueRange(v int64) int64 {
bucketIdx := h.getBucketIndex(v)
subBucketIdx := h.getSubBucketIdx(v, bucketIdx)
adjustedBucket := bucketIdx
if subBucketIdx >= h.subBucketCount {
adjustedBucket++
}
return int64(1) << uint(h.unitMagnitude+int64(adjustedBucket))
}
func (h *Histogram) valueFromIndex(bucketIdx, subBucketIdx int32) int64 {
return int64(subBucketIdx) << uint(int64(bucketIdx)+h.unitMagnitude)
}
func (h *Histogram) lowestEquivalentValue(v int64) int64 {
bucketIdx := h.getBucketIndex(v)
subBucketIdx := h.getSubBucketIdx(v, bucketIdx)
return h.valueFromIndex(bucketIdx, subBucketIdx)
}
func (h *Histogram) nextNonEquivalentValue(v int64) int64 {
return h.lowestEquivalentValue(v) + h.sizeOfEquivalentValueRange(v)
}
func (h *Histogram) highestEquivalentValue(v int64) int64 {
return h.nextNonEquivalentValue(v) - 1
}
func (h *Histogram) medianEquivalentValue(v int64) int64 {
return h.lowestEquivalentValue(v) + (h.sizeOfEquivalentValueRange(v) >> 1)
}
func (h *Histogram) getCountAtIndex(bucketIdx, subBucketIdx int32) int64 {
return h.counts[h.countsIndex(bucketIdx, subBucketIdx)]
}
func (h *Histogram) countsIndex(bucketIdx, subBucketIdx int32) int32 {
bucketBaseIdx := (bucketIdx + 1) << uint(h.subBucketHalfCountMagnitude)
offsetInBucket := subBucketIdx - h.subBucketHalfCount
return bucketBaseIdx + offsetInBucket
}
func (h *Histogram) getBucketIndex(v int64) int32 {
pow2Ceiling := bitLen(v | h.subBucketMask)
return int32(pow2Ceiling - int64(h.unitMagnitude) -
int64(h.subBucketHalfCountMagnitude+1))
}
func (h *Histogram) getSubBucketIdx(v int64, idx int32) int32 {
return int32(v >> uint(int64(idx)+int64(h.unitMagnitude)))
}
func (h *Histogram) countsIndexFor(v int64) int {
bucketIdx := h.getBucketIndex(v)
subBucketIdx := h.getSubBucketIdx(v, bucketIdx)
return int(h.countsIndex(bucketIdx, subBucketIdx))
}
type iterator struct {
h *Histogram
bucketIdx, subBucketIdx int32
countAtIdx, countToIdx, valueFromIdx int64
highestEquivalentValue int64
}
func (i *iterator) next() bool {
if i.countToIdx >= i.h.totalCount {
return false
}
// increment bucket
i.subBucketIdx++
if i.subBucketIdx >= i.h.subBucketCount {
i.subBucketIdx = i.h.subBucketHalfCount
i.bucketIdx++
}
if i.bucketIdx >= i.h.bucketCount {
return false
}
i.countAtIdx = i.h.getCountAtIndex(i.bucketIdx, i.subBucketIdx)
i.countToIdx += i.countAtIdx
i.valueFromIdx = i.h.valueFromIndex(i.bucketIdx, i.subBucketIdx)
i.highestEquivalentValue = i.h.highestEquivalentValue(i.valueFromIdx)
return true
}
type rIterator struct {
iterator
countAddedThisStep int64
}
func (r *rIterator) next() bool {
for r.iterator.next() {
if r.countAtIdx != 0 {
r.countAddedThisStep = r.countAtIdx
return true
}
}
return false
}
type pIterator struct {
iterator
seenLastValue bool
ticksPerHalfDistance int32
percentileToIteratorTo float64
percentile float64
}
func (p *pIterator) next() bool {
if !(p.countToIdx < p.h.totalCount) {
if p.seenLastValue {
return false
}
p.seenLastValue = true
p.percentile = 100
return true
}
if p.subBucketIdx == -1 && !p.iterator.next() {
return false
}
var done = false
for !done {
currentPercentile := (100.0 * float64(p.countToIdx)) / float64(p.h.totalCount)
if p.countAtIdx != 0 && p.percentileToIteratorTo <= currentPercentile {
p.percentile = p.percentileToIteratorTo
halfDistance := math.Trunc(math.Pow(2, math.Trunc(math.Log2(100.0/(100.0-p.percentileToIteratorTo)))+1))
percentileReportingTicks := float64(p.ticksPerHalfDistance) * halfDistance
p.percentileToIteratorTo += 100.0 / percentileReportingTicks
return true
}
done = !p.iterator.next()
}
return true
}
func bitLen(x int64) (n int64) {
for ; x >= 0x8000; x >>= 16 {
n += 16
}
if x >= 0x80 {
x >>= 8
n += 8
}
if x >= 0x8 {
x >>= 4
n += 4
}
if x >= 0x2 {
x >>= 2
n += 2
}
if x >= 0x1 {
n++
}
return
}

45
vendor/github.com/codahale/hdrhistogram/window.go generated vendored Normal file
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package hdrhistogram
// A WindowedHistogram combines histograms to provide windowed statistics.
type WindowedHistogram struct {
idx int
h []Histogram
m *Histogram
Current *Histogram
}
// NewWindowed creates a new WindowedHistogram with N underlying histograms with
// the given parameters.
func NewWindowed(n int, minValue, maxValue int64, sigfigs int) *WindowedHistogram {
w := WindowedHistogram{
idx: -1,
h: make([]Histogram, n),
m: New(minValue, maxValue, sigfigs),
}
for i := range w.h {
w.h[i] = *New(minValue, maxValue, sigfigs)
}
w.Rotate()
return &w
}
// Merge returns a histogram which includes the recorded values from all the
// sections of the window.
func (w *WindowedHistogram) Merge() *Histogram {
w.m.Reset()
for _, h := range w.h {
w.m.Merge(&h)
}
return w.m
}
// Rotate resets the oldest histogram and rotates it to be used as the current
// histogram.
func (w *WindowedHistogram) Rotate() {
w.idx++
w.Current = &w.h[w.idx%len(w.h)]
w.Current.Reset()
}

14
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Changes by Version
==================
1.1.0 (unreleased)
-------------------
- Deprecate InitGlobalTracer() in favor of SetGlobalTracer()
1.0.0 (2016-09-26)
-------------------
- This release implements OpenTracing Specification 1.0 (http://opentracing.io/spec)

201
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@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
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otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
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not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
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copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
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"Contribution" shall mean any work of authorship, including
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"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
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2. Grant of Copyright License. Subject to the terms and conditions of
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You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
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the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright 2016 The OpenTracing Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

32
vendor/github.com/opentracing/opentracing-go/Makefile generated vendored Normal file
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PACKAGES := . ./mocktracer/... ./ext/...
.DEFAULT_GOAL := test-and-lint
.PHONE: test-and-lint
test-and-lint: test lint
.PHONY: test
test:
go test -v -cover -race ./...
cover:
@rm -rf cover-all.out
$(foreach pkg, $(PACKAGES), $(MAKE) cover-pkg PKG=$(pkg) || true;)
@grep mode: cover.out > coverage.out
@cat cover-all.out >> coverage.out
go tool cover -html=coverage.out -o cover.html
@rm -rf cover.out cover-all.out coverage.out
cover-pkg:
go test -coverprofile cover.out $(PKG)
@grep -v mode: cover.out >> cover-all.out
.PHONY: lint
lint:
go fmt ./...
golint ./...
@# Run again with magic to exit non-zero if golint outputs anything.
@! (golint ./... | read dummy)
go vet ./...

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[![Gitter chat](http://img.shields.io/badge/gitter-join%20chat%20%E2%86%92-brightgreen.svg)](https://gitter.im/opentracing/public) [![Build Status](https://travis-ci.org/opentracing/opentracing-go.svg?branch=master)](https://travis-ci.org/opentracing/opentracing-go) [![GoDoc](https://godoc.org/github.com/opentracing/opentracing-go?status.svg)](http://godoc.org/github.com/opentracing/opentracing-go)
[![Sourcegraph Badge](https://sourcegraph.com/github.com/opentracing/opentracing-go/-/badge.svg)](https://sourcegraph.com/github.com/opentracing/opentracing-go?badge)
# OpenTracing API for Go
This package is a Go platform API for OpenTracing.
## Required Reading
In order to understand the Go platform API, one must first be familiar with the
[OpenTracing project](http://opentracing.io) and
[terminology](http://opentracing.io/documentation/pages/spec.html) more specifically.
## API overview for those adding instrumentation
Everyday consumers of this `opentracing` package really only need to worry
about a couple of key abstractions: the `StartSpan` function, the `Span`
interface, and binding a `Tracer` at `main()`-time. Here are code snippets
demonstrating some important use cases.
#### Singleton initialization
The simplest starting point is `./default_tracer.go`. As early as possible, call
```go
import "github.com/opentracing/opentracing-go"
import ".../some_tracing_impl"
func main() {
opentracing.SetGlobalTracer(
// tracing impl specific:
some_tracing_impl.New(...),
)
...
}
```
#### Non-Singleton initialization
If you prefer direct control to singletons, manage ownership of the
`opentracing.Tracer` implementation explicitly.
#### Creating a Span given an existing Go `context.Context`
If you use `context.Context` in your application, OpenTracing's Go library will
happily rely on it for `Span` propagation. To start a new (blocking child)
`Span`, you can use `StartSpanFromContext`.
```go
func xyz(ctx context.Context, ...) {
...
span, ctx := opentracing.StartSpanFromContext(ctx, "operation_name")
defer span.Finish()
span.LogFields(
log.String("event", "soft error"),
log.String("type", "cache timeout"),
log.Int("waited.millis", 1500))
...
}
```
#### Starting an empty trace by creating a "root span"
It's always possible to create a "root" `Span` with no parent or other causal
reference.
```go
func xyz() {
...
sp := opentracing.StartSpan("operation_name")
defer sp.Finish()
...
}
```
#### Creating a (child) Span given an existing (parent) Span
```go
func xyz(parentSpan opentracing.Span, ...) {
...
sp := opentracing.StartSpan(
"operation_name",
opentracing.ChildOf(parentSpan.Context()))
defer sp.Finish()
...
}
```
#### Serializing to the wire
```go
func makeSomeRequest(ctx context.Context) ... {
if span := opentracing.SpanFromContext(ctx); span != nil {
httpClient := &http.Client{}
httpReq, _ := http.NewRequest("GET", "http://myservice/", nil)
// Transmit the span's TraceContext as HTTP headers on our
// outbound request.
opentracing.GlobalTracer().Inject(
span.Context(),
opentracing.HTTPHeaders,
opentracing.HTTPHeadersCarrier(httpReq.Header))
resp, err := httpClient.Do(httpReq)
...
}
...
}
```
#### Deserializing from the wire
```go
http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
var serverSpan opentracing.Span
appSpecificOperationName := ...
wireContext, err := opentracing.GlobalTracer().Extract(
opentracing.HTTPHeaders,
opentracing.HTTPHeadersCarrier(req.Header))
if err != nil {
// Optionally record something about err here
}
// Create the span referring to the RPC client if available.
// If wireContext == nil, a root span will be created.
serverSpan = opentracing.StartSpan(
appSpecificOperationName,
ext.RPCServerOption(wireContext))
defer serverSpan.Finish()
ctx := opentracing.ContextWithSpan(context.Background(), serverSpan)
...
}
```
#### Conditionally capture a field using `log.Noop`
In some situations, you may want to dynamically decide whether or not
to log a field. For example, you may want to capture additional data,
such as a customer ID, in non-production environments:
```go
func Customer(order *Order) log.Field {
if os.Getenv("ENVIRONMENT") == "dev" {
return log.String("customer", order.Customer.ID)
}
return log.Noop()
}
```
#### Goroutine-safety
The entire public API is goroutine-safe and does not require external
synchronization.
## API pointers for those implementing a tracing system
Tracing system implementors may be able to reuse or copy-paste-modify the `basictracer` package, found [here](https://github.com/opentracing/basictracer-go). In particular, see `basictracer.New(...)`.
## API compatibility
For the time being, "mild" backwards-incompatible changes may be made without changing the major version number. As OpenTracing and `opentracing-go` mature, backwards compatibility will become more of a priority.
## Tracer test suite
A test suite is available in the [harness](https://godoc.org/github.com/opentracing/opentracing-go/harness) package that can assist Tracer implementors to assert that their Tracer is working correctly.
## Licensing
[Apache 2.0 License](./LICENSE).

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package ext
import opentracing "github.com/opentracing/opentracing-go"
// These constants define common tag names recommended for better portability across
// tracing systems and languages/platforms.
//
// The tag names are defined as typed strings, so that in addition to the usual use
//
// span.setTag(TagName, value)
//
// they also support value type validation via this additional syntax:
//
// TagName.Set(span, value)
//
var (
//////////////////////////////////////////////////////////////////////
// SpanKind (client/server or producer/consumer)
//////////////////////////////////////////////////////////////////////
// SpanKind hints at relationship between spans, e.g. client/server
SpanKind = spanKindTagName("span.kind")
// SpanKindRPCClient marks a span representing the client-side of an RPC
// or other remote call
SpanKindRPCClientEnum = SpanKindEnum("client")
SpanKindRPCClient = opentracing.Tag{Key: string(SpanKind), Value: SpanKindRPCClientEnum}
// SpanKindRPCServer marks a span representing the server-side of an RPC
// or other remote call
SpanKindRPCServerEnum = SpanKindEnum("server")
SpanKindRPCServer = opentracing.Tag{Key: string(SpanKind), Value: SpanKindRPCServerEnum}
// SpanKindProducer marks a span representing the producer-side of a
// message bus
SpanKindProducerEnum = SpanKindEnum("producer")
SpanKindProducer = opentracing.Tag{Key: string(SpanKind), Value: SpanKindProducerEnum}
// SpanKindConsumer marks a span representing the consumer-side of a
// message bus
SpanKindConsumerEnum = SpanKindEnum("consumer")
SpanKindConsumer = opentracing.Tag{Key: string(SpanKind), Value: SpanKindConsumerEnum}
//////////////////////////////////////////////////////////////////////
// Component name
//////////////////////////////////////////////////////////////////////
// Component is a low-cardinality identifier of the module, library,
// or package that is generating a span.
Component = stringTagName("component")
//////////////////////////////////////////////////////////////////////
// Sampling hint
//////////////////////////////////////////////////////////////////////
// SamplingPriority determines the priority of sampling this Span.
SamplingPriority = uint16TagName("sampling.priority")
//////////////////////////////////////////////////////////////////////
// Peer tags. These tags can be emitted by either client-side of
// server-side to describe the other side/service in a peer-to-peer
// communications, like an RPC call.
//////////////////////////////////////////////////////////////////////
// PeerService records the service name of the peer.
PeerService = stringTagName("peer.service")
// PeerAddress records the address name of the peer. This may be a "ip:port",
// a bare "hostname", a FQDN or even a database DSN substring
// like "mysql://username@127.0.0.1:3306/dbname"
PeerAddress = stringTagName("peer.address")
// PeerHostname records the host name of the peer
PeerHostname = stringTagName("peer.hostname")
// PeerHostIPv4 records IP v4 host address of the peer
PeerHostIPv4 = ipv4Tag("peer.ipv4")
// PeerHostIPv6 records IP v6 host address of the peer
PeerHostIPv6 = stringTagName("peer.ipv6")
// PeerPort records port number of the peer
PeerPort = uint16TagName("peer.port")
//////////////////////////////////////////////////////////////////////
// HTTP Tags
//////////////////////////////////////////////////////////////////////
// HTTPUrl should be the URL of the request being handled in this segment
// of the trace, in standard URI format. The protocol is optional.
HTTPUrl = stringTagName("http.url")
// HTTPMethod is the HTTP method of the request, and is case-insensitive.
HTTPMethod = stringTagName("http.method")
// HTTPStatusCode is the numeric HTTP status code (200, 404, etc) of the
// HTTP response.
HTTPStatusCode = uint16TagName("http.status_code")
//////////////////////////////////////////////////////////////////////
// DB Tags
//////////////////////////////////////////////////////////////////////
// DBInstance is database instance name.
DBInstance = stringTagName("db.instance")
// DBStatement is a database statement for the given database type.
// It can be a query or a prepared statement (i.e., before substitution).
DBStatement = stringTagName("db.statement")
// DBType is a database type. For any SQL database, "sql".
// For others, the lower-case database category, e.g. "redis"
DBType = stringTagName("db.type")
// DBUser is a username for accessing database.
DBUser = stringTagName("db.user")
//////////////////////////////////////////////////////////////////////
// Message Bus Tag
//////////////////////////////////////////////////////////////////////
// MessageBusDestination is an address at which messages can be exchanged
MessageBusDestination = stringTagName("message_bus.destination")
//////////////////////////////////////////////////////////////////////
// Error Tag
//////////////////////////////////////////////////////////////////////
// Error indicates that operation represented by the span resulted in an error.
Error = boolTagName("error")
)
// ---
// SpanKindEnum represents common span types
type SpanKindEnum string
type spanKindTagName string
// Set adds a string tag to the `span`
func (tag spanKindTagName) Set(span opentracing.Span, value SpanKindEnum) {
span.SetTag(string(tag), value)
}
type rpcServerOption struct {
clientContext opentracing.SpanContext
}
func (r rpcServerOption) Apply(o *opentracing.StartSpanOptions) {
if r.clientContext != nil {
opentracing.ChildOf(r.clientContext).Apply(o)
}
SpanKindRPCServer.Apply(o)
}
// RPCServerOption returns a StartSpanOption appropriate for an RPC server span
// with `client` representing the metadata for the remote peer Span if available.
// In case client == nil, due to the client not being instrumented, this RPC
// server span will be a root span.
func RPCServerOption(client opentracing.SpanContext) opentracing.StartSpanOption {
return rpcServerOption{client}
}
// ---
type stringTagName string
// Set adds a string tag to the `span`
func (tag stringTagName) Set(span opentracing.Span, value string) {
span.SetTag(string(tag), value)
}
// ---
type uint32TagName string
// Set adds a uint32 tag to the `span`
func (tag uint32TagName) Set(span opentracing.Span, value uint32) {
span.SetTag(string(tag), value)
}
// ---
type uint16TagName string
// Set adds a uint16 tag to the `span`
func (tag uint16TagName) Set(span opentracing.Span, value uint16) {
span.SetTag(string(tag), value)
}
// ---
type boolTagName string
// Add adds a bool tag to the `span`
func (tag boolTagName) Set(span opentracing.Span, value bool) {
span.SetTag(string(tag), value)
}
type ipv4Tag string
// Set adds IP v4 host address of the peer as an uint32 value to the `span`, keep this for backward and zipkin compatibility
func (tag ipv4Tag) Set(span opentracing.Span, value uint32) {
span.SetTag(string(tag), value)
}
// SetString records IP v4 host address of the peer as a .-separated tuple to the `span`. E.g., "127.0.0.1"
func (tag ipv4Tag) SetString(span opentracing.Span, value string) {
span.SetTag(string(tag), value)
}

32
vendor/github.com/opentracing/opentracing-go/globaltracer.go generated vendored Normal file
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package opentracing
var (
globalTracer Tracer = NoopTracer{}
)
// SetGlobalTracer sets the [singleton] opentracing.Tracer returned by
// GlobalTracer(). Those who use GlobalTracer (rather than directly manage an
// opentracing.Tracer instance) should call SetGlobalTracer as early as
// possible in main(), prior to calling the `StartSpan` global func below.
// Prior to calling `SetGlobalTracer`, any Spans started via the `StartSpan`
// (etc) globals are noops.
func SetGlobalTracer(tracer Tracer) {
globalTracer = tracer
}
// GlobalTracer returns the global singleton `Tracer` implementation.
// Before `SetGlobalTracer()` is called, the `GlobalTracer()` is a noop
// implementation that drops all data handed to it.
func GlobalTracer() Tracer {
return globalTracer
}
// StartSpan defers to `Tracer.StartSpan`. See `GlobalTracer()`.
func StartSpan(operationName string, opts ...StartSpanOption) Span {
return globalTracer.StartSpan(operationName, opts...)
}
// InitGlobalTracer is deprecated. Please use SetGlobalTracer.
func InitGlobalTracer(tracer Tracer) {
SetGlobalTracer(tracer)
}

54
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package opentracing
import "context"
type contextKey struct{}
var activeSpanKey = contextKey{}
// ContextWithSpan returns a new `context.Context` that holds a reference to
// `span`'s SpanContext.
func ContextWithSpan(ctx context.Context, span Span) context.Context {
return context.WithValue(ctx, activeSpanKey, span)
}
// SpanFromContext returns the `Span` previously associated with `ctx`, or
// `nil` if no such `Span` could be found.
//
// NOTE: context.Context != SpanContext: the former is Go's intra-process
// context propagation mechanism, and the latter houses OpenTracing's per-Span
// identity and baggage information.
func SpanFromContext(ctx context.Context) Span {
val := ctx.Value(activeSpanKey)
if sp, ok := val.(Span); ok {
return sp
}
return nil
}
// StartSpanFromContext starts and returns a Span with `operationName`, using
// any Span found within `ctx` as a ChildOfRef. If no such parent could be
// found, StartSpanFromContext creates a root (parentless) Span.
//
// The second return value is a context.Context object built around the
// returned Span.
//
// Example usage:
//
// SomeFunction(ctx context.Context, ...) {
// sp, ctx := opentracing.StartSpanFromContext(ctx, "SomeFunction")
// defer sp.Finish()
// ...
// }
func StartSpanFromContext(ctx context.Context, operationName string, opts ...StartSpanOption) (Span, context.Context) {
return startSpanFromContextWithTracer(ctx, GlobalTracer(), operationName, opts...)
}
// startSpanFromContextWithTracer is factored out for testing purposes.
func startSpanFromContextWithTracer(ctx context.Context, tracer Tracer, operationName string, opts ...StartSpanOption) (Span, context.Context) {
if parentSpan := SpanFromContext(ctx); parentSpan != nil {
opts = append(opts, ChildOf(parentSpan.Context()))
}
span := tracer.StartSpan(operationName, opts...)
return span, ContextWithSpan(ctx, span)
}

269
vendor/github.com/opentracing/opentracing-go/log/field.go generated vendored Normal file
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package log
import (
"fmt"
"math"
)
type fieldType int
const (
stringType fieldType = iota
boolType
intType
int32Type
uint32Type
int64Type
uint64Type
float32Type
float64Type
errorType
objectType
lazyLoggerType
noopType
)
// Field instances are constructed via LogBool, LogString, and so on.
// Tracing implementations may then handle them via the Field.Marshal
// method.
//
// "heavily influenced by" (i.e., partially stolen from)
// https://github.com/uber-go/zap
type Field struct {
key string
fieldType fieldType
numericVal int64
stringVal string
interfaceVal interface{}
}
// String adds a string-valued key:value pair to a Span.LogFields() record
func String(key, val string) Field {
return Field{
key: key,
fieldType: stringType,
stringVal: val,
}
}
// Bool adds a bool-valued key:value pair to a Span.LogFields() record
func Bool(key string, val bool) Field {
var numericVal int64
if val {
numericVal = 1
}
return Field{
key: key,
fieldType: boolType,
numericVal: numericVal,
}
}
// Int adds an int-valued key:value pair to a Span.LogFields() record
func Int(key string, val int) Field {
return Field{
key: key,
fieldType: intType,
numericVal: int64(val),
}
}
// Int32 adds an int32-valued key:value pair to a Span.LogFields() record
func Int32(key string, val int32) Field {
return Field{
key: key,
fieldType: int32Type,
numericVal: int64(val),
}
}
// Int64 adds an int64-valued key:value pair to a Span.LogFields() record
func Int64(key string, val int64) Field {
return Field{
key: key,
fieldType: int64Type,
numericVal: val,
}
}
// Uint32 adds a uint32-valued key:value pair to a Span.LogFields() record
func Uint32(key string, val uint32) Field {
return Field{
key: key,
fieldType: uint32Type,
numericVal: int64(val),
}
}
// Uint64 adds a uint64-valued key:value pair to a Span.LogFields() record
func Uint64(key string, val uint64) Field {
return Field{
key: key,
fieldType: uint64Type,
numericVal: int64(val),
}
}
// Float32 adds a float32-valued key:value pair to a Span.LogFields() record
func Float32(key string, val float32) Field {
return Field{
key: key,
fieldType: float32Type,
numericVal: int64(math.Float32bits(val)),
}
}
// Float64 adds a float64-valued key:value pair to a Span.LogFields() record
func Float64(key string, val float64) Field {
return Field{
key: key,
fieldType: float64Type,
numericVal: int64(math.Float64bits(val)),
}
}
// Error adds an error with the key "error" to a Span.LogFields() record
func Error(err error) Field {
return Field{
key: "error",
fieldType: errorType,
interfaceVal: err,
}
}
// Object adds an object-valued key:value pair to a Span.LogFields() record
func Object(key string, obj interface{}) Field {
return Field{
key: key,
fieldType: objectType,
interfaceVal: obj,
}
}
// LazyLogger allows for user-defined, late-bound logging of arbitrary data
type LazyLogger func(fv Encoder)
// Lazy adds a LazyLogger to a Span.LogFields() record; the tracing
// implementation will call the LazyLogger function at an indefinite time in
// the future (after Lazy() returns).
func Lazy(ll LazyLogger) Field {
return Field{
fieldType: lazyLoggerType,
interfaceVal: ll,
}
}
// Noop creates a no-op log field that should be ignored by the tracer.
// It can be used to capture optional fields, for example those that should
// only be logged in non-production environment:
//
// func customerField(order *Order) log.Field {
// if os.Getenv("ENVIRONMENT") == "dev" {
// return log.String("customer", order.Customer.ID)
// }
// return log.Noop()
// }
//
// span.LogFields(log.String("event", "purchase"), customerField(order))
//
func Noop() Field {
return Field{
fieldType: noopType,
}
}
// Encoder allows access to the contents of a Field (via a call to
// Field.Marshal).
//
// Tracer implementations typically provide an implementation of Encoder;
// OpenTracing callers typically do not need to concern themselves with it.
type Encoder interface {
EmitString(key, value string)
EmitBool(key string, value bool)
EmitInt(key string, value int)
EmitInt32(key string, value int32)
EmitInt64(key string, value int64)
EmitUint32(key string, value uint32)
EmitUint64(key string, value uint64)
EmitFloat32(key string, value float32)
EmitFloat64(key string, value float64)
EmitObject(key string, value interface{})
EmitLazyLogger(value LazyLogger)
}
// Marshal passes a Field instance through to the appropriate
// field-type-specific method of an Encoder.
func (lf Field) Marshal(visitor Encoder) {
switch lf.fieldType {
case stringType:
visitor.EmitString(lf.key, lf.stringVal)
case boolType:
visitor.EmitBool(lf.key, lf.numericVal != 0)
case intType:
visitor.EmitInt(lf.key, int(lf.numericVal))
case int32Type:
visitor.EmitInt32(lf.key, int32(lf.numericVal))
case int64Type:
visitor.EmitInt64(lf.key, int64(lf.numericVal))
case uint32Type:
visitor.EmitUint32(lf.key, uint32(lf.numericVal))
case uint64Type:
visitor.EmitUint64(lf.key, uint64(lf.numericVal))
case float32Type:
visitor.EmitFloat32(lf.key, math.Float32frombits(uint32(lf.numericVal)))
case float64Type:
visitor.EmitFloat64(lf.key, math.Float64frombits(uint64(lf.numericVal)))
case errorType:
if err, ok := lf.interfaceVal.(error); ok {
visitor.EmitString(lf.key, err.Error())
} else {
visitor.EmitString(lf.key, "<nil>")
}
case objectType:
visitor.EmitObject(lf.key, lf.interfaceVal)
case lazyLoggerType:
visitor.EmitLazyLogger(lf.interfaceVal.(LazyLogger))
case noopType:
// intentionally left blank
}
}
// Key returns the field's key.
func (lf Field) Key() string {
return lf.key
}
// Value returns the field's value as interface{}.
func (lf Field) Value() interface{} {
switch lf.fieldType {
case stringType:
return lf.stringVal
case boolType:
return lf.numericVal != 0
case intType:
return int(lf.numericVal)
case int32Type:
return int32(lf.numericVal)
case int64Type:
return int64(lf.numericVal)
case uint32Type:
return uint32(lf.numericVal)
case uint64Type:
return uint64(lf.numericVal)
case float32Type:
return math.Float32frombits(uint32(lf.numericVal))
case float64Type:
return math.Float64frombits(uint64(lf.numericVal))
case errorType, objectType, lazyLoggerType:
return lf.interfaceVal
case noopType:
return nil
default:
return nil
}
}
// String returns a string representation of the key and value.
func (lf Field) String() string {
return fmt.Sprint(lf.key, ":", lf.Value())
}

54
vendor/github.com/opentracing/opentracing-go/log/util.go generated vendored Normal file
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package log
import "fmt"
// InterleavedKVToFields converts keyValues a la Span.LogKV() to a Field slice
// a la Span.LogFields().
func InterleavedKVToFields(keyValues ...interface{}) ([]Field, error) {
if len(keyValues)%2 != 0 {
return nil, fmt.Errorf("non-even keyValues len: %d", len(keyValues))
}
fields := make([]Field, len(keyValues)/2)
for i := 0; i*2 < len(keyValues); i++ {
key, ok := keyValues[i*2].(string)
if !ok {
return nil, fmt.Errorf(
"non-string key (pair #%d): %T",
i, keyValues[i*2])
}
switch typedVal := keyValues[i*2+1].(type) {
case bool:
fields[i] = Bool(key, typedVal)
case string:
fields[i] = String(key, typedVal)
case int:
fields[i] = Int(key, typedVal)
case int8:
fields[i] = Int32(key, int32(typedVal))
case int16:
fields[i] = Int32(key, int32(typedVal))
case int32:
fields[i] = Int32(key, typedVal)
case int64:
fields[i] = Int64(key, typedVal)
case uint:
fields[i] = Uint64(key, uint64(typedVal))
case uint64:
fields[i] = Uint64(key, typedVal)
case uint8:
fields[i] = Uint32(key, uint32(typedVal))
case uint16:
fields[i] = Uint32(key, uint32(typedVal))
case uint32:
fields[i] = Uint32(key, typedVal)
case float32:
fields[i] = Float32(key, typedVal)
case float64:
fields[i] = Float64(key, typedVal)
default:
// When in doubt, coerce to a string
fields[i] = String(key, fmt.Sprint(typedVal))
}
}
return fields, nil
}

64
vendor/github.com/opentracing/opentracing-go/noop.go generated vendored Normal file
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package opentracing
import "github.com/opentracing/opentracing-go/log"
// A NoopTracer is a trivial, minimum overhead implementation of Tracer
// for which all operations are no-ops.
//
// The primary use of this implementation is in libraries, such as RPC
// frameworks, that make tracing an optional feature controlled by the
// end user. A no-op implementation allows said libraries to use it
// as the default Tracer and to write instrumentation that does
// not need to keep checking if the tracer instance is nil.
//
// For the same reason, the NoopTracer is the default "global" tracer
// (see GlobalTracer and SetGlobalTracer functions).
//
// WARNING: NoopTracer does not support baggage propagation.
type NoopTracer struct{}
type noopSpan struct{}
type noopSpanContext struct{}
var (
defaultNoopSpanContext = noopSpanContext{}
defaultNoopSpan = noopSpan{}
defaultNoopTracer = NoopTracer{}
)
const (
emptyString = ""
)
// noopSpanContext:
func (n noopSpanContext) ForeachBaggageItem(handler func(k, v string) bool) {}
// noopSpan:
func (n noopSpan) Context() SpanContext { return defaultNoopSpanContext }
func (n noopSpan) SetBaggageItem(key, val string) Span { return defaultNoopSpan }
func (n noopSpan) BaggageItem(key string) string { return emptyString }
func (n noopSpan) SetTag(key string, value interface{}) Span { return n }
func (n noopSpan) LogFields(fields ...log.Field) {}
func (n noopSpan) LogKV(keyVals ...interface{}) {}
func (n noopSpan) Finish() {}
func (n noopSpan) FinishWithOptions(opts FinishOptions) {}
func (n noopSpan) SetOperationName(operationName string) Span { return n }
func (n noopSpan) Tracer() Tracer { return defaultNoopTracer }
func (n noopSpan) LogEvent(event string) {}
func (n noopSpan) LogEventWithPayload(event string, payload interface{}) {}
func (n noopSpan) Log(data LogData) {}
// StartSpan belongs to the Tracer interface.
func (n NoopTracer) StartSpan(operationName string, opts ...StartSpanOption) Span {
return defaultNoopSpan
}
// Inject belongs to the Tracer interface.
func (n NoopTracer) Inject(sp SpanContext, format interface{}, carrier interface{}) error {
return nil
}
// Extract belongs to the Tracer interface.
func (n NoopTracer) Extract(format interface{}, carrier interface{}) (SpanContext, error) {
return nil, ErrSpanContextNotFound
}

176
vendor/github.com/opentracing/opentracing-go/propagation.go generated vendored Normal file
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package opentracing
import (
"errors"
"net/http"
)
///////////////////////////////////////////////////////////////////////////////
// CORE PROPAGATION INTERFACES:
///////////////////////////////////////////////////////////////////////////////
var (
// ErrUnsupportedFormat occurs when the `format` passed to Tracer.Inject() or
// Tracer.Extract() is not recognized by the Tracer implementation.
ErrUnsupportedFormat = errors.New("opentracing: Unknown or unsupported Inject/Extract format")
// ErrSpanContextNotFound occurs when the `carrier` passed to
// Tracer.Extract() is valid and uncorrupted but has insufficient
// information to extract a SpanContext.
ErrSpanContextNotFound = errors.New("opentracing: SpanContext not found in Extract carrier")
// ErrInvalidSpanContext errors occur when Tracer.Inject() is asked to
// operate on a SpanContext which it is not prepared to handle (for
// example, since it was created by a different tracer implementation).
ErrInvalidSpanContext = errors.New("opentracing: SpanContext type incompatible with tracer")
// ErrInvalidCarrier errors occur when Tracer.Inject() or Tracer.Extract()
// implementations expect a different type of `carrier` than they are
// given.
ErrInvalidCarrier = errors.New("opentracing: Invalid Inject/Extract carrier")
// ErrSpanContextCorrupted occurs when the `carrier` passed to
// Tracer.Extract() is of the expected type but is corrupted.
ErrSpanContextCorrupted = errors.New("opentracing: SpanContext data corrupted in Extract carrier")
)
///////////////////////////////////////////////////////////////////////////////
// BUILTIN PROPAGATION FORMATS:
///////////////////////////////////////////////////////////////////////////////
// BuiltinFormat is used to demarcate the values within package `opentracing`
// that are intended for use with the Tracer.Inject() and Tracer.Extract()
// methods.
type BuiltinFormat byte
const (
// Binary represents SpanContexts as opaque binary data.
//
// For Tracer.Inject(): the carrier must be an `io.Writer`.
//
// For Tracer.Extract(): the carrier must be an `io.Reader`.
Binary BuiltinFormat = iota
// TextMap represents SpanContexts as key:value string pairs.
//
// Unlike HTTPHeaders, the TextMap format does not restrict the key or
// value character sets in any way.
//
// For Tracer.Inject(): the carrier must be a `TextMapWriter`.
//
// For Tracer.Extract(): the carrier must be a `TextMapReader`.
TextMap
// HTTPHeaders represents SpanContexts as HTTP header string pairs.
//
// Unlike TextMap, the HTTPHeaders format requires that the keys and values
// be valid as HTTP headers as-is (i.e., character casing may be unstable
// and special characters are disallowed in keys, values should be
// URL-escaped, etc).
//
// For Tracer.Inject(): the carrier must be a `TextMapWriter`.
//
// For Tracer.Extract(): the carrier must be a `TextMapReader`.
//
// See HTTPHeadersCarrier for an implementation of both TextMapWriter
// and TextMapReader that defers to an http.Header instance for storage.
// For example, Inject():
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// err := span.Tracer().Inject(
// span.Context(), opentracing.HTTPHeaders, carrier)
//
// Or Extract():
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// clientContext, err := tracer.Extract(
// opentracing.HTTPHeaders, carrier)
//
HTTPHeaders
)
// TextMapWriter is the Inject() carrier for the TextMap builtin format. With
// it, the caller can encode a SpanContext for propagation as entries in a map
// of unicode strings.
type TextMapWriter interface {
// Set a key:value pair to the carrier. Multiple calls to Set() for the
// same key leads to undefined behavior.
//
// NOTE: The backing store for the TextMapWriter may contain data unrelated
// to SpanContext. As such, Inject() and Extract() implementations that
// call the TextMapWriter and TextMapReader interfaces must agree on a
// prefix or other convention to distinguish their own key:value pairs.
Set(key, val string)
}
// TextMapReader is the Extract() carrier for the TextMap builtin format. With it,
// the caller can decode a propagated SpanContext as entries in a map of
// unicode strings.
type TextMapReader interface {
// ForeachKey returns TextMap contents via repeated calls to the `handler`
// function. If any call to `handler` returns a non-nil error, ForeachKey
// terminates and returns that error.
//
// NOTE: The backing store for the TextMapReader may contain data unrelated
// to SpanContext. As such, Inject() and Extract() implementations that
// call the TextMapWriter and TextMapReader interfaces must agree on a
// prefix or other convention to distinguish their own key:value pairs.
//
// The "foreach" callback pattern reduces unnecessary copying in some cases
// and also allows implementations to hold locks while the map is read.
ForeachKey(handler func(key, val string) error) error
}
// TextMapCarrier allows the use of regular map[string]string
// as both TextMapWriter and TextMapReader.
type TextMapCarrier map[string]string
// ForeachKey conforms to the TextMapReader interface.
func (c TextMapCarrier) ForeachKey(handler func(key, val string) error) error {
for k, v := range c {
if err := handler(k, v); err != nil {
return err
}
}
return nil
}
// Set implements Set() of opentracing.TextMapWriter
func (c TextMapCarrier) Set(key, val string) {
c[key] = val
}
// HTTPHeadersCarrier satisfies both TextMapWriter and TextMapReader.
//
// Example usage for server side:
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// clientContext, err := tracer.Extract(opentracing.HTTPHeaders, carrier)
//
// Example usage for client side:
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// err := tracer.Inject(
// span.Context(),
// opentracing.HTTPHeaders,
// carrier)
//
type HTTPHeadersCarrier http.Header
// Set conforms to the TextMapWriter interface.
func (c HTTPHeadersCarrier) Set(key, val string) {
h := http.Header(c)
h.Add(key, val)
}
// ForeachKey conforms to the TextMapReader interface.
func (c HTTPHeadersCarrier) ForeachKey(handler func(key, val string) error) error {
for k, vals := range c {
for _, v := range vals {
if err := handler(k, v); err != nil {
return err
}
}
}
return nil
}

189
vendor/github.com/opentracing/opentracing-go/span.go generated vendored Normal file
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package opentracing
import (
"time"
"github.com/opentracing/opentracing-go/log"
)
// SpanContext represents Span state that must propagate to descendant Spans and across process
// boundaries (e.g., a <trace_id, span_id, sampled> tuple).
type SpanContext interface {
// ForeachBaggageItem grants access to all baggage items stored in the
// SpanContext.
// The handler function will be called for each baggage key/value pair.
// The ordering of items is not guaranteed.
//
// The bool return value indicates if the handler wants to continue iterating
// through the rest of the baggage items; for example if the handler is trying to
// find some baggage item by pattern matching the name, it can return false
// as soon as the item is found to stop further iterations.
ForeachBaggageItem(handler func(k, v string) bool)
}
// Span represents an active, un-finished span in the OpenTracing system.
//
// Spans are created by the Tracer interface.
type Span interface {
// Sets the end timestamp and finalizes Span state.
//
// With the exception of calls to Context() (which are always allowed),
// Finish() must be the last call made to any span instance, and to do
// otherwise leads to undefined behavior.
Finish()
// FinishWithOptions is like Finish() but with explicit control over
// timestamps and log data.
FinishWithOptions(opts FinishOptions)
// Context() yields the SpanContext for this Span. Note that the return
// value of Context() is still valid after a call to Span.Finish(), as is
// a call to Span.Context() after a call to Span.Finish().
Context() SpanContext
// Sets or changes the operation name.
//
// Returns a reference to this Span for chaining.
SetOperationName(operationName string) Span
// Adds a tag to the span.
//
// If there is a pre-existing tag set for `key`, it is overwritten.
//
// Tag values can be numeric types, strings, or bools. The behavior of
// other tag value types is undefined at the OpenTracing level. If a
// tracing system does not know how to handle a particular value type, it
// may ignore the tag, but shall not panic.
//
// Returns a reference to this Span for chaining.
SetTag(key string, value interface{}) Span
// LogFields is an efficient and type-checked way to record key:value
// logging data about a Span, though the programming interface is a little
// more verbose than LogKV(). Here's an example:
//
// span.LogFields(
// log.String("event", "soft error"),
// log.String("type", "cache timeout"),
// log.Int("waited.millis", 1500))
//
// Also see Span.FinishWithOptions() and FinishOptions.BulkLogData.
LogFields(fields ...log.Field)
// LogKV is a concise, readable way to record key:value logging data about
// a Span, though unfortunately this also makes it less efficient and less
// type-safe than LogFields(). Here's an example:
//
// span.LogKV(
// "event", "soft error",
// "type", "cache timeout",
// "waited.millis", 1500)
//
// For LogKV (as opposed to LogFields()), the parameters must appear as
// key-value pairs, like
//
// span.LogKV(key1, val1, key2, val2, key3, val3, ...)
//
// The keys must all be strings. The values may be strings, numeric types,
// bools, Go error instances, or arbitrary structs.
//
// (Note to implementors: consider the log.InterleavedKVToFields() helper)
LogKV(alternatingKeyValues ...interface{})
// SetBaggageItem sets a key:value pair on this Span and its SpanContext
// that also propagates to descendants of this Span.
//
// SetBaggageItem() enables powerful functionality given a full-stack
// opentracing integration (e.g., arbitrary application data from a mobile
// app can make it, transparently, all the way into the depths of a storage
// system), and with it some powerful costs: use this feature with care.
//
// IMPORTANT NOTE #1: SetBaggageItem() will only propagate baggage items to
// *future* causal descendants of the associated Span.
//
// IMPORTANT NOTE #2: Use this thoughtfully and with care. Every key and
// value is copied into every local *and remote* child of the associated
// Span, and that can add up to a lot of network and cpu overhead.
//
// Returns a reference to this Span for chaining.
SetBaggageItem(restrictedKey, value string) Span
// Gets the value for a baggage item given its key. Returns the empty string
// if the value isn't found in this Span.
BaggageItem(restrictedKey string) string
// Provides access to the Tracer that created this Span.
Tracer() Tracer
// Deprecated: use LogFields or LogKV
LogEvent(event string)
// Deprecated: use LogFields or LogKV
LogEventWithPayload(event string, payload interface{})
// Deprecated: use LogFields or LogKV
Log(data LogData)
}
// LogRecord is data associated with a single Span log. Every LogRecord
// instance must specify at least one Field.
type LogRecord struct {
Timestamp time.Time
Fields []log.Field
}
// FinishOptions allows Span.FinishWithOptions callers to override the finish
// timestamp and provide log data via a bulk interface.
type FinishOptions struct {
// FinishTime overrides the Span's finish time, or implicitly becomes
// time.Now() if FinishTime.IsZero().
//
// FinishTime must resolve to a timestamp that's >= the Span's StartTime
// (per StartSpanOptions).
FinishTime time.Time
// LogRecords allows the caller to specify the contents of many LogFields()
// calls with a single slice. May be nil.
//
// None of the LogRecord.Timestamp values may be .IsZero() (i.e., they must
// be set explicitly). Also, they must be >= the Span's start timestamp and
// <= the FinishTime (or time.Now() if FinishTime.IsZero()). Otherwise the
// behavior of FinishWithOptions() is undefined.
//
// If specified, the caller hands off ownership of LogRecords at
// FinishWithOptions() invocation time.
//
// If specified, the (deprecated) BulkLogData must be nil or empty.
LogRecords []LogRecord
// BulkLogData is DEPRECATED.
BulkLogData []LogData
}
// LogData is DEPRECATED
type LogData struct {
Timestamp time.Time
Event string
Payload interface{}
}
// ToLogRecord converts a deprecated LogData to a non-deprecated LogRecord
func (ld *LogData) ToLogRecord() LogRecord {
var literalTimestamp time.Time
if ld.Timestamp.IsZero() {
literalTimestamp = time.Now()
} else {
literalTimestamp = ld.Timestamp
}
rval := LogRecord{
Timestamp: literalTimestamp,
}
if ld.Payload == nil {
rval.Fields = []log.Field{
log.String("event", ld.Event),
}
} else {
rval.Fields = []log.Field{
log.String("event", ld.Event),
log.Object("payload", ld.Payload),
}
}
return rval
}

305
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package opentracing
import "time"
// Tracer is a simple, thin interface for Span creation and SpanContext
// propagation.
type Tracer interface {
// Create, start, and return a new Span with the given `operationName` and
// incorporate the given StartSpanOption `opts`. (Note that `opts` borrows
// from the "functional options" pattern, per
// http://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis)
//
// A Span with no SpanReference options (e.g., opentracing.ChildOf() or
// opentracing.FollowsFrom()) becomes the root of its own trace.
//
// Examples:
//
// var tracer opentracing.Tracer = ...
//
// // The root-span case:
// sp := tracer.StartSpan("GetFeed")
//
// // The vanilla child span case:
// sp := tracer.StartSpan(
// "GetFeed",
// opentracing.ChildOf(parentSpan.Context()))
//
// // All the bells and whistles:
// sp := tracer.StartSpan(
// "GetFeed",
// opentracing.ChildOf(parentSpan.Context()),
// opentracing.Tag{"user_agent", loggedReq.UserAgent},
// opentracing.StartTime(loggedReq.Timestamp),
// )
//
StartSpan(operationName string, opts ...StartSpanOption) Span
// Inject() takes the `sm` SpanContext instance and injects it for
// propagation within `carrier`. The actual type of `carrier` depends on
// the value of `format`.
//
// OpenTracing defines a common set of `format` values (see BuiltinFormat),
// and each has an expected carrier type.
//
// Other packages may declare their own `format` values, much like the keys
// used by `context.Context` (see
// https://godoc.org/golang.org/x/net/context#WithValue).
//
// Example usage (sans error handling):
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// err := tracer.Inject(
// span.Context(),
// opentracing.HTTPHeaders,
// carrier)
//
// NOTE: All opentracing.Tracer implementations MUST support all
// BuiltinFormats.
//
// Implementations may return opentracing.ErrUnsupportedFormat if `format`
// is not supported by (or not known by) the implementation.
//
// Implementations may return opentracing.ErrInvalidCarrier or any other
// implementation-specific error if the format is supported but injection
// fails anyway.
//
// See Tracer.Extract().
Inject(sm SpanContext, format interface{}, carrier interface{}) error
// Extract() returns a SpanContext instance given `format` and `carrier`.
//
// OpenTracing defines a common set of `format` values (see BuiltinFormat),
// and each has an expected carrier type.
//
// Other packages may declare their own `format` values, much like the keys
// used by `context.Context` (see
// https://godoc.org/golang.org/x/net/context#WithValue).
//
// Example usage (with StartSpan):
//
//
// carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
// clientContext, err := tracer.Extract(opentracing.HTTPHeaders, carrier)
//
// // ... assuming the ultimate goal here is to resume the trace with a
// // server-side Span:
// var serverSpan opentracing.Span
// if err == nil {
// span = tracer.StartSpan(
// rpcMethodName, ext.RPCServerOption(clientContext))
// } else {
// span = tracer.StartSpan(rpcMethodName)
// }
//
//
// NOTE: All opentracing.Tracer implementations MUST support all
// BuiltinFormats.
//
// Return values:
// - A successful Extract returns a SpanContext instance and a nil error
// - If there was simply no SpanContext to extract in `carrier`, Extract()
// returns (nil, opentracing.ErrSpanContextNotFound)
// - If `format` is unsupported or unrecognized, Extract() returns (nil,
// opentracing.ErrUnsupportedFormat)
// - If there are more fundamental problems with the `carrier` object,
// Extract() may return opentracing.ErrInvalidCarrier,
// opentracing.ErrSpanContextCorrupted, or implementation-specific
// errors.
//
// See Tracer.Inject().
Extract(format interface{}, carrier interface{}) (SpanContext, error)
}
// StartSpanOptions allows Tracer.StartSpan() callers and implementors a
// mechanism to override the start timestamp, specify Span References, and make
// a single Tag or multiple Tags available at Span start time.
//
// StartSpan() callers should look at the StartSpanOption interface and
// implementations available in this package.
//
// Tracer implementations can convert a slice of `StartSpanOption` instances
// into a `StartSpanOptions` struct like so:
//
// func StartSpan(opName string, opts ...opentracing.StartSpanOption) {
// sso := opentracing.StartSpanOptions{}
// for _, o := range opts {
// o.Apply(&sso)
// }
// ...
// }
//
type StartSpanOptions struct {
// Zero or more causal references to other Spans (via their SpanContext).
// If empty, start a "root" Span (i.e., start a new trace).
References []SpanReference
// StartTime overrides the Span's start time, or implicitly becomes
// time.Now() if StartTime.IsZero().
StartTime time.Time
// Tags may have zero or more entries; the restrictions on map values are
// identical to those for Span.SetTag(). May be nil.
//
// If specified, the caller hands off ownership of Tags at
// StartSpan() invocation time.
Tags map[string]interface{}
}
// StartSpanOption instances (zero or more) may be passed to Tracer.StartSpan.
//
// StartSpanOption borrows from the "functional options" pattern, per
// http://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis
type StartSpanOption interface {
Apply(*StartSpanOptions)
}
// SpanReferenceType is an enum type describing different categories of
// relationships between two Spans. If Span-2 refers to Span-1, the
// SpanReferenceType describes Span-1 from Span-2's perspective. For example,
// ChildOfRef means that Span-1 created Span-2.
//
// NOTE: Span-1 and Span-2 do *not* necessarily depend on each other for
// completion; e.g., Span-2 may be part of a background job enqueued by Span-1,
// or Span-2 may be sitting in a distributed queue behind Span-1.
type SpanReferenceType int
const (
// ChildOfRef refers to a parent Span that caused *and* somehow depends
// upon the new child Span. Often (but not always), the parent Span cannot
// finish until the child Span does.
//
// An timing diagram for a ChildOfRef that's blocked on the new Span:
//
// [-Parent Span---------]
// [-Child Span----]
//
// See http://opentracing.io/spec/
//
// See opentracing.ChildOf()
ChildOfRef SpanReferenceType = iota
// FollowsFromRef refers to a parent Span that does not depend in any way
// on the result of the new child Span. For instance, one might use
// FollowsFromRefs to describe pipeline stages separated by queues,
// or a fire-and-forget cache insert at the tail end of a web request.
//
// A FollowsFromRef Span is part of the same logical trace as the new Span:
// i.e., the new Span is somehow caused by the work of its FollowsFromRef.
//
// All of the following could be valid timing diagrams for children that
// "FollowFrom" a parent.
//
// [-Parent Span-] [-Child Span-]
//
//
// [-Parent Span--]
// [-Child Span-]
//
//
// [-Parent Span-]
// [-Child Span-]
//
// See http://opentracing.io/spec/
//
// See opentracing.FollowsFrom()
FollowsFromRef
)
// SpanReference is a StartSpanOption that pairs a SpanReferenceType and a
// referenced SpanContext. See the SpanReferenceType documentation for
// supported relationships. If SpanReference is created with
// ReferencedContext==nil, it has no effect. Thus it allows for a more concise
// syntax for starting spans:
//
// sc, _ := tracer.Extract(someFormat, someCarrier)
// span := tracer.StartSpan("operation", opentracing.ChildOf(sc))
//
// The `ChildOf(sc)` option above will not panic if sc == nil, it will just
// not add the parent span reference to the options.
type SpanReference struct {
Type SpanReferenceType
ReferencedContext SpanContext
}
// Apply satisfies the StartSpanOption interface.
func (r SpanReference) Apply(o *StartSpanOptions) {
if r.ReferencedContext != nil {
o.References = append(o.References, r)
}
}
// ChildOf returns a StartSpanOption pointing to a dependent parent span.
// If sc == nil, the option has no effect.
//
// See ChildOfRef, SpanReference
func ChildOf(sc SpanContext) SpanReference {
return SpanReference{
Type: ChildOfRef,
ReferencedContext: sc,
}
}
// FollowsFrom returns a StartSpanOption pointing to a parent Span that caused
// the child Span but does not directly depend on its result in any way.
// If sc == nil, the option has no effect.
//
// See FollowsFromRef, SpanReference
func FollowsFrom(sc SpanContext) SpanReference {
return SpanReference{
Type: FollowsFromRef,
ReferencedContext: sc,
}
}
// StartTime is a StartSpanOption that sets an explicit start timestamp for the
// new Span.
type StartTime time.Time
// Apply satisfies the StartSpanOption interface.
func (t StartTime) Apply(o *StartSpanOptions) {
o.StartTime = time.Time(t)
}
// Tags are a generic map from an arbitrary string key to an opaque value type.
// The underlying tracing system is responsible for interpreting and
// serializing the values.
type Tags map[string]interface{}
// Apply satisfies the StartSpanOption interface.
func (t Tags) Apply(o *StartSpanOptions) {
if o.Tags == nil {
o.Tags = make(map[string]interface{})
}
for k, v := range t {
o.Tags[k] = v
}
}
// Tag may be passed as a StartSpanOption to add a tag to new spans,
// or its Set method may be used to apply the tag to an existing Span,
// for example:
//
// tracer.StartSpan("opName", Tag{"Key", value})
//
// or
//
// Tag{"key", value}.Set(span)
type Tag struct {
Key string
Value interface{}
}
// Apply satisfies the StartSpanOption interface.
func (t Tag) Apply(o *StartSpanOptions) {
if o.Tags == nil {
o.Tags = make(map[string]interface{})
}
o.Tags[t.Key] = t.Value
}
// Set applies the tag to an existing Span.
func (t Tag) Set(s Span) {
s.SetTag(t.Key, t.Value)
}

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Changes by Version
==================
2.15.0 (unreleased)
-------------------
- nothing yet
2.14.0 (2018-04-30)
-------------------
- Support throttling for debug traces (#274) <Isaac Hier>
- Remove dependency on Apache Thrift (#303) <Yuri Shkuro>
- Remove dependency on tchannel (#295) (#294) <Yuri Shkuro>
- Test with Go 1.9 (#298) <Yuri Shkuro>
2.13.0 (2018-04-15)
-------------------
- Use value receiver for config.NewTracer() (#283) <Yuri Shkuro>
- Lock span during jaeger thrift conversion (#273) <Won Jun Jang>
- Fix the RemotelyControlledSampler so that it terminates go-routine on Close() (#260) <Scott Kidder> <Yuri Shkuro>
- Added support for client configuration via env vars (#275) <Juraci Paixão Kröhling>
- Allow overriding sampler in the Config (#270) <Mike Kabischev>
2.12.0 (2018-03-14)
-------------------
- Use lock when retrieving span.Context() (#268)
- Add Configuration support for custom Injector and Extractor (#263) <Martin Liu>
2.11.2 (2018-01-12)
-------------------
- Add Gopkg.toml to allow using the lib with `dep`
2.11.1 (2018-01-03)
-------------------
- Do not enqueue spans after Reporter is closed (#235, #245)
- Change default flush interval to 1sec (#243)
2.11.0 (2017-11-27)
-------------------
- Normalize metric names and tags to be compatible with Prometheus (#222)
2.10.0 (2017-11-14)
-------------------
- Support custom tracing headers (#176)
- Add BaggageRestrictionManager (#178) and RemoteBaggageRestrictionManager (#182)
- Do not coerce baggage keys to lower case (#196)
- Log span name when span cannot be reported (#198)
- Add option to enable gen128Bit for tracer (#193) and allow custom generator for high bits of trace ID (#219)
2.9.0 (2017-07-29)
------------------
- Pin thrift <= 0.10 (#179)
- Introduce a parallel interface ContribObserver (#159)
2.8.0 (2017-07-05)
------------------
- Drop `jaeger.` prefix from `jaeger.hostname` process-level tag
- Add options to set tracer tags
2.7.0 (2017-06-21)
------------------
- Fix rate limiter balance [#135](https://github.com/uber/jaeger-client-go/pull/135) [#140](https://github.com/uber/jaeger-client-go/pull/140)
- Default client to send Jaeger.thrift [#147](https://github.com/uber/jaeger-client-go/pull/147)
- Save baggage in span [#153](https://github.com/uber/jaeger-client-go/pull/153)
- Move reporter.queueLength to the top of the struct to guarantee 64bit alignment [#158](https://github.com/uber/jaeger-client-go/pull/158)
- Support HTTP transport with jaeger.thrift [#161](https://github.com/uber/jaeger-client-go/pull/161)
2.6.0 (2017-03-28)
------------------
- Add config option to initialize RPC Metrics feature
2.5.0 (2017-03-23)
------------------
- Split request latency metric by success/failure [#123](https://github.com/uber/jaeger-client-go/pull/123)
- Add mutex to adaptive sampler and fix race condition [#124](https://github.com/uber/jaeger-client-go/pull/124)
- Fix rate limiter panic [#125](https://github.com/uber/jaeger-client-go/pull/125)
2.4.0 (2017-03-21)
------------------
- Remove `_ms` suffix from request latency metric name [#121](https://github.com/uber/jaeger-client-go/pull/121)
- Rename all metrics to "request" and "http_request" and use tags for other dimensions [#121](https://github.com/uber/jaeger-client-go/pull/121)
2.3.0 (2017-03-20)
------------------
- Make Span type public to allow access to non-std methods for testing [#117](https://github.com/uber/jaeger-client-go/pull/117)
- Add a structured way to extract traces for logging with zap [#118](https://github.com/uber/jaeger-client-go/pull/118)
2.2.1 (2017-03-14)
------------------
- Fix panic caused by updating the remote sampler from adaptive sampler to any other sampler type (https://github.com/uber/jaeger-client-go/pull/111)
2.2.0 (2017-03-10)
------------------
- Introduce Observer and SpanObserver (https://github.com/uber/jaeger-client-go/pull/94)
- Add RPC metrics emitter as Observer/SpanObserver (https://github.com/uber/jaeger-client-go/pull/103)
2.1.2 (2017-02-27)
-------------------
- Fix leaky bucket bug (https://github.com/uber/jaeger-client-go/pull/99)
- Fix zap logger Infof (https://github.com/uber/jaeger-client-go/pull/100)
- Add tracer initialization godoc examples
2.1.1 (2017-02-21)
-------------------
- Fix inefficient usage of zap.Logger
2.1.0 (2017-02-17)
-------------------
- Add adapter for zap.Logger (https://github.com/uber-go/zap)
- Move logging API to ./log/ package
2.0.0 (2017-02-08)
-------------------
- Support Adaptive Sampling
- Support 128bit Trace IDs
- Change trace/span IDs from uint64 to strong types TraceID and SpanID
- Add Zipkin HTTP B3 Propagation format support #72
- Rip out existing metrics and use github.com/uber/jaeger-lib/metrics
- Change API for tracer, reporter, sampler initialization
1.6.0 (2016-10-14)
-------------------
- Add Zipkin HTTP transport
- Support external baggage via jaeger-baggage header
- Unpin Thrift version, keep to master
1.5.1 (2016-09-27)
-------------------
- Relax dependency on opentracing to ^1
1.5.0 (2016-09-27)
-------------------
- Upgrade to opentracing-go 1.0
- Support KV logging for Spans
1.4.0 (2016-09-14)
-------------------
- Support debug traces via HTTP header "jaeger-debug-id"

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# How to Contribute to Jaeger
We'd love your help!
Jaeger is [Apache 2.0 licensed](LICENSE) and accepts contributions via GitHub
pull requests. This document outlines some of the conventions on development
workflow, commit message formatting, contact points and other resources to make
it easier to get your contribution accepted.
We gratefully welcome improvements to documentation as well as to code.
# Certificate of Origin
By contributing to this project you agree to the [Developer Certificate of
Origin](https://developercertificate.org/) (DCO). This document was created
by the Linux Kernel community and is a simple statement that you, as a
contributor, have the legal right to make the contribution. See the [DCO](DCO)
file for details.
## Getting Started
This library uses [glide](https://github.com/Masterminds/glide) to manage dependencies.
To get started, make sure you clone the Git repository into the correct location
`github.com/uber/jaeger-client-go` relative to `$GOPATH`:
```
mkdir -p $GOPATH/src/github.com/uber
cd $GOPATH/src/github.com/uber
git clone git@github.com:jaegertracing/jaeger-client-go.git jaeger-client-go
cd jaeger-client-go
```
Then install dependencies and run the tests:
```
git submodule update --init --recursive
glide install
make test
```
## Imports grouping
This projects follows the following pattern for grouping imports in Go files:
* imports from standard library
* imports from other projects
* imports from `jaeger-client-go` project
For example:
```go
import (
"fmt"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
"github.com/uber/jaeger-client-go/config"
)
```
## Making A Change
*Before making any significant changes, please [open an
issue](https://github.com/jaegertracing/jaeger-client-go/issues).* Discussing your proposed
changes ahead of time will make the contribution process smooth for everyone.
Once we've discussed your changes and you've got your code ready, make sure
that tests are passing (`make test` or `make cover`) and open your PR. Your
pull request is most likely to be accepted if it:
* Includes tests for new functionality.
* Follows the guidelines in [Effective
Go](https://golang.org/doc/effective_go.html) and the [Go team's common code
review comments](https://github.com/golang/go/wiki/CodeReviewComments).
* Has a [good commit message](https://chris.beams.io/posts/git-commit/):
* Separate subject from body with a blank line
* Limit the subject line to 50 characters
* Capitalize the subject line
* Do not end the subject line with a period
* Use the imperative mood in the subject line
* Wrap the body at 72 characters
* Use the body to explain _what_ and _why_ instead of _how_
* Each commit must be signed by the author ([see below](#sign-your-work)).
## License
By contributing your code, you agree to license your contribution under the terms
of the [Apache License](LICENSE).
If you are adding a new file it should have a header like below. The easiest
way to add such header is to run `make fmt`.
```
// Copyright (c) 2017 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
```
## Sign your work
The sign-off is a simple line at the end of the explanation for the
patch, which certifies that you wrote it or otherwise have the right to
pass it on as an open-source patch. The rules are pretty simple: if you
can certify the below (from
[developercertificate.org](http://developercertificate.org/)):
```
Developer Certificate of Origin
Version 1.1
Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
660 York Street, Suite 102,
San Francisco, CA 94110 USA
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.
```
then you just add a line to every git commit message:
Signed-off-by: Joe Smith <joe@gmail.com>
using your real name (sorry, no pseudonyms or anonymous contributions.)
You can add the sign off when creating the git commit via `git commit -s`.
If you want this to be automatic you can set up some aliases:
```
git config --add alias.amend "commit -s --amend"
git config --add alias.c "commit -s"
```

37
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Developer Certificate of Origin
Version 1.1
Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
660 York Street, Suite 102,
San Francisco, CA 94110 USA
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.

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# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
[[projects]]
branch = "master"
name = "github.com/beorn7/perks"
packages = ["quantile"]
revision = "3a771d992973f24aa725d07868b467d1ddfceafb"
[[projects]]
branch = "master"
name = "github.com/codahale/hdrhistogram"
packages = ["."]
revision = "3a0bb77429bd3a61596f5e8a3172445844342120"
[[projects]]
branch = "master"
name = "github.com/crossdock/crossdock-go"
packages = [
".",
"assert",
"require"
]
revision = "049aabb0122b03bc9bd30cab8f3f91fb60166361"
[[projects]]
name = "github.com/davecgh/go-spew"
packages = ["spew"]
revision = "346938d642f2ec3594ed81d874461961cd0faa76"
version = "v1.1.0"
[[projects]]
name = "github.com/golang/protobuf"
packages = ["proto"]
revision = "925541529c1fa6821df4e44ce2723319eb2be768"
version = "v1.0.0"
[[projects]]
name = "github.com/matttproud/golang_protobuf_extensions"
packages = ["pbutil"]
revision = "3247c84500bff8d9fb6d579d800f20b3e091582c"
version = "v1.0.0"
[[projects]]
name = "github.com/opentracing/opentracing-go"
packages = [
".",
"ext",
"log"
]
revision = "1949ddbfd147afd4d964a9f00b24eb291e0e7c38"
version = "v1.0.2"
[[projects]]
name = "github.com/pkg/errors"
packages = ["."]
revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
version = "v0.8.0"
[[projects]]
name = "github.com/pmezard/go-difflib"
packages = ["difflib"]
revision = "792786c7400a136282c1664665ae0a8db921c6c2"
version = "v1.0.0"
[[projects]]
name = "github.com/prometheus/client_golang"
packages = ["prometheus"]
revision = "c5b7fccd204277076155f10851dad72b76a49317"
version = "v0.8.0"
[[projects]]
branch = "master"
name = "github.com/prometheus/client_model"
packages = ["go"]
revision = "99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c"
[[projects]]
branch = "master"
name = "github.com/prometheus/common"
packages = [
"expfmt",
"internal/bitbucket.org/ww/goautoneg",
"model"
]
revision = "d811d2e9bf898806ecfb6ef6296774b13ffc314c"
[[projects]]
branch = "master"
name = "github.com/prometheus/procfs"
packages = [
".",
"internal/util",
"nfs",
"xfs"
]
revision = "8b1c2da0d56deffdbb9e48d4414b4e674bd8083e"
[[projects]]
name = "github.com/stretchr/testify"
packages = [
"assert",
"require",
"suite"
]
revision = "12b6f73e6084dad08a7c6e575284b177ecafbc71"
version = "v1.2.1"
[[projects]]
name = "github.com/uber-go/atomic"
packages = ["."]
revision = "8474b86a5a6f79c443ce4b2992817ff32cf208b8"
version = "v1.3.1"
[[projects]]
name = "github.com/uber/jaeger-lib"
packages = [
"metrics",
"metrics/prometheus",
"metrics/testutils"
]
revision = "4267858c0679cd4e47cefed8d7f70fd386cfb567"
version = "v1.4.0"
[[projects]]
name = "go.uber.org/atomic"
packages = ["."]
revision = "54f72d32435d760d5604f17a82e2435b28dc4ba5"
version = "v1.3.0"
[[projects]]
name = "go.uber.org/multierr"
packages = ["."]
revision = "3c4937480c32f4c13a875a1829af76c98ca3d40a"
version = "v1.1.0"
[[projects]]
name = "go.uber.org/zap"
packages = [
".",
"buffer",
"internal/bufferpool",
"internal/color",
"internal/exit",
"zapcore"
]
revision = "eeedf312bc6c57391d84767a4cd413f02a917974"
version = "v1.8.0"
[[projects]]
branch = "master"
name = "golang.org/x/net"
packages = [
"context",
"context/ctxhttp"
]
revision = "5f9ae10d9af5b1c89ae6904293b14b064d4ada23"
[solve-meta]
analyzer-name = "dep"
analyzer-version = 1
inputs-digest = "f9dcfaf37a785c5dac1e20c29605eda29a83ba9c6f8842e92960dc94c8c4ff80"
solver-name = "gps-cdcl"
solver-version = 1

27
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@ -0,0 +1,27 @@
[[constraint]]
name = "github.com/crossdock/crossdock-go"
branch = "master"
[[constraint]]
name = "github.com/opentracing/opentracing-go"
version = "^1"
[[constraint]]
name = "github.com/prometheus/client_golang"
version = "0.8.0"
[[constraint]]
name = "github.com/stretchr/testify"
version = "^1.1.3"
[[constraint]]
name = "github.com/uber-go/atomic"
version = "^1"
[[constraint]]
name = "github.com/uber/jaeger-lib"
version = "^1.3"
[[constraint]]
name = "go.uber.org/zap"
version = "^1"

201
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@ -0,0 +1,201 @@
Apache License
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117
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@ -0,0 +1,117 @@
PROJECT_ROOT=github.com/uber/jaeger-client-go
PACKAGES := $(shell glide novendor | grep -v -e ./thrift-gen/... -e ./thrift/...)
# all .go files that don't exist in hidden directories
ALL_SRC := $(shell find . -name "*.go" | grep -v -e vendor -e thrift-gen -e ./thrift/ \
-e ".*/\..*" \
-e ".*/_.*" \
-e ".*/mocks.*")
-include crossdock/rules.mk
export GO15VENDOREXPERIMENT=1
RACE=-race
GOTEST=go test -v $(RACE)
GOLINT=golint
GOVET=go vet
GOFMT=gofmt
FMT_LOG=fmt.log
LINT_LOG=lint.log
THRIFT_VER=0.9.3
THRIFT_IMG=thrift:$(THRIFT_VER)
THRIFT=docker run -v "${PWD}:/data" $(THRIFT_IMG) thrift
THRIFT_GO_ARGS=thrift_import="github.com/apache/thrift/lib/go/thrift"
THRIFT_GEN_DIR=thrift-gen
PASS=$(shell printf "\033[32mPASS\033[0m")
FAIL=$(shell printf "\033[31mFAIL\033[0m")
COLORIZE=sed ''/PASS/s//$(PASS)/'' | sed ''/FAIL/s//$(FAIL)/''
.DEFAULT_GOAL := test-and-lint
.PHONY: test-and-lint
test-and-lint: test fmt lint
.PHONY: test
test:
bash -c "set -e; set -o pipefail; $(GOTEST) $(PACKAGES) | $(COLORIZE)"
.PHONY: fmt
fmt:
$(GOFMT) -e -s -l -w $(ALL_SRC)
./scripts/updateLicenses.sh
.PHONY: lint
lint:
$(GOVET) $(PACKAGES)
@cat /dev/null > $(LINT_LOG)
@$(foreach pkg, $(PACKAGES), $(GOLINT) $(pkg) | grep -v crossdock/thrift >> $(LINT_LOG) || true;)
@[ ! -s "$(LINT_LOG)" ] || (echo "Lint Failures" | cat - $(LINT_LOG) && false)
@$(GOFMT) -e -s -l $(ALL_SRC) > $(FMT_LOG)
./scripts/updateLicenses.sh >> $(FMT_LOG)
@[ ! -s "$(FMT_LOG)" ] || (echo "go fmt or license check failures, run 'make fmt'" | cat - $(FMT_LOG) && false)
.PHONY: install
install:
glide --version || go get github.com/Masterminds/glide
ifeq ($(USE_DEP),true)
dep ensure
else
glide install
endif
.PHONY: cover
cover:
./scripts/cover.sh $(shell go list $(PACKAGES))
go tool cover -html=cover.out -o cover.html
# This is not part of the regular test target because we don't want to slow it
# down.
.PHONY: test-examples
test-examples:
make -C examples
# TODO at the moment we're not generating tchan_*.go files
thrift: idl-submodule thrift-image
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/agent.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/sampling.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/jaeger.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/zipkincore.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/baggage.thrift
$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/crossdock/thrift/ /data/idl/thrift/crossdock/tracetest.thrift
sed -i '' 's|"zipkincore"|"$(PROJECT_ROOT)/thrift-gen/zipkincore"|g' $(THRIFT_GEN_DIR)/agent/*.go
sed -i '' 's|"jaeger"|"$(PROJECT_ROOT)/thrift-gen/jaeger"|g' $(THRIFT_GEN_DIR)/agent/*.go
sed -i '' 's|"github.com/apache/thrift/lib/go/thrift"|"github.com/uber/jaeger-client-go/thrift"|g' \
$(THRIFT_GEN_DIR)/*/*.go crossdock/thrift/tracetest/*.go
rm -rf thrift-gen/*/*-remote
rm -rf crossdock/thrift/*/*-remote
rm -rf thrift-gen/jaeger/collector.go
idl-submodule:
git submodule init
git submodule update
thrift-image:
$(THRIFT) -version
.PHONY: install-dep-ci
install-dep-ci:
- curl -L -s https://github.com/golang/dep/releases/download/v0.3.2/dep-linux-amd64 -o $$GOPATH/bin/dep
- chmod +x $$GOPATH/bin/dep
.PHONY: install-ci
install-ci: install-dep-ci install
go get github.com/wadey/gocovmerge
go get github.com/mattn/goveralls
go get golang.org/x/tools/cmd/cover
go get github.com/golang/lint/golint
.PHONY: test-ci
test-ci:
@./scripts/cover.sh $(shell go list $(PACKAGES))
make lint

260
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@ -0,0 +1,260 @@
[![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov] [![OpenTracing 1.0 Enabled][ot-img]][ot-url]
# Jaeger Bindings for Go OpenTracing API
Instrumentation library that implements an
[OpenTracing](http://opentracing.io) Tracer for Jaeger (https://jaegertracing.io).
**IMPORTANT**: The library's import path is based on its original location under `github.com/uber`. Do not try to import it as `github.com/jaegertracing`, it will not compile. We might revisit this in the next major release.
* :white_check_mark: `import "github.com/uber/jaeger-client-go"`
* :x: `import "github.com/jaegertracing/jaeger-client-go"`
## How to Contribute
Please see [CONTRIBUTING.md](CONTRIBUTING.md).
## Installation
We recommended using a dependency manager like [glide](https://github.com/Masterminds/glide)
and [semantic versioning](http://semver.org/) when including this library into an application.
For example, Jaeger backend imports this library like this:
```yaml
- package: github.com/uber/jaeger-client-go
version: ^2.7.0
```
If you instead want to use the latest version in `master`, you can pull it via `go get`.
Note that during `go get` you may see build errors due to incompatible dependencies, which is why
we recommend using semantic versions for dependencies. The error may be fixed by running
`make install` (it will install `glide` if you don't have it):
```shell
go get -u github.com/uber/jaeger-client-go/
cd $GOPATH/src/github.com/uber/jaeger-client-go/
git submodule update --init --recursive
make install
```
## Initialization
See tracer initialization examples in [godoc](https://godoc.org/github.com/uber/jaeger-client-go/config#pkg-examples)
and [config/example_test.go](./config/example_test.go).
### Environment variables
The tracer can be initialized with values coming from environment variables. None of the env vars are required
and all of them can be overriden via direct setting of the property on the configuration object.
Property| Description
--- | ---
JAEGER_SERVICE_NAME | The service name
JAEGER_AGENT_HOST | The hostname for communicating with agent via UDP
JAEGER_AGENT_PORT | The port for communicating with agent via UDP
JAEGER_REPORTER_LOG_SPANS | Whether the reporter should also log the spans
JAEGER_REPORTER_MAX_QUEUE_SIZE | The reporter's maximum queue size
JAEGER_REPORTER_FLUSH_INTERVAL | The reporter's flush interval (ms)
JAEGER_SAMPLER_TYPE | The sampler type
JAEGER_SAMPLER_PARAM | The sampler parameter (number)
JAEGER_SAMPLER_MANAGER_HOST_PORT | The host name and port when using the remote controlled sampler
JAEGER_SAMPLER_MAX_OPERATIONS | The maximum number of operations that the sampler will keep track of
JAEGER_SAMPLER_REFRESH_INTERVAL | How often the remotely controlled sampler will poll jaeger-agent for the appropriate sampling strategy
JAEGER_TAGS | A comma separated list of `name = value` tracer level tags, which get added to all reported spans. The value can also refer to an environment variable using the format `${envVarName:default}`, where the `:default` is optional, and identifies a value to be used if the environment variable cannot be found
JAEGER_DISABLED | Whether the tracer is disabled or not. If true, the default `opentracing.NoopTracer` is used.
JAEGER_RPC_METRICS | Whether to store RPC metrics
### Closing the tracer via `io.Closer`
The constructor function for Jaeger Tracer returns the tracer itself and an `io.Closer` instance.
It is recommended to structure your `main()` so that it calls the `Close()` function on the closer
before exiting, e.g.
```go
tracer, closer, err := cfg.NewTracer(...)
defer closer.Close()
```
This is especially useful for command-line tools that enable tracing, as well as
for the long-running apps that support graceful shutdown. For example, if your deployment
system sends SIGTERM instead of killing the process and you trap that signal to do a graceful
exit, then having `defer closer.Closer()` ensures that all buffered spans are flushed.
### Metrics & Monitoring
The tracer emits a number of different metrics, defined in
[metrics.go](metrics.go). The monitoring backend is expected to support
tag-based metric names, e.g. instead of `statsd`-style string names
like `counters.my-service.jaeger.spans.started.sampled`, the metrics
are defined by a short name and a collection of key/value tags, for
example: `name:jaeger.traces, state:started, sampled:y`. See [metrics.go](./metrics.go)
file for the full list and descriptions of emitted metrics.
The monitoring backend is represented by the `metrics.Factory` interface from package
[`"github.com/uber/jaeger-lib/metrics"`](https://github.com/jaegertracing/jaeger-lib/tree/master/metrics). An implementation
of that interface can be passed as an option to either the Configuration object or the Tracer
constructor, for example:
```go
import (
"github.com/uber/jaeger-client-go/config"
"github.com/uber/jaeger-lib/metrics/prometheus"
)
metricsFactory := prometheus.New()
tracer, closer, err := config.Configuration{
ServiceName: "your-service-name",
}.NewTracer(
config.Metrics(metricsFactory),
)
```
By default, a no-op `metrics.NullFactory` is used.
### Logging
The tracer can be configured with an optional logger, which will be
used to log communication errors, or log spans if a logging reporter
option is specified in the configuration. The logging API is abstracted
by the [Logger](logger.go) interface. A logger instance implementing
this interface can be set on the `Config` object before calling the
`New` method.
Besides the [zap](https://github.com/uber-go/zap) implementation
bundled with this package there is also a [go-kit](https://github.com/go-kit/kit)
one in the [jaeger-lib](https://github.com/jaegertracing/jaeger-lib) repository.
## Instrumentation for Tracing
Since this tracer is fully compliant with OpenTracing API 1.0,
all code instrumentation should only use the API itself, as described
in the [opentracing-go](https://github.com/opentracing/opentracing-go) documentation.
## Features
### Reporters
A "reporter" is a component that receives the finished spans and reports
them to somewhere. Under normal circumstances, the Tracer
should use the default `RemoteReporter`, which sends the spans out of
process via configurable "transport". For testing purposes, one can
use an `InMemoryReporter` that accumulates spans in a buffer and
allows to retrieve them for later verification. Also available are
`NullReporter`, a no-op reporter that does nothing, a `LoggingReporter`
which logs all finished spans using their `String()` method, and a
`CompositeReporter` that can be used to combine more than one reporter
into one, e.g. to attach a logging reporter to the main remote reporter.
### Span Reporting Transports
The remote reporter uses "transports" to actually send the spans out
of process. Currently the supported transports include:
* [Jaeger Thrift](https://github.com/jaegertracing/jaeger-idl/blob/master/thrift/agent.thrift) over UDP or HTTP,
* [Zipkin Thrift](https://github.com/jaegertracing/jaeger-idl/blob/master/thrift/zipkincore.thrift) over HTTP.
### Sampling
The tracer does not record all spans, but only those that have the
sampling bit set in the `flags`. When a new trace is started and a new
unique ID is generated, a sampling decision is made whether this trace
should be sampled. The sampling decision is propagated to all downstream
calls via the `flags` field of the trace context. The following samplers
are available:
1. `RemotelyControlledSampler` uses one of the other simpler samplers
and periodically updates it by polling an external server. This
allows dynamic control of the sampling strategies.
1. `ConstSampler` always makes the same sampling decision for all
trace IDs. it can be configured to either sample all traces, or
to sample none.
1. `ProbabilisticSampler` uses a fixed sampling rate as a probability
for a given trace to be sampled. The actual decision is made by
comparing the trace ID with a random number multiplied by the
sampling rate.
1. `RateLimitingSampler` can be used to allow only a certain fixed
number of traces to be sampled per second.
### Baggage Injection
The OpenTracing spec allows for [baggage][baggage], which are key value pairs that are added
to the span context and propagated throughout the trace. An external process can inject baggage
by setting the special HTTP Header `jaeger-baggage` on a request:
```sh
curl -H "jaeger-baggage: key1=value1, key2=value2" http://myhost.com
```
Baggage can also be programatically set inside your service:
```go
if span := opentracing.SpanFromContext(ctx); span != nil {
span.SetBaggageItem("key", "value")
}
```
Another service downstream of that can retrieve the baggage in a similar way:
```go
if span := opentracing.SpanFromContext(ctx); span != nil {
val := span.BaggageItem("key")
println(val)
}
```
### Debug Traces (Forced Sampling)
#### Programmatically
The OpenTracing API defines a `sampling.priority` standard tag that
can be used to affect the sampling of a span and its children:
```go
import (
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
)
span := opentracing.SpanFromContext(ctx)
ext.SamplingPriority.Set(span, 1)
```
#### Via HTTP Headers
Jaeger Tracer also understands a special HTTP Header `jaeger-debug-id`,
which can be set in the incoming request, e.g.
```sh
curl -H "jaeger-debug-id: some-correlation-id" http://myhost.com
```
When Jaeger sees this header in the request that otherwise has no
tracing context, it ensures that the new trace started for this
request will be sampled in the "debug" mode (meaning it should survive
all downsampling that might happen in the collection pipeline), and the
root span will have a tag as if this statement was executed:
```go
span.SetTag("jaeger-debug-id", "some-correlation-id")
```
This allows using Jaeger UI to find the trace by this tag.
### Zipkin HTTP B3 compatible header propagation
Jaeger Tracer supports Zipkin B3 Propagation HTTP headers, which are used
by a lot of Zipkin tracers. This means that you can use Jaeger in conjunction with e.g. [these OpenZipkin tracers](https://github.com/openzipkin).
However it is not the default propagation format, see [here](zipkin/README.md#NewZipkinB3HTTPHeaderPropagator) how to set it up.
## License
[Apache 2.0 License](LICENSE).
[doc-img]: https://godoc.org/github.com/uber/jaeger-client-go?status.svg
[doc]: https://godoc.org/github.com/uber/jaeger-client-go
[ci-img]: https://travis-ci.org/jaegertracing/jaeger-client-go.svg?branch=master
[ci]: https://travis-ci.org/jaegertracing/jaeger-client-go
[cov-img]: https://codecov.io/gh/jaegertracing/jaeger-client-go/branch/master/graph/badge.svg
[cov]: https://codecov.io/gh/jaegertracing/jaeger-client-go
[ot-img]: https://img.shields.io/badge/OpenTracing--1.0-enabled-blue.svg
[ot-url]: http://opentracing.io
[baggage]: https://github.com/opentracing/specification/blob/master/specification.md#set-a-baggage-item

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# Release Process
1. Create a PR "Preparing for release X.Y.Z" against master branch
* Alter CHANGELOG.md from `<placeholder_version> (unreleased)` to `<X.Y.Z> (YYYY-MM-DD)`
* Update `JaegerClientVersion` in constants.go to `Go-X.Y.Z`
2. Create a release "Release X.Y.Z" on Github
* Create Tag `vX.Y.Z`
* Copy CHANGELOG.md into the release notes
3. Create a PR "Back to development" against master branch
* Add `<next_version> (unreleased)` to CHANGELOG.md
* Update `JaegerClientVersion` in constants.go to `Go-<next_version>dev`

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"github.com/opentracing/opentracing-go/log"
"github.com/uber/jaeger-client-go/internal/baggage"
)
// baggageSetter is an actor that can set a baggage value on a Span given certain
// restrictions (eg. maxValueLength).
type baggageSetter struct {
restrictionManager baggage.RestrictionManager
metrics *Metrics
}
func newBaggageSetter(restrictionManager baggage.RestrictionManager, metrics *Metrics) *baggageSetter {
return &baggageSetter{
restrictionManager: restrictionManager,
metrics: metrics,
}
}
// (NB) span should hold the lock before making this call
func (s *baggageSetter) setBaggage(span *Span, key, value string) {
var truncated bool
var prevItem string
restriction := s.restrictionManager.GetRestriction(span.serviceName(), key)
if !restriction.KeyAllowed() {
s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
s.metrics.BaggageUpdateFailure.Inc(1)
return
}
if len(value) > restriction.MaxValueLength() {
truncated = true
value = value[:restriction.MaxValueLength()]
s.metrics.BaggageTruncate.Inc(1)
}
prevItem = span.context.baggage[key]
s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
span.context = span.context.WithBaggageItem(key, value)
s.metrics.BaggageUpdateSuccess.Inc(1)
}
func (s *baggageSetter) logFields(span *Span, key, value, prevItem string, truncated, valid bool) {
if !span.context.IsSampled() {
return
}
fields := []log.Field{
log.String("event", "baggage"),
log.String("key", key),
log.String("value", value),
}
if prevItem != "" {
fields = append(fields, log.String("override", "true"))
}
if truncated {
fields = append(fields, log.String("truncated", "true"))
}
if !valid {
fields = append(fields, log.String("invalid", "true"))
}
span.logFieldsNoLocking(fields...)
}

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// Copyright (c) 2017-2018 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
"errors"
"fmt"
"io"
"strings"
"time"
"github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-client-go"
"github.com/uber/jaeger-client-go/internal/baggage/remote"
throttler "github.com/uber/jaeger-client-go/internal/throttler/remote"
"github.com/uber/jaeger-client-go/rpcmetrics"
)
const defaultSamplingProbability = 0.001
// Configuration configures and creates Jaeger Tracer
type Configuration struct {
// ServiceName specifies the service name to use on the tracer.
// Can be provided via environment variable named JAEGER_SERVICE_NAME
ServiceName string `yaml:"serviceName"`
// Disabled can be provided via environment variable named JAEGER_DISABLED
Disabled bool `yaml:"disabled"`
// RPCMetrics can be provided via environment variable named JAEGER_RPC_METRICS
RPCMetrics bool `yaml:"rpc_metrics"`
// Tags can be provided via environment variable named JAEGER_TAGS
Tags []opentracing.Tag `yaml:"tags"`
Sampler *SamplerConfig `yaml:"sampler"`
Reporter *ReporterConfig `yaml:"reporter"`
Headers *jaeger.HeadersConfig `yaml:"headers"`
BaggageRestrictions *BaggageRestrictionsConfig `yaml:"baggage_restrictions"`
Throttler *ThrottlerConfig `yaml:"throttler"`
}
// SamplerConfig allows initializing a non-default sampler. All fields are optional.
type SamplerConfig struct {
// Type specifies the type of the sampler: const, probabilistic, rateLimiting, or remote
// Can be set by exporting an environment variable named JAEGER_SAMPLER_TYPE
Type string `yaml:"type"`
// Param is a value passed to the sampler.
// Valid values for Param field are:
// - for "const" sampler, 0 or 1 for always false/true respectively
// - for "probabilistic" sampler, a probability between 0 and 1
// - for "rateLimiting" sampler, the number of spans per second
// - for "remote" sampler, param is the same as for "probabilistic"
// and indicates the initial sampling rate before the actual one
// is received from the mothership.
// Can be set by exporting an environment variable named JAEGER_SAMPLER_PARAM
Param float64 `yaml:"param"`
// SamplingServerURL is the address of jaeger-agent's HTTP sampling server
// Can be set by exporting an environment variable named JAEGER_SAMPLER_MANAGER_HOST_PORT
SamplingServerURL string `yaml:"samplingServerURL"`
// MaxOperations is the maximum number of operations that the sampler
// will keep track of. If an operation is not tracked, a default probabilistic
// sampler will be used rather than the per operation specific sampler.
// Can be set by exporting an environment variable named JAEGER_SAMPLER_MAX_OPERATIONS
MaxOperations int `yaml:"maxOperations"`
// SamplingRefreshInterval controls how often the remotely controlled sampler will poll
// jaeger-agent for the appropriate sampling strategy.
// Can be set by exporting an environment variable named JAEGER_SAMPLER_REFRESH_INTERVAL
SamplingRefreshInterval time.Duration `yaml:"samplingRefreshInterval"`
}
// ReporterConfig configures the reporter. All fields are optional.
type ReporterConfig struct {
// QueueSize controls how many spans the reporter can keep in memory before it starts dropping
// new spans. The queue is continuously drained by a background go-routine, as fast as spans
// can be sent out of process.
// Can be set by exporting an environment variable named JAEGER_REPORTER_MAX_QUEUE_SIZE
QueueSize int `yaml:"queueSize"`
// BufferFlushInterval controls how often the buffer is force-flushed, even if it's not full.
// It is generally not useful, as it only matters for very low traffic services.
// Can be set by exporting an environment variable named JAEGER_REPORTER_FLUSH_INTERVAL
BufferFlushInterval time.Duration
// LogSpans, when true, enables LoggingReporter that runs in parallel with the main reporter
// and logs all submitted spans. Main Configuration.Logger must be initialized in the code
// for this option to have any effect.
// Can be set by exporting an environment variable named JAEGER_REPORTER_LOG_SPANS
LogSpans bool `yaml:"logSpans"`
// LocalAgentHostPort instructs reporter to send spans to jaeger-agent at this address
// Can be set by exporting an environment variable named JAEGER_AGENT_HOST / JAEGER_AGENT_PORT
LocalAgentHostPort string `yaml:"localAgentHostPort"`
}
// BaggageRestrictionsConfig configures the baggage restrictions manager which can be used to whitelist
// certain baggage keys. All fields are optional.
type BaggageRestrictionsConfig struct {
// DenyBaggageOnInitializationFailure controls the startup failure mode of the baggage restriction
// manager. If true, the manager will not allow any baggage to be written until baggage restrictions have
// been retrieved from jaeger-agent. If false, the manager wil allow any baggage to be written until baggage
// restrictions have been retrieved from jaeger-agent.
DenyBaggageOnInitializationFailure bool `yaml:"denyBaggageOnInitializationFailure"`
// HostPort is the hostPort of jaeger-agent's baggage restrictions server
HostPort string `yaml:"hostPort"`
// RefreshInterval controls how often the baggage restriction manager will poll
// jaeger-agent for the most recent baggage restrictions.
RefreshInterval time.Duration `yaml:"refreshInterval"`
}
// ThrottlerConfig configures the throttler which can be used to throttle the
// rate at which the client may send debug requests.
type ThrottlerConfig struct {
// HostPort of jaeger-agent's credit server.
HostPort string `yaml:"hostPort"`
// RefreshInterval controls how often the throttler will poll jaeger-agent
// for more throttling credits.
RefreshInterval time.Duration `yaml:"refreshInterval"`
// SynchronousInitialization determines whether or not the throttler should
// synchronously fetch credits from the agent when an operation is seen for
// the first time. This should be set to true if the client will be used by
// a short lived service that needs to ensure that credits are fetched
// upfront such that sampling or throttling occurs.
SynchronousInitialization bool `yaml:"synchronousInitialization"`
}
type nullCloser struct{}
func (*nullCloser) Close() error { return nil }
// New creates a new Jaeger Tracer, and a closer func that can be used to flush buffers
// before shutdown.
//
// Deprecated: use NewTracer() function
func (c Configuration) New(
serviceName string,
options ...Option,
) (opentracing.Tracer, io.Closer, error) {
if serviceName != "" {
c.ServiceName = serviceName
}
return c.NewTracer(options...)
}
// NewTracer returns a new tracer based on the current configuration, using the given options,
// and a closer func that can be used to flush buffers before shutdown.
func (c Configuration) NewTracer(options ...Option) (opentracing.Tracer, io.Closer, error) {
if c.ServiceName == "" {
return nil, nil, errors.New("no service name provided")
}
if c.Disabled {
return &opentracing.NoopTracer{}, &nullCloser{}, nil
}
opts := applyOptions(options...)
tracerMetrics := jaeger.NewMetrics(opts.metrics, nil)
if c.RPCMetrics {
Observer(
rpcmetrics.NewObserver(
opts.metrics.Namespace("jaeger-rpc", map[string]string{"component": "jaeger"}),
rpcmetrics.DefaultNameNormalizer,
),
)(&opts) // adds to c.observers
}
if c.Sampler == nil {
c.Sampler = &SamplerConfig{
Type: jaeger.SamplerTypeRemote,
Param: defaultSamplingProbability,
}
}
if c.Reporter == nil {
c.Reporter = &ReporterConfig{}
}
sampler := opts.sampler
if sampler == nil {
s, err := c.Sampler.NewSampler(c.ServiceName, tracerMetrics)
if err != nil {
return nil, nil, err
}
sampler = s
}
reporter := opts.reporter
if reporter == nil {
r, err := c.Reporter.NewReporter(c.ServiceName, tracerMetrics, opts.logger)
if err != nil {
return nil, nil, err
}
reporter = r
}
tracerOptions := []jaeger.TracerOption{
jaeger.TracerOptions.Metrics(tracerMetrics),
jaeger.TracerOptions.Logger(opts.logger),
jaeger.TracerOptions.CustomHeaderKeys(c.Headers),
jaeger.TracerOptions.Gen128Bit(opts.gen128Bit),
jaeger.TracerOptions.ZipkinSharedRPCSpan(opts.zipkinSharedRPCSpan),
jaeger.TracerOptions.MaxTagValueLength(opts.maxTagValueLength),
}
for _, tag := range opts.tags {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Tag(tag.Key, tag.Value))
}
for _, tag := range c.Tags {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Tag(tag.Key, tag.Value))
}
for _, obs := range opts.observers {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Observer(obs))
}
for _, cobs := range opts.contribObservers {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.ContribObserver(cobs))
}
for format, injector := range opts.injectors {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Injector(format, injector))
}
for format, extractor := range opts.extractors {
tracerOptions = append(tracerOptions, jaeger.TracerOptions.Extractor(format, extractor))
}
if c.BaggageRestrictions != nil {
mgr := remote.NewRestrictionManager(
c.ServiceName,
remote.Options.Metrics(tracerMetrics),
remote.Options.Logger(opts.logger),
remote.Options.HostPort(c.BaggageRestrictions.HostPort),
remote.Options.RefreshInterval(c.BaggageRestrictions.RefreshInterval),
remote.Options.DenyBaggageOnInitializationFailure(
c.BaggageRestrictions.DenyBaggageOnInitializationFailure,
),
)
tracerOptions = append(tracerOptions, jaeger.TracerOptions.BaggageRestrictionManager(mgr))
}
if c.Throttler != nil {
debugThrottler := throttler.NewThrottler(
c.ServiceName,
throttler.Options.Metrics(tracerMetrics),
throttler.Options.Logger(opts.logger),
throttler.Options.HostPort(c.Throttler.HostPort),
throttler.Options.RefreshInterval(c.Throttler.RefreshInterval),
throttler.Options.SynchronousInitialization(
c.Throttler.SynchronousInitialization,
),
)
tracerOptions = append(tracerOptions, jaeger.TracerOptions.DebugThrottler(debugThrottler))
}
tracer, closer := jaeger.NewTracer(
c.ServiceName,
sampler,
reporter,
tracerOptions...,
)
return tracer, closer, nil
}
// InitGlobalTracer creates a new Jaeger Tracer, and sets it as global OpenTracing Tracer.
// It returns a closer func that can be used to flush buffers before shutdown.
func (c Configuration) InitGlobalTracer(
serviceName string,
options ...Option,
) (io.Closer, error) {
if c.Disabled {
return &nullCloser{}, nil
}
tracer, closer, err := c.New(serviceName, options...)
if err != nil {
return nil, err
}
opentracing.SetGlobalTracer(tracer)
return closer, nil
}
// NewSampler creates a new sampler based on the configuration
func (sc *SamplerConfig) NewSampler(
serviceName string,
metrics *jaeger.Metrics,
) (jaeger.Sampler, error) {
samplerType := strings.ToLower(sc.Type)
if samplerType == jaeger.SamplerTypeConst {
return jaeger.NewConstSampler(sc.Param != 0), nil
}
if samplerType == jaeger.SamplerTypeProbabilistic {
if sc.Param >= 0 && sc.Param <= 1.0 {
return jaeger.NewProbabilisticSampler(sc.Param)
}
return nil, fmt.Errorf(
"Invalid Param for probabilistic sampler: %v. Expecting value between 0 and 1",
sc.Param,
)
}
if samplerType == jaeger.SamplerTypeRateLimiting {
return jaeger.NewRateLimitingSampler(sc.Param), nil
}
if samplerType == jaeger.SamplerTypeRemote || sc.Type == "" {
sc2 := *sc
sc2.Type = jaeger.SamplerTypeProbabilistic
initSampler, err := sc2.NewSampler(serviceName, nil)
if err != nil {
return nil, err
}
options := []jaeger.SamplerOption{
jaeger.SamplerOptions.Metrics(metrics),
jaeger.SamplerOptions.InitialSampler(initSampler),
jaeger.SamplerOptions.SamplingServerURL(sc.SamplingServerURL),
}
if sc.MaxOperations != 0 {
options = append(options, jaeger.SamplerOptions.MaxOperations(sc.MaxOperations))
}
if sc.SamplingRefreshInterval != 0 {
options = append(options, jaeger.SamplerOptions.SamplingRefreshInterval(sc.SamplingRefreshInterval))
}
return jaeger.NewRemotelyControlledSampler(serviceName, options...), nil
}
return nil, fmt.Errorf("Unknown sampler type %v", sc.Type)
}
// NewReporter instantiates a new reporter that submits spans to tcollector
func (rc *ReporterConfig) NewReporter(
serviceName string,
metrics *jaeger.Metrics,
logger jaeger.Logger,
) (jaeger.Reporter, error) {
sender, err := rc.newTransport()
if err != nil {
return nil, err
}
reporter := jaeger.NewRemoteReporter(
sender,
jaeger.ReporterOptions.QueueSize(rc.QueueSize),
jaeger.ReporterOptions.BufferFlushInterval(rc.BufferFlushInterval),
jaeger.ReporterOptions.Logger(logger),
jaeger.ReporterOptions.Metrics(metrics))
if rc.LogSpans && logger != nil {
logger.Infof("Initializing logging reporter\n")
reporter = jaeger.NewCompositeReporter(jaeger.NewLoggingReporter(logger), reporter)
}
return reporter, err
}
func (rc *ReporterConfig) newTransport() (jaeger.Transport, error) {
return jaeger.NewUDPTransport(rc.LocalAgentHostPort, 0)
}

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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
"fmt"
"os"
"strconv"
"strings"
"time"
opentracing "github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
"github.com/uber/jaeger-client-go"
)
const (
// environment variable names
envServiceName = "JAEGER_SERVICE_NAME"
envDisabled = "JAEGER_DISABLED"
envRPCMetrics = "JAEGER_RPC_METRICS"
envTags = "JAEGER_TAGS"
envSamplerType = "JAEGER_SAMPLER_TYPE"
envSamplerParam = "JAEGER_SAMPLER_PARAM"
envSamplerManagerHostPort = "JAEGER_SAMPLER_MANAGER_HOST_PORT"
envSamplerMaxOperations = "JAEGER_SAMPLER_MAX_OPERATIONS"
envSamplerRefreshInterval = "JAEGER_SAMPLER_REFRESH_INTERVAL"
envReporterMaxQueueSize = "JAEGER_REPORTER_MAX_QUEUE_SIZE"
envReporterFlushInterval = "JAEGER_REPORTER_FLUSH_INTERVAL"
envReporterLogSpans = "JAEGER_REPORTER_LOG_SPANS"
envAgentHost = "JAEGER_AGENT_HOST"
envAgentPort = "JAEGER_AGENT_PORT"
)
// FromEnv uses environment variables to set the tracer's Configuration
func FromEnv() (*Configuration, error) {
c := &Configuration{}
if e := os.Getenv(envServiceName); e != "" {
c.ServiceName = e
}
if e := os.Getenv(envRPCMetrics); e != "" {
if value, err := strconv.ParseBool(e); err == nil {
c.RPCMetrics = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envRPCMetrics, e)
}
}
if e := os.Getenv(envDisabled); e != "" {
if value, err := strconv.ParseBool(e); err == nil {
c.Disabled = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envDisabled, e)
}
}
if e := os.Getenv(envTags); e != "" {
c.Tags = parseTags(e)
}
if s, err := samplerConfigFromEnv(); err == nil {
c.Sampler = s
} else {
return nil, errors.Wrap(err, "cannot obtain sampler config from env")
}
if r, err := reporterConfigFromEnv(); err == nil {
c.Reporter = r
} else {
return nil, errors.Wrap(err, "cannot obtain reporter config from env")
}
return c, nil
}
// samplerConfigFromEnv creates a new SamplerConfig based on the environment variables
func samplerConfigFromEnv() (*SamplerConfig, error) {
sc := &SamplerConfig{}
if e := os.Getenv(envSamplerType); e != "" {
sc.Type = e
}
if e := os.Getenv(envSamplerParam); e != "" {
if value, err := strconv.ParseFloat(e, 64); err == nil {
sc.Param = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerParam, e)
}
}
if e := os.Getenv(envSamplerManagerHostPort); e != "" {
sc.SamplingServerURL = e
}
if e := os.Getenv(envSamplerMaxOperations); e != "" {
if value, err := strconv.ParseInt(e, 10, 0); err == nil {
sc.MaxOperations = int(value)
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerMaxOperations, e)
}
}
if e := os.Getenv(envSamplerRefreshInterval); e != "" {
if value, err := time.ParseDuration(e); err == nil {
sc.SamplingRefreshInterval = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerRefreshInterval, e)
}
}
return sc, nil
}
// reporterConfigFromEnv creates a new ReporterConfig based on the environment variables
func reporterConfigFromEnv() (*ReporterConfig, error) {
rc := &ReporterConfig{}
if e := os.Getenv(envReporterMaxQueueSize); e != "" {
if value, err := strconv.ParseInt(e, 10, 0); err == nil {
rc.QueueSize = int(value)
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterMaxQueueSize, e)
}
}
if e := os.Getenv(envReporterFlushInterval); e != "" {
if value, err := time.ParseDuration(e); err == nil {
rc.BufferFlushInterval = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterFlushInterval, e)
}
}
if e := os.Getenv(envReporterLogSpans); e != "" {
if value, err := strconv.ParseBool(e); err == nil {
rc.LogSpans = value
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterLogSpans, e)
}
}
host := jaeger.DefaultUDPSpanServerHost
if e := os.Getenv(envAgentHost); e != "" {
host = e
}
port := jaeger.DefaultUDPSpanServerPort
if e := os.Getenv(envAgentPort); e != "" {
if value, err := strconv.ParseInt(e, 10, 0); err == nil {
port = int(value)
} else {
return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envAgentPort, e)
}
}
// the side effect of this is that we are building the default value, even if none of the env vars
// were not explicitly passed
rc.LocalAgentHostPort = fmt.Sprintf("%s:%d", host, port)
return rc, nil
}
// parseTags parses the given string into a collection of Tags.
// Spec for this value:
// - comma separated list of key=value
// - value can be specified using the notation ${envVar:defaultValue}, where `envVar`
// is an environment variable and `defaultValue` is the value to use in case the env var is not set
func parseTags(sTags string) []opentracing.Tag {
pairs := strings.Split(sTags, ",")
tags := make([]opentracing.Tag, 0)
for _, p := range pairs {
kv := strings.SplitN(p, "=", 2)
k, v := strings.TrimSpace(kv[0]), strings.TrimSpace(kv[1])
if strings.HasPrefix(v, "${") && strings.HasSuffix(v, "}") {
ed := strings.SplitN(v[2:len(v)-1], ":", 2)
e, d := ed[0], ed[1]
v = os.Getenv(e)
if v == "" && d != "" {
v = d
}
}
tag := opentracing.Tag{Key: k, Value: v}
tags = append(tags, tag)
}
return tags
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
opentracing "github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-lib/metrics"
"github.com/uber/jaeger-client-go"
)
// Option is a function that sets some option on the client.
type Option func(c *Options)
// Options control behavior of the client.
type Options struct {
metrics metrics.Factory
logger jaeger.Logger
reporter jaeger.Reporter
sampler jaeger.Sampler
contribObservers []jaeger.ContribObserver
observers []jaeger.Observer
gen128Bit bool
zipkinSharedRPCSpan bool
maxTagValueLength int
tags []opentracing.Tag
injectors map[interface{}]jaeger.Injector
extractors map[interface{}]jaeger.Extractor
}
// Metrics creates an Option that initializes Metrics in the tracer,
// which is used to emit statistics about spans.
func Metrics(factory metrics.Factory) Option {
return func(c *Options) {
c.metrics = factory
}
}
// Logger can be provided to log Reporter errors, as well as to log spans
// if Reporter.LogSpans is set to true.
func Logger(logger jaeger.Logger) Option {
return func(c *Options) {
c.logger = logger
}
}
// Reporter can be provided explicitly to override the configuration.
// Useful for testing, e.g. by passing InMemoryReporter.
func Reporter(reporter jaeger.Reporter) Option {
return func(c *Options) {
c.reporter = reporter
}
}
// Sampler can be provided explicitly to override the configuration.
func Sampler(sampler jaeger.Sampler) Option {
return func(c *Options) {
c.sampler = sampler
}
}
// Observer can be registered with the Tracer to receive notifications about new Spans.
func Observer(observer jaeger.Observer) Option {
return func(c *Options) {
c.observers = append(c.observers, observer)
}
}
// ContribObserver can be registered with the Tracer to recieve notifications
// about new spans.
func ContribObserver(observer jaeger.ContribObserver) Option {
return func(c *Options) {
c.contribObservers = append(c.contribObservers, observer)
}
}
// Gen128Bit specifies whether to generate 128bit trace IDs.
func Gen128Bit(gen128Bit bool) Option {
return func(c *Options) {
c.gen128Bit = gen128Bit
}
}
// ZipkinSharedRPCSpan creates an option that enables sharing span ID between client
// and server spans a la zipkin. If false, client and server spans will be assigned
// different IDs.
func ZipkinSharedRPCSpan(zipkinSharedRPCSpan bool) Option {
return func(c *Options) {
c.zipkinSharedRPCSpan = zipkinSharedRPCSpan
}
}
// MaxTagValueLength can be provided to override the default max tag value length.
func MaxTagValueLength(maxTagValueLength int) Option {
return func(c *Options) {
c.maxTagValueLength = maxTagValueLength
}
}
// Tag creates an option that adds a tracer-level tag.
func Tag(key string, value interface{}) Option {
return func(c *Options) {
c.tags = append(c.tags, opentracing.Tag{Key: key, Value: value})
}
}
// Injector registers an Injector with the given format.
func Injector(format interface{}, injector jaeger.Injector) Option {
return func(c *Options) {
c.injectors[format] = injector
}
}
// Extractor registers an Extractor with the given format.
func Extractor(format interface{}, extractor jaeger.Extractor) Option {
return func(c *Options) {
c.extractors[format] = extractor
}
}
func applyOptions(options ...Option) Options {
opts := Options{
injectors: make(map[interface{}]jaeger.Injector),
extractors: make(map[interface{}]jaeger.Extractor),
}
for _, option := range options {
option(&opts)
}
if opts.metrics == nil {
opts.metrics = metrics.NullFactory
}
if opts.logger == nil {
opts.logger = jaeger.NullLogger
}
return opts
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
const (
// JaegerClientVersion is the version of the client library reported as Span tag.
JaegerClientVersion = "Go-2.15.0-dev"
// JaegerClientVersionTagKey is the name of the tag used to report client version.
JaegerClientVersionTagKey = "jaeger.version"
// JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
// if found in the carrier, forces the trace to be sampled as "debug" trace.
// The value of the header is recorded as the tag on the root span, so that the
// trace can be found in the UI using this value as a correlation ID.
JaegerDebugHeader = "jaeger-debug-id"
// JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
// It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
// a root span does not exist.
JaegerBaggageHeader = "jaeger-baggage"
// TracerHostnameTagKey used to report host name of the process.
TracerHostnameTagKey = "hostname"
// TracerIPTagKey used to report ip of the process.
TracerIPTagKey = "ip"
// TracerUUIDTagKey used to report UUID of the client process.
TracerUUIDTagKey = "client-uuid"
// SamplerTypeTagKey reports which sampler was used on the root span.
SamplerTypeTagKey = "sampler.type"
// SamplerParamTagKey reports the parameter of the sampler, like sampling probability.
SamplerParamTagKey = "sampler.param"
// TraceContextHeaderName is the http header name used to propagate tracing context.
// This must be in lower-case to avoid mismatches when decoding incoming headers.
TraceContextHeaderName = "uber-trace-id"
// TracerStateHeaderName is deprecated.
// Deprecated: use TraceContextHeaderName
TracerStateHeaderName = TraceContextHeaderName
// TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
// This must be in lower-case to avoid mismatches when decoding incoming headers.
TraceBaggageHeaderPrefix = "uberctx-"
// SamplerTypeConst is the type of sampler that always makes the same decision.
SamplerTypeConst = "const"
// SamplerTypeRemote is the type of sampler that polls Jaeger agent for sampling strategy.
SamplerTypeRemote = "remote"
// SamplerTypeProbabilistic is the type of sampler that samples traces
// with a certain fixed probability.
SamplerTypeProbabilistic = "probabilistic"
// SamplerTypeRateLimiting is the type of sampler that samples
// only up to a fixed number of traces per second.
SamplerTypeRateLimiting = "ratelimiting"
// SamplerTypeLowerBound is the type of sampler that samples
// at least a fixed number of traces per second.
SamplerTypeLowerBound = "lowerbound"
// DefaultUDPSpanServerHost is the default host to send the spans to, via UDP
DefaultUDPSpanServerHost = "localhost"
// DefaultUDPSpanServerPort is the default port to send the spans to, via UDP
DefaultUDPSpanServerPort = 6831
// DefaultMaxTagValueLength is the default max length of byte array or string allowed in the tag value.
DefaultMaxTagValueLength = 256
)

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"errors"
"fmt"
"strconv"
"strings"
)
const (
flagSampled = byte(1)
flagDebug = byte(2)
)
var (
errEmptyTracerStateString = errors.New("Cannot convert empty string to tracer state")
errMalformedTracerStateString = errors.New("String does not match tracer state format")
emptyContext = SpanContext{}
)
// TraceID represents unique 128bit identifier of a trace
type TraceID struct {
High, Low uint64
}
// SpanID represents unique 64bit identifier of a span
type SpanID uint64
// SpanContext represents propagated span identity and state
type SpanContext struct {
// traceID represents globally unique ID of the trace.
// Usually generated as a random number.
traceID TraceID
// spanID represents span ID that must be unique within its trace,
// but does not have to be globally unique.
spanID SpanID
// parentID refers to the ID of the parent span.
// Should be 0 if the current span is a root span.
parentID SpanID
// flags is a bitmap containing such bits as 'sampled' and 'debug'.
flags byte
// Distributed Context baggage. The is a snapshot in time.
baggage map[string]string
// debugID can be set to some correlation ID when the context is being
// extracted from a TextMap carrier.
//
// See JaegerDebugHeader in constants.go
debugID string
}
// ForeachBaggageItem implements ForeachBaggageItem() of opentracing.SpanContext
func (c SpanContext) ForeachBaggageItem(handler func(k, v string) bool) {
for k, v := range c.baggage {
if !handler(k, v) {
break
}
}
}
// IsSampled returns whether this trace was chosen for permanent storage
// by the sampling mechanism of the tracer.
func (c SpanContext) IsSampled() bool {
return (c.flags & flagSampled) == flagSampled
}
// IsDebug indicates whether sampling was explicitly requested by the service.
func (c SpanContext) IsDebug() bool {
return (c.flags & flagDebug) == flagDebug
}
// IsValid indicates whether this context actually represents a valid trace.
func (c SpanContext) IsValid() bool {
return c.traceID.IsValid() && c.spanID != 0
}
func (c SpanContext) String() string {
if c.traceID.High == 0 {
return fmt.Sprintf("%x:%x:%x:%x", c.traceID.Low, uint64(c.spanID), uint64(c.parentID), c.flags)
}
return fmt.Sprintf("%x%016x:%x:%x:%x", c.traceID.High, c.traceID.Low, uint64(c.spanID), uint64(c.parentID), c.flags)
}
// ContextFromString reconstructs the Context encoded in a string
func ContextFromString(value string) (SpanContext, error) {
var context SpanContext
if value == "" {
return emptyContext, errEmptyTracerStateString
}
parts := strings.Split(value, ":")
if len(parts) != 4 {
return emptyContext, errMalformedTracerStateString
}
var err error
if context.traceID, err = TraceIDFromString(parts[0]); err != nil {
return emptyContext, err
}
if context.spanID, err = SpanIDFromString(parts[1]); err != nil {
return emptyContext, err
}
if context.parentID, err = SpanIDFromString(parts[2]); err != nil {
return emptyContext, err
}
flags, err := strconv.ParseUint(parts[3], 10, 8)
if err != nil {
return emptyContext, err
}
context.flags = byte(flags)
return context, nil
}
// TraceID returns the trace ID of this span context
func (c SpanContext) TraceID() TraceID {
return c.traceID
}
// SpanID returns the span ID of this span context
func (c SpanContext) SpanID() SpanID {
return c.spanID
}
// ParentID returns the parent span ID of this span context
func (c SpanContext) ParentID() SpanID {
return c.parentID
}
// NewSpanContext creates a new instance of SpanContext
func NewSpanContext(traceID TraceID, spanID, parentID SpanID, sampled bool, baggage map[string]string) SpanContext {
flags := byte(0)
if sampled {
flags = flagSampled
}
return SpanContext{
traceID: traceID,
spanID: spanID,
parentID: parentID,
flags: flags,
baggage: baggage}
}
// CopyFrom copies data from ctx into this context, including span identity and baggage.
// TODO This is only used by interop.go. Remove once TChannel Go supports OpenTracing.
func (c *SpanContext) CopyFrom(ctx *SpanContext) {
c.traceID = ctx.traceID
c.spanID = ctx.spanID
c.parentID = ctx.parentID
c.flags = ctx.flags
if l := len(ctx.baggage); l > 0 {
c.baggage = make(map[string]string, l)
for k, v := range ctx.baggage {
c.baggage[k] = v
}
} else {
c.baggage = nil
}
}
// WithBaggageItem creates a new context with an extra baggage item.
func (c SpanContext) WithBaggageItem(key, value string) SpanContext {
var newBaggage map[string]string
if c.baggage == nil {
newBaggage = map[string]string{key: value}
} else {
newBaggage = make(map[string]string, len(c.baggage)+1)
for k, v := range c.baggage {
newBaggage[k] = v
}
newBaggage[key] = value
}
// Use positional parameters so the compiler will help catch new fields.
return SpanContext{c.traceID, c.spanID, c.parentID, c.flags, newBaggage, ""}
}
// isDebugIDContainerOnly returns true when the instance of the context is only
// used to return the debug/correlation ID from extract() method. This happens
// in the situation when "jaeger-debug-id" header is passed in the carrier to
// the extract() method, but the request otherwise has no span context in it.
// Previously this would've returned opentracing.ErrSpanContextNotFound from the
// extract method, but now it returns a dummy context with only debugID filled in.
//
// See JaegerDebugHeader in constants.go
// See textMapPropagator#Extract
func (c *SpanContext) isDebugIDContainerOnly() bool {
return !c.traceID.IsValid() && c.debugID != ""
}
// ------- TraceID -------
func (t TraceID) String() string {
if t.High == 0 {
return fmt.Sprintf("%x", t.Low)
}
return fmt.Sprintf("%x%016x", t.High, t.Low)
}
// TraceIDFromString creates a TraceID from a hexadecimal string
func TraceIDFromString(s string) (TraceID, error) {
var hi, lo uint64
var err error
if len(s) > 32 {
return TraceID{}, fmt.Errorf("TraceID cannot be longer than 32 hex characters: %s", s)
} else if len(s) > 16 {
hiLen := len(s) - 16
if hi, err = strconv.ParseUint(s[0:hiLen], 16, 64); err != nil {
return TraceID{}, err
}
if lo, err = strconv.ParseUint(s[hiLen:], 16, 64); err != nil {
return TraceID{}, err
}
} else {
if lo, err = strconv.ParseUint(s, 16, 64); err != nil {
return TraceID{}, err
}
}
return TraceID{High: hi, Low: lo}, nil
}
// IsValid checks if the trace ID is valid, i.e. not zero.
func (t TraceID) IsValid() bool {
return t.High != 0 || t.Low != 0
}
// ------- SpanID -------
func (s SpanID) String() string {
return fmt.Sprintf("%x", uint64(s))
}
// SpanIDFromString creates a SpanID from a hexadecimal string
func SpanIDFromString(s string) (SpanID, error) {
if len(s) > 16 {
return SpanID(0), fmt.Errorf("SpanID cannot be longer than 16 hex characters: %s", s)
}
id, err := strconv.ParseUint(s, 16, 64)
if err != nil {
return SpanID(0), err
}
return SpanID(id), nil
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
opentracing "github.com/opentracing/opentracing-go"
)
// ContribObserver can be registered with the Tracer to receive notifications
// about new Spans. Modelled after github.com/opentracing-contrib/go-observer.
type ContribObserver interface {
// Create and return a span observer. Called when a span starts.
// If the Observer is not interested in the given span, it must return (nil, false).
// E.g :
// func StartSpan(opName string, opts ...opentracing.StartSpanOption) {
// var sp opentracing.Span
// sso := opentracing.StartSpanOptions{}
// if spanObserver, ok := Observer.OnStartSpan(span, opName, sso); ok {
// // we have a valid SpanObserver
// }
// ...
// }
OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool)
}
// ContribSpanObserver is created by the Observer and receives notifications
// about other Span events. This interface is meant to match
// github.com/opentracing-contrib/go-observer, via duck typing, without
// directly importing the go-observer package.
type ContribSpanObserver interface {
OnSetOperationName(operationName string)
OnSetTag(key string, value interface{})
OnFinish(options opentracing.FinishOptions)
}
// wrapper observer for the old observers (see observer.go)
type oldObserver struct {
obs Observer
}
func (o *oldObserver) OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool) {
spanObserver := o.obs.OnStartSpan(operationName, options)
return spanObserver, spanObserver != nil
}

24
vendor/github.com/uber/jaeger-client-go/doc.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
Package jaeger implements an OpenTracing (http://opentracing.io) Tracer.
It is currently using Zipkin-compatible data model and can be directly
itegrated with Zipkin backend (http://zipkin.io).
For integration instructions please refer to the README:
https://github.com/uber/jaeger-client-go/blob/master/README.md
*/
package jaeger

89
vendor/github.com/uber/jaeger-client-go/glide.lock generated vendored Normal file
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hash: 3accf84f97bff4a91162736104c0e9b9790820712bd86db6fec5e665f7196a82
updated: 2018-04-30T11:46:43.804556-04:00
imports:
- name: github.com/beorn7/perks
version: 3a771d992973f24aa725d07868b467d1ddfceafb
subpackages:
- quantile
- name: github.com/codahale/hdrhistogram
version: 3a0bb77429bd3a61596f5e8a3172445844342120
- name: github.com/crossdock/crossdock-go
version: 049aabb0122b03bc9bd30cab8f3f91fb60166361
subpackages:
- assert
- require
- name: github.com/davecgh/go-spew
version: 8991bc29aa16c548c550c7ff78260e27b9ab7c73
subpackages:
- spew
- name: github.com/golang/protobuf
version: bbd03ef6da3a115852eaf24c8a1c46aeb39aa175
subpackages:
- proto
- name: github.com/matttproud/golang_protobuf_extensions
version: c12348ce28de40eed0136aa2b644d0ee0650e56c
subpackages:
- pbutil
- name: github.com/opentracing/opentracing-go
version: 1949ddbfd147afd4d964a9f00b24eb291e0e7c38
subpackages:
- ext
- log
- name: github.com/pkg/errors
version: 645ef00459ed84a119197bfb8d8205042c6df63d
- name: github.com/pmezard/go-difflib
version: 792786c7400a136282c1664665ae0a8db921c6c2
subpackages:
- difflib
- name: github.com/prometheus/client_golang
version: c5b7fccd204277076155f10851dad72b76a49317
subpackages:
- prometheus
- name: github.com/prometheus/client_model
version: 99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c
subpackages:
- go
- name: github.com/prometheus/common
version: 38c53a9f4bfcd932d1b00bfc65e256a7fba6b37a
subpackages:
- expfmt
- internal/bitbucket.org/ww/goautoneg
- model
- name: github.com/prometheus/procfs
version: 780932d4fbbe0e69b84c34c20f5c8d0981e109ea
subpackages:
- internal/util
- nfs
- xfs
- name: github.com/stretchr/testify
version: 12b6f73e6084dad08a7c6e575284b177ecafbc71
subpackages:
- assert
- require
- suite
- name: github.com/uber/jaeger-lib
version: 4267858c0679cd4e47cefed8d7f70fd386cfb567
subpackages:
- metrics
- metrics/prometheus
- metrics/testutils
- name: go.uber.org/atomic
version: 8474b86a5a6f79c443ce4b2992817ff32cf208b8
- name: go.uber.org/multierr
version: 3c4937480c32f4c13a875a1829af76c98ca3d40a
- name: go.uber.org/zap
version: eeedf312bc6c57391d84767a4cd413f02a917974
subpackages:
- buffer
- internal/bufferpool
- internal/color
- internal/exit
- zapcore
- name: golang.org/x/net
version: 6078986fec03a1dcc236c34816c71b0e05018fda
subpackages:
- context
- context/ctxhttp
testImports:
- name: github.com/uber-go/atomic
version: 8474b86a5a6f79c443ce4b2992817ff32cf208b8

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vendor/github.com/uber/jaeger-client-go/glide.yaml generated vendored Normal file
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package: github.com/uber/jaeger-client-go
import:
- package: github.com/opentracing/opentracing-go
version: ^1
subpackages:
- ext
- log
- package: github.com/crossdock/crossdock-go
- package: github.com/uber/jaeger-lib
version: ^1.2.1
subpackages:
- metrics
- package: github.com/pkg/errors
version: ~0.8.0
testImport:
- package: github.com/stretchr/testify
subpackages:
- assert
- require
- suite
- package: github.com/prometheus/client_golang
version: v0.8.0

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
// HeadersConfig contains the values for the header keys that Jaeger will use.
// These values may be either custom or default depending on whether custom
// values were provided via a configuration.
type HeadersConfig struct {
// JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
// if found in the carrier, forces the trace to be sampled as "debug" trace.
// The value of the header is recorded as the tag on the root span, so that the
// trace can be found in the UI using this value as a correlation ID.
JaegerDebugHeader string `yaml:"jaegerDebugHeader"`
// JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
// It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
// a root span does not exist.
JaegerBaggageHeader string `yaml:"jaegerBaggageHeader"`
// TraceContextHeaderName is the http header name used to propagate tracing context.
// This must be in lower-case to avoid mismatches when decoding incoming headers.
TraceContextHeaderName string `yaml:"TraceContextHeaderName"`
// TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
// This must be in lower-case to avoid mismatches when decoding incoming headers.
TraceBaggageHeaderPrefix string `yaml:"traceBaggageHeaderPrefix"`
}
func (c *HeadersConfig) applyDefaults() *HeadersConfig {
if c.JaegerBaggageHeader == "" {
c.JaegerBaggageHeader = JaegerBaggageHeader
}
if c.JaegerDebugHeader == "" {
c.JaegerDebugHeader = JaegerDebugHeader
}
if c.TraceBaggageHeaderPrefix == "" {
c.TraceBaggageHeaderPrefix = TraceBaggageHeaderPrefix
}
if c.TraceContextHeaderName == "" {
c.TraceContextHeaderName = TraceContextHeaderName
}
return c
}
func getDefaultHeadersConfig() *HeadersConfig {
return &HeadersConfig{
JaegerDebugHeader: JaegerDebugHeader,
JaegerBaggageHeader: JaegerBaggageHeader,
TraceContextHeaderName: TraceContextHeaderName,
TraceBaggageHeaderPrefix: TraceBaggageHeaderPrefix,
}
}

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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
"time"
"github.com/uber/jaeger-client-go"
)
const (
defaultMaxValueLength = 2048
defaultRefreshInterval = time.Minute
defaultHostPort = "localhost:5778"
)
// Option is a function that sets some option on the RestrictionManager
type Option func(options *options)
// Options is a factory for all available options
var Options options
type options struct {
denyBaggageOnInitializationFailure bool
metrics *jaeger.Metrics
logger jaeger.Logger
hostPort string
refreshInterval time.Duration
}
// DenyBaggageOnInitializationFailure creates an Option that determines the startup failure mode of RestrictionManager.
// If DenyBaggageOnInitializationFailure is true, RestrictionManager will not allow any baggage to be written until baggage
// restrictions have been retrieved from agent.
// If DenyBaggageOnInitializationFailure is false, RestrictionManager will allow any baggage to be written until baggage
// restrictions have been retrieved from agent.
func (options) DenyBaggageOnInitializationFailure(b bool) Option {
return func(o *options) {
o.denyBaggageOnInitializationFailure = b
}
}
// Metrics creates an Option that initializes Metrics on the RestrictionManager, which is used to emit statistics.
func (options) Metrics(m *jaeger.Metrics) Option {
return func(o *options) {
o.metrics = m
}
}
// Logger creates an Option that sets the logger used by the RestrictionManager.
func (options) Logger(logger jaeger.Logger) Option {
return func(o *options) {
o.logger = logger
}
}
// HostPort creates an Option that sets the hostPort of the local agent that contains the baggage restrictions.
func (options) HostPort(hostPort string) Option {
return func(o *options) {
o.hostPort = hostPort
}
}
// RefreshInterval creates an Option that sets how often the RestrictionManager will poll local agent for
// the baggage restrictions.
func (options) RefreshInterval(refreshInterval time.Duration) Option {
return func(o *options) {
o.refreshInterval = refreshInterval
}
}
func applyOptions(o ...Option) options {
opts := options{}
for _, option := range o {
option(&opts)
}
if opts.metrics == nil {
opts.metrics = jaeger.NewNullMetrics()
}
if opts.logger == nil {
opts.logger = jaeger.NullLogger
}
if opts.hostPort == "" {
opts.hostPort = defaultHostPort
}
if opts.refreshInterval == 0 {
opts.refreshInterval = defaultRefreshInterval
}
return opts
}

157
vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/restriction_manager.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
"fmt"
"net/url"
"sync"
"time"
"github.com/uber/jaeger-client-go/internal/baggage"
thrift "github.com/uber/jaeger-client-go/thrift-gen/baggage"
"github.com/uber/jaeger-client-go/utils"
)
type httpBaggageRestrictionManagerProxy struct {
url string
}
func newHTTPBaggageRestrictionManagerProxy(hostPort, serviceName string) *httpBaggageRestrictionManagerProxy {
v := url.Values{}
v.Set("service", serviceName)
return &httpBaggageRestrictionManagerProxy{
url: fmt.Sprintf("http://%s/baggageRestrictions?%s", hostPort, v.Encode()),
}
}
func (s *httpBaggageRestrictionManagerProxy) GetBaggageRestrictions(serviceName string) ([]*thrift.BaggageRestriction, error) {
var out []*thrift.BaggageRestriction
if err := utils.GetJSON(s.url, &out); err != nil {
return nil, err
}
return out, nil
}
// RestrictionManager manages baggage restrictions by retrieving baggage restrictions from agent
type RestrictionManager struct {
options
mux sync.RWMutex
serviceName string
restrictions map[string]*baggage.Restriction
thriftProxy thrift.BaggageRestrictionManager
pollStopped sync.WaitGroup
stopPoll chan struct{}
invalidRestriction *baggage.Restriction
validRestriction *baggage.Restriction
// Determines if the manager has successfully retrieved baggage restrictions from agent
initialized bool
}
// NewRestrictionManager returns a BaggageRestrictionManager that polls the agent for the latest
// baggage restrictions.
func NewRestrictionManager(serviceName string, options ...Option) *RestrictionManager {
// TODO there is a developing use case where a single tracer can generate traces on behalf of many services.
// restrictionsMap will need to exist per service
opts := applyOptions(options...)
m := &RestrictionManager{
serviceName: serviceName,
options: opts,
restrictions: make(map[string]*baggage.Restriction),
thriftProxy: newHTTPBaggageRestrictionManagerProxy(opts.hostPort, serviceName),
stopPoll: make(chan struct{}),
invalidRestriction: baggage.NewRestriction(false, 0),
validRestriction: baggage.NewRestriction(true, defaultMaxValueLength),
}
m.pollStopped.Add(1)
go m.pollManager()
return m
}
// isReady returns true if the manager has retrieved baggage restrictions from the remote source.
func (m *RestrictionManager) isReady() bool {
m.mux.RLock()
defer m.mux.RUnlock()
return m.initialized
}
// GetRestriction implements RestrictionManager#GetRestriction.
func (m *RestrictionManager) GetRestriction(service, key string) *baggage.Restriction {
m.mux.RLock()
defer m.mux.RUnlock()
if !m.initialized {
if m.denyBaggageOnInitializationFailure {
return m.invalidRestriction
}
return m.validRestriction
}
if restriction, ok := m.restrictions[key]; ok {
return restriction
}
return m.invalidRestriction
}
// Close stops remote polling and closes the RemoteRestrictionManager.
func (m *RestrictionManager) Close() error {
close(m.stopPoll)
m.pollStopped.Wait()
return nil
}
func (m *RestrictionManager) pollManager() {
defer m.pollStopped.Done()
// attempt to initialize baggage restrictions
if err := m.updateRestrictions(); err != nil {
m.logger.Error(fmt.Sprintf("Failed to initialize baggage restrictions: %s", err.Error()))
}
ticker := time.NewTicker(m.refreshInterval)
defer ticker.Stop()
for {
select {
case <-ticker.C:
if err := m.updateRestrictions(); err != nil {
m.logger.Error(fmt.Sprintf("Failed to update baggage restrictions: %s", err.Error()))
}
case <-m.stopPoll:
return
}
}
}
func (m *RestrictionManager) updateRestrictions() error {
restrictions, err := m.thriftProxy.GetBaggageRestrictions(m.serviceName)
if err != nil {
m.metrics.BaggageRestrictionsUpdateFailure.Inc(1)
return err
}
newRestrictions := m.parseRestrictions(restrictions)
m.metrics.BaggageRestrictionsUpdateSuccess.Inc(1)
m.mux.Lock()
defer m.mux.Unlock()
m.initialized = true
m.restrictions = newRestrictions
return nil
}
func (m *RestrictionManager) parseRestrictions(restrictions []*thrift.BaggageRestriction) map[string]*baggage.Restriction {
setters := make(map[string]*baggage.Restriction, len(restrictions))
for _, restriction := range restrictions {
setters[restriction.BaggageKey] = baggage.NewRestriction(true, int(restriction.MaxValueLength))
}
return setters
}

71
vendor/github.com/uber/jaeger-client-go/internal/baggage/restriction_manager.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package baggage
const (
defaultMaxValueLength = 2048
)
// Restriction determines whether a baggage key is allowed and contains any restrictions on the baggage value.
type Restriction struct {
keyAllowed bool
maxValueLength int
}
// NewRestriction returns a new Restriction.
func NewRestriction(keyAllowed bool, maxValueLength int) *Restriction {
return &Restriction{
keyAllowed: keyAllowed,
maxValueLength: maxValueLength,
}
}
// KeyAllowed returns whether the baggage key for this restriction is allowed.
func (r *Restriction) KeyAllowed() bool {
return r.keyAllowed
}
// MaxValueLength returns the max length for the baggage value.
func (r *Restriction) MaxValueLength() int {
return r.maxValueLength
}
// RestrictionManager keeps track of valid baggage keys and their restrictions. The manager
// will return a Restriction for a specific baggage key which will determine whether the baggage
// key is allowed for the current service and any other applicable restrictions on the baggage
// value.
type RestrictionManager interface {
GetRestriction(service, key string) *Restriction
}
// DefaultRestrictionManager allows any baggage key.
type DefaultRestrictionManager struct {
defaultRestriction *Restriction
}
// NewDefaultRestrictionManager returns a DefaultRestrictionManager.
func NewDefaultRestrictionManager(maxValueLength int) *DefaultRestrictionManager {
if maxValueLength == 0 {
maxValueLength = defaultMaxValueLength
}
return &DefaultRestrictionManager{
defaultRestriction: &Restriction{keyAllowed: true, maxValueLength: maxValueLength},
}
}
// GetRestriction implements RestrictionManager#GetRestriction.
func (m *DefaultRestrictionManager) GetRestriction(service, key string) *Restriction {
return m.defaultRestriction
}

81
vendor/github.com/uber/jaeger-client-go/internal/spanlog/json.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package spanlog
import (
"encoding/json"
"fmt"
"github.com/opentracing/opentracing-go/log"
)
type fieldsAsMap map[string]string
// MaterializeWithJSON converts log Fields into JSON string
// TODO refactor into pluggable materializer
func MaterializeWithJSON(logFields []log.Field) ([]byte, error) {
fields := fieldsAsMap(make(map[string]string, len(logFields)))
for _, field := range logFields {
field.Marshal(fields)
}
if event, ok := fields["event"]; ok && len(fields) == 1 {
return []byte(event), nil
}
return json.Marshal(fields)
}
func (ml fieldsAsMap) EmitString(key, value string) {
ml[key] = value
}
func (ml fieldsAsMap) EmitBool(key string, value bool) {
ml[key] = fmt.Sprintf("%t", value)
}
func (ml fieldsAsMap) EmitInt(key string, value int) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitInt32(key string, value int32) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitInt64(key string, value int64) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitUint32(key string, value uint32) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitUint64(key string, value uint64) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitFloat32(key string, value float32) {
ml[key] = fmt.Sprintf("%f", value)
}
func (ml fieldsAsMap) EmitFloat64(key string, value float64) {
ml[key] = fmt.Sprintf("%f", value)
}
func (ml fieldsAsMap) EmitObject(key string, value interface{}) {
ml[key] = fmt.Sprintf("%+v", value)
}
func (ml fieldsAsMap) EmitLazyLogger(value log.LazyLogger) {
value(ml)
}

99
vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/options.go generated vendored Normal file
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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
"time"
"github.com/uber/jaeger-client-go"
)
const (
defaultHostPort = "localhost:5778"
defaultRefreshInterval = time.Second * 5
)
// Option is a function that sets some option on the Throttler
type Option func(options *options)
// Options is a factory for all available options
var Options options
type options struct {
metrics *jaeger.Metrics
logger jaeger.Logger
hostPort string
refreshInterval time.Duration
synchronousInitialization bool
}
// Metrics creates an Option that initializes Metrics on the Throttler, which is used to emit statistics.
func (options) Metrics(m *jaeger.Metrics) Option {
return func(o *options) {
o.metrics = m
}
}
// Logger creates an Option that sets the logger used by the Throttler.
func (options) Logger(logger jaeger.Logger) Option {
return func(o *options) {
o.logger = logger
}
}
// HostPort creates an Option that sets the hostPort of the local agent that keeps track of credits.
func (options) HostPort(hostPort string) Option {
return func(o *options) {
o.hostPort = hostPort
}
}
// RefreshInterval creates an Option that sets how often the Throttler will poll local agent for
// credits.
func (options) RefreshInterval(refreshInterval time.Duration) Option {
return func(o *options) {
o.refreshInterval = refreshInterval
}
}
// SynchronousInitialization creates an Option that determines whether the throttler should synchronously
// fetch credits from the agent when an operation is seen for the first time. This should be set to true
// if the client will be used by a short lived service that needs to ensure that credits are fetched upfront
// such that sampling or throttling occurs.
func (options) SynchronousInitialization(b bool) Option {
return func(o *options) {
o.synchronousInitialization = b
}
}
func applyOptions(o ...Option) options {
opts := options{}
for _, option := range o {
option(&opts)
}
if opts.metrics == nil {
opts.metrics = jaeger.NewNullMetrics()
}
if opts.logger == nil {
opts.logger = jaeger.NullLogger
}
if opts.hostPort == "" {
opts.hostPort = defaultHostPort
}
if opts.refreshInterval == 0 {
opts.refreshInterval = defaultRefreshInterval
}
return opts
}

216
vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/throttler.go generated vendored Normal file
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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
"fmt"
"net/url"
"sync"
"sync/atomic"
"time"
"github.com/pkg/errors"
"github.com/uber/jaeger-client-go"
"github.com/uber/jaeger-client-go/utils"
)
const (
// minimumCredits is the minimum amount of credits necessary to not be throttled.
// i.e. if currentCredits > minimumCredits, then the operation will not be throttled.
minimumCredits = 1.0
)
var (
errorUUIDNotSet = errors.New("Throttler UUID must be set")
)
type operationBalance struct {
Operation string `json:"operation"`
Balance float64 `json:"balance"`
}
type creditResponse struct {
Balances []operationBalance `json:"balances"`
}
type httpCreditManagerProxy struct {
hostPort string
}
func newHTTPCreditManagerProxy(hostPort string) *httpCreditManagerProxy {
return &httpCreditManagerProxy{
hostPort: hostPort,
}
}
// N.B. Operations list must not be empty.
func (m *httpCreditManagerProxy) FetchCredits(uuid, serviceName string, operations []string) (*creditResponse, error) {
params := url.Values{}
params.Set("service", serviceName)
params.Set("uuid", uuid)
for _, op := range operations {
params.Add("operations", op)
}
var resp creditResponse
if err := utils.GetJSON(fmt.Sprintf("http://%s/credits?%s", m.hostPort, params.Encode()), &resp); err != nil {
return nil, errors.Wrap(err, "Failed to receive credits from agent")
}
return &resp, nil
}
// Throttler retrieves credits from agent and uses it to throttle operations.
type Throttler struct {
options
mux sync.RWMutex
service string
uuid atomic.Value
creditManager *httpCreditManagerProxy
credits map[string]float64 // map of operation->credits
close chan struct{}
stopped sync.WaitGroup
}
// NewThrottler returns a Throttler that polls agent for credits and uses them to throttle
// the service.
func NewThrottler(service string, options ...Option) *Throttler {
opts := applyOptions(options...)
creditManager := newHTTPCreditManagerProxy(opts.hostPort)
t := &Throttler{
options: opts,
creditManager: creditManager,
service: service,
credits: make(map[string]float64),
close: make(chan struct{}),
}
t.stopped.Add(1)
go t.pollManager()
return t
}
// IsAllowed implements Throttler#IsAllowed.
func (t *Throttler) IsAllowed(operation string) bool {
t.mux.Lock()
defer t.mux.Unlock()
value, ok := t.credits[operation]
if !ok || value == 0 {
if !ok {
// NOTE: This appears to be a no-op at first glance, but it stores
// the operation key in the map. Necessary for functionality of
// Throttler#operations method.
t.credits[operation] = 0
}
if !t.synchronousInitialization {
t.metrics.ThrottledDebugSpans.Inc(1)
return false
}
// If it is the first time this operation is being checked, synchronously fetch
// the credits.
credits, err := t.fetchCredits([]string{operation})
if err != nil {
// Failed to receive credits from agent, try again next time
t.logger.Error("Failed to fetch credits: " + err.Error())
return false
}
if len(credits.Balances) == 0 {
// This shouldn't happen but just in case
return false
}
for _, opBalance := range credits.Balances {
t.credits[opBalance.Operation] += opBalance.Balance
}
}
return t.isAllowed(operation)
}
// Close stops the throttler from fetching credits from remote.
func (t *Throttler) Close() error {
close(t.close)
t.stopped.Wait()
return nil
}
// SetProcess implements ProcessSetter#SetProcess. It's imperative that the UUID is set before any remote
// requests are made.
func (t *Throttler) SetProcess(process jaeger.Process) {
if process.UUID != "" {
t.uuid.Store(process.UUID)
}
}
// N.B. This function must be called with the Write Lock
func (t *Throttler) isAllowed(operation string) bool {
credits := t.credits[operation]
if credits < minimumCredits {
t.metrics.ThrottledDebugSpans.Inc(1)
return false
}
t.credits[operation] = credits - minimumCredits
return true
}
func (t *Throttler) pollManager() {
defer t.stopped.Done()
ticker := time.NewTicker(t.refreshInterval)
defer ticker.Stop()
for {
select {
case <-ticker.C:
t.refreshCredits()
case <-t.close:
return
}
}
}
func (t *Throttler) operations() []string {
t.mux.RLock()
defer t.mux.RUnlock()
operations := make([]string, 0, len(t.credits))
for op := range t.credits {
operations = append(operations, op)
}
return operations
}
func (t *Throttler) refreshCredits() {
operations := t.operations()
if len(operations) == 0 {
return
}
newCredits, err := t.fetchCredits(operations)
if err != nil {
t.metrics.ThrottlerUpdateFailure.Inc(1)
t.logger.Error("Failed to fetch credits: " + err.Error())
return
}
t.metrics.ThrottlerUpdateSuccess.Inc(1)
t.mux.Lock()
defer t.mux.Unlock()
for _, opBalance := range newCredits.Balances {
t.credits[opBalance.Operation] += opBalance.Balance
}
}
func (t *Throttler) fetchCredits(operations []string) (*creditResponse, error) {
uuid := t.uuid.Load()
uuidStr, _ := uuid.(string)
if uuid == nil || uuidStr == "" {
return nil, errorUUIDNotSet
}
return t.creditManager.FetchCredits(uuidStr, t.service, operations)
}

32
vendor/github.com/uber/jaeger-client-go/internal/throttler/throttler.go generated vendored Normal file
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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package throttler
// Throttler is used to rate limits operations. For example, given how debug spans
// are always sampled, a throttler can be enabled per client to rate limit the amount
// of debug spans a client can start.
type Throttler interface {
// IsAllowed determines whether the operation should be allowed and not be
// throttled.
IsAllowed(operation string) bool
}
// DefaultThrottler doesn't throttle at all.
type DefaultThrottler struct{}
// IsAllowed implements Throttler#IsAllowed.
func (t DefaultThrottler) IsAllowed(operation string) bool {
return true
}

55
vendor/github.com/uber/jaeger-client-go/interop.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"github.com/opentracing/opentracing-go"
)
// TODO this file should not be needed after TChannel PR.
type formatKey int
// SpanContextFormat is a constant used as OpenTracing Format.
// Requires *SpanContext as carrier.
// This format is intended for interop with TChannel or other Zipkin-like tracers.
const SpanContextFormat formatKey = iota
type jaegerTraceContextPropagator struct {
tracer *Tracer
}
func (p *jaegerTraceContextPropagator) Inject(
ctx SpanContext,
abstractCarrier interface{},
) error {
carrier, ok := abstractCarrier.(*SpanContext)
if !ok {
return opentracing.ErrInvalidCarrier
}
carrier.CopyFrom(&ctx)
return nil
}
func (p *jaegerTraceContextPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
carrier, ok := abstractCarrier.(*SpanContext)
if !ok {
return emptyContext, opentracing.ErrInvalidCarrier
}
ctx := new(SpanContext)
ctx.CopyFrom(carrier)
return *ctx, nil
}

84
vendor/github.com/uber/jaeger-client-go/jaeger_tag.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"fmt"
"github.com/opentracing/opentracing-go/log"
j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
)
type tags []*j.Tag
// ConvertLogsToJaegerTags converts log Fields into jaeger tags.
func ConvertLogsToJaegerTags(logFields []log.Field) []*j.Tag {
fields := tags(make([]*j.Tag, 0, len(logFields)))
for _, field := range logFields {
field.Marshal(&fields)
}
return fields
}
func (t *tags) EmitString(key, value string) {
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_STRING, VStr: &value})
}
func (t *tags) EmitBool(key string, value bool) {
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_BOOL, VBool: &value})
}
func (t *tags) EmitInt(key string, value int) {
vLong := int64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
}
func (t *tags) EmitInt32(key string, value int32) {
vLong := int64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
}
func (t *tags) EmitInt64(key string, value int64) {
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &value})
}
func (t *tags) EmitUint32(key string, value uint32) {
vLong := int64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
}
func (t *tags) EmitUint64(key string, value uint64) {
vLong := int64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
}
func (t *tags) EmitFloat32(key string, value float32) {
vDouble := float64(value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_DOUBLE, VDouble: &vDouble})
}
func (t *tags) EmitFloat64(key string, value float64) {
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_DOUBLE, VDouble: &value})
}
func (t *tags) EmitObject(key string, value interface{}) {
vStr := fmt.Sprintf("%+v", value)
*t = append(*t, &j.Tag{Key: key, VType: j.TagType_STRING, VStr: &vStr})
}
func (t *tags) EmitLazyLogger(value log.LazyLogger) {
value(t)
}

179
vendor/github.com/uber/jaeger-client-go/jaeger_thrift_span.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"time"
"github.com/opentracing/opentracing-go"
j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
"github.com/uber/jaeger-client-go/utils"
)
// BuildJaegerThrift builds jaeger span based on internal span.
func BuildJaegerThrift(span *Span) *j.Span {
span.Lock()
defer span.Unlock()
startTime := utils.TimeToMicrosecondsSinceEpochInt64(span.startTime)
duration := span.duration.Nanoseconds() / int64(time.Microsecond)
jaegerSpan := &j.Span{
TraceIdLow: int64(span.context.traceID.Low),
TraceIdHigh: int64(span.context.traceID.High),
SpanId: int64(span.context.spanID),
ParentSpanId: int64(span.context.parentID),
OperationName: span.operationName,
Flags: int32(span.context.flags),
StartTime: startTime,
Duration: duration,
Tags: buildTags(span.tags, span.tracer.options.maxTagValueLength),
Logs: buildLogs(span.logs),
References: buildReferences(span.references),
}
return jaegerSpan
}
// BuildJaegerProcessThrift creates a thrift Process type.
func BuildJaegerProcessThrift(span *Span) *j.Process {
span.Lock()
defer span.Unlock()
return buildJaegerProcessThrift(span.tracer)
}
func buildJaegerProcessThrift(tracer *Tracer) *j.Process {
process := &j.Process{
ServiceName: tracer.serviceName,
Tags: buildTags(tracer.tags, tracer.options.maxTagValueLength),
}
if tracer.process.UUID != "" {
process.Tags = append(process.Tags, &j.Tag{Key: TracerUUIDTagKey, VStr: &tracer.process.UUID, VType: j.TagType_STRING})
}
return process
}
func buildTags(tags []Tag, maxTagValueLength int) []*j.Tag {
jTags := make([]*j.Tag, 0, len(tags))
for _, tag := range tags {
jTag := buildTag(&tag, maxTagValueLength)
jTags = append(jTags, jTag)
}
return jTags
}
func buildLogs(logs []opentracing.LogRecord) []*j.Log {
jLogs := make([]*j.Log, 0, len(logs))
for _, log := range logs {
jLog := &j.Log{
Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(log.Timestamp),
Fields: ConvertLogsToJaegerTags(log.Fields),
}
jLogs = append(jLogs, jLog)
}
return jLogs
}
func buildTag(tag *Tag, maxTagValueLength int) *j.Tag {
jTag := &j.Tag{Key: tag.key}
switch value := tag.value.(type) {
case string:
vStr := truncateString(value, maxTagValueLength)
jTag.VStr = &vStr
jTag.VType = j.TagType_STRING
case []byte:
if len(value) > maxTagValueLength {
value = value[:maxTagValueLength]
}
jTag.VBinary = value
jTag.VType = j.TagType_BINARY
case int:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case int8:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint8:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case int16:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint16:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case int32:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint32:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case int64:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case uint64:
vLong := int64(value)
jTag.VLong = &vLong
jTag.VType = j.TagType_LONG
case float32:
vDouble := float64(value)
jTag.VDouble = &vDouble
jTag.VType = j.TagType_DOUBLE
case float64:
vDouble := float64(value)
jTag.VDouble = &vDouble
jTag.VType = j.TagType_DOUBLE
case bool:
vBool := value
jTag.VBool = &vBool
jTag.VType = j.TagType_BOOL
default:
vStr := truncateString(stringify(value), maxTagValueLength)
jTag.VStr = &vStr
jTag.VType = j.TagType_STRING
}
return jTag
}
func buildReferences(references []Reference) []*j.SpanRef {
retMe := make([]*j.SpanRef, 0, len(references))
for _, ref := range references {
if ref.Type == opentracing.ChildOfRef {
retMe = append(retMe, spanRef(ref.Context, j.SpanRefType_CHILD_OF))
} else if ref.Type == opentracing.FollowsFromRef {
retMe = append(retMe, spanRef(ref.Context, j.SpanRefType_FOLLOWS_FROM))
}
}
return retMe
}
func spanRef(ctx SpanContext, refType j.SpanRefType) *j.SpanRef {
return &j.SpanRef{
RefType: refType,
TraceIdLow: int64(ctx.traceID.Low),
TraceIdHigh: int64(ctx.traceID.High),
SpanId: int64(ctx.spanID),
}
}

90
vendor/github.com/uber/jaeger-client-go/log/logger.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package log
import (
"bytes"
"fmt"
"log"
"sync"
)
// Logger provides an abstract interface for logging from Reporters.
// Applications can provide their own implementation of this interface to adapt
// reporters logging to whatever logging library they prefer (stdlib log,
// logrus, go-logging, etc).
type Logger interface {
// Error logs a message at error priority
Error(msg string)
// Infof logs a message at info priority
Infof(msg string, args ...interface{})
}
// StdLogger is implementation of the Logger interface that delegates to default `log` package
var StdLogger = &stdLogger{}
type stdLogger struct{}
func (l *stdLogger) Error(msg string) {
log.Printf("ERROR: %s", msg)
}
// Infof logs a message at info priority
func (l *stdLogger) Infof(msg string, args ...interface{}) {
log.Printf(msg, args...)
}
// NullLogger is implementation of the Logger interface that is no-op
var NullLogger = &nullLogger{}
type nullLogger struct{}
func (l *nullLogger) Error(msg string) {}
func (l *nullLogger) Infof(msg string, args ...interface{}) {}
// BytesBufferLogger implements Logger backed by a bytes.Buffer.
type BytesBufferLogger struct {
mux sync.Mutex
buf bytes.Buffer
}
// Error implements Logger.
func (l *BytesBufferLogger) Error(msg string) {
l.mux.Lock()
l.buf.WriteString(fmt.Sprintf("ERROR: %s\n", msg))
l.mux.Unlock()
}
// Infof implements Logger.
func (l *BytesBufferLogger) Infof(msg string, args ...interface{}) {
l.mux.Lock()
l.buf.WriteString("INFO: " + fmt.Sprintf(msg, args...) + "\n")
l.mux.Unlock()
}
// String returns string representation of the underlying buffer.
func (l *BytesBufferLogger) String() string {
l.mux.Lock()
defer l.mux.Unlock()
return l.buf.String()
}
// Flush empties the underlying buffer.
func (l *BytesBufferLogger) Flush() {
l.mux.Lock()
defer l.mux.Unlock()
l.buf.Reset()
}

53
vendor/github.com/uber/jaeger-client-go/logger.go generated vendored Normal file
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import "log"
// NB This will be deprecated in 3.0.0, please use jaeger-client-go/log/logger instead.
// Logger provides an abstract interface for logging from Reporters.
// Applications can provide their own implementation of this interface to adapt
// reporters logging to whatever logging library they prefer (stdlib log,
// logrus, go-logging, etc).
type Logger interface {
// Error logs a message at error priority
Error(msg string)
// Infof logs a message at info priority
Infof(msg string, args ...interface{})
}
// StdLogger is implementation of the Logger interface that delegates to default `log` package
var StdLogger = &stdLogger{}
type stdLogger struct{}
func (l *stdLogger) Error(msg string) {
log.Printf("ERROR: %s", msg)
}
// Infof logs a message at info priority
func (l *stdLogger) Infof(msg string, args ...interface{}) {
log.Printf(msg, args...)
}
// NullLogger is implementation of the Logger interface that delegates to default `log` package
var NullLogger = &nullLogger{}
type nullLogger struct{}
func (l *nullLogger) Error(msg string) {}
func (l *nullLogger) Infof(msg string, args ...interface{}) {}

107
vendor/github.com/uber/jaeger-client-go/metrics.go generated vendored Normal file
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// Copyright (c) 2017-2018 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jaeger
import (
"github.com/uber/jaeger-lib/metrics"
)
// Metrics is a container of all stats emitted by Jaeger tracer.
type Metrics struct {
// Number of traces started by this tracer as sampled
TracesStartedSampled metrics.Counter `metric:"traces" tags:"state=started,sampled=y"`
// Number of traces started by this tracer as not sampled
TracesStartedNotSampled metrics.Counter `metric:"traces" tags:"state=started,sampled=n"`
// Number of externally started sampled traces this tracer joined
TracesJoinedSampled metrics.Counter `metric:"traces" tags:"state=joined,sampled=y"`
// Number of externally started not-sampled traces this tracer joined
TracesJoinedNotSampled metrics.Counter `metric:"traces" tags:"state=joined,sampled=n"`
// Number of sampled spans started by this tracer
SpansStartedSampled metrics.Counter `metric:"started_spans" tags:"sampled=y"`
// Number of unsampled spans started by this tracer
SpansStartedNotSampled metrics.Counter `metric:"started_spans" tags:"sampled=n"`
// Number of spans finished by this tracer
SpansFinished metrics.Counter `metric:"finished_spans"`
// Number of errors decoding tracing context
DecodingErrors metrics.Counter `metric:"span_context_decoding_errors"`
// Number of spans successfully reported
ReporterSuccess metrics.Counter `metric:"reporter_spans" tags:"result=ok"`
// Number of spans not reported due to a Sender failure
ReporterFailure metrics.Counter `metric:"reporter_spans" tags:"result=err"`
// Number of spans dropped due to internal queue overflow
ReporterDropped metrics.Counter `metric:"reporter_spans" tags:"result=dropped"`
// Current number of spans in the reporter queue
ReporterQueueLength metrics.Gauge `metric:"reporter_queue_length"`
// Number of times the Sampler succeeded to retrieve sampling strategy
SamplerRetrieved metrics.Counter `metric:"sampler_queries" tags:"result=ok"`
// Number of times the Sampler failed to retrieve sampling strategy
SamplerQueryFailure metrics.Counter `metric:"sampler_queries" tags:"result=err"`
// Number of times the Sampler succeeded to retrieve and update sampling strategy
SamplerUpdated metrics.Counter `metric:"sampler_updates" tags:"result=ok"`
// Number of times the Sampler failed to update sampling strategy
SamplerUpdateFailure metrics.Counter `metric:"sampler_updates" tags:"result=err"`
// Number of times baggage was successfully written or updated on spans.
BaggageUpdateSuccess metrics.Counter `metric:"baggage_updates" tags:"result=ok"`
// Number of times baggage failed to write or update on spans.
BaggageUpdateFailure metrics.Counter `metric:"baggage_updates" tags:"result=err"`
// Number of times baggage was truncated as per baggage restrictions.
BaggageTruncate metrics.Counter `metric:"baggage_truncations"`
// Number of times baggage restrictions were successfully updated.
BaggageRestrictionsUpdateSuccess metrics.Counter `metric:"baggage_restrictions_updates" tags:"result=ok"`
// Number of times baggage restrictions failed to update.
BaggageRestrictionsUpdateFailure metrics.Counter `metric:"baggage_restrictions_updates" tags:"result=err"`
// Number of times debug spans were throttled.
ThrottledDebugSpans metrics.Counter `metric:"throttled_debug_spans"`
// Number of times throttler successfully updated.
ThrottlerUpdateSuccess metrics.Counter `metric:"throttler_updates" tags:"result=ok"`
// Number of times throttler failed to update.
ThrottlerUpdateFailure metrics.Counter `metric:"throttler_updates" tags:"result=err"`
}
// NewMetrics creates a new Metrics struct and initializes it.
func NewMetrics(factory metrics.Factory, globalTags map[string]string) *Metrics {
m := &Metrics{}
// TODO the namespace "jaeger" should be configurable (e.g. in all-in-one "jaeger-client" would make more sense)
metrics.Init(m, factory.Namespace("jaeger", nil), globalTags)
return m
}
// NewNullMetrics creates a new Metrics struct that won't report any metrics.
func NewNullMetrics() *Metrics {
return NewMetrics(metrics.NullFactory, nil)
}

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