162 lines
3.4 KiB
Go
162 lines
3.4 KiB
Go
package splitstore
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import (
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"context"
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"fmt"
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"os"
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"github.com/bmatsuo/lmdb-go/lmdb"
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cid "github.com/ipfs/go-cid"
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"github.com/filecoin-project/go-state-types/abi"
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)
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var TrackingStoreMapSize int64 = 1 << 34 // 16G
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type TrackingStore interface {
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Put(cid.Cid, abi.ChainEpoch) error
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PutBatch([]cid.Cid, abi.ChainEpoch) error
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Get(cid.Cid) (abi.ChainEpoch, error)
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Delete(cid.Cid) error
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Keys(context.Context) (<-chan cid.Cid, error)
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Close() error
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}
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type trackingStore struct {
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env *lmdb.Env
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db lmdb.DBI
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}
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func NewTrackingStore(path string) (TrackingStore, error) {
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env, err := lmdb.NewEnv()
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if err != nil {
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return nil, fmt.Errorf("failed to initialize LMDB env: %w", err)
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}
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if err = env.SetMapSize(TrackingStoreMapSize); err != nil {
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return nil, fmt.Errorf("failed to set LMDB map size: %w", err)
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}
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if err = env.SetMaxDBs(1); err != nil {
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return nil, fmt.Errorf("failed to set LMDB max dbs: %w", err)
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}
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if err = env.SetMaxReaders(1); err != nil {
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return nil, fmt.Errorf("failed to set LMDB max readers: %w", err)
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}
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if st, err := os.Stat(path); os.IsNotExist(err) {
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if err := os.MkdirAll(path, 0777); err != nil {
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return nil, fmt.Errorf("failed to create LMDB data directory at %s: %w", path, err)
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}
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} else if err != nil {
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return nil, fmt.Errorf("failed to stat LMDB data dir: %w", err)
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} else if !st.IsDir() {
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return nil, fmt.Errorf("LMDB path is not a directory %s", path)
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}
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err = env.Open(path, lmdb.NoSync|lmdb.WriteMap|lmdb.MapAsync|lmdb.NoReadahead, 0777)
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if err != nil {
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env.Close() //nolint:errcheck
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return nil, fmt.Errorf("error opening LMDB database: %w", err)
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}
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s := new(trackingStore)
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s.env = env
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err = env.Update(func(txn *lmdb.Txn) (err error) {
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s.db, err = txn.CreateDBI("snoop")
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return err
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})
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if err != nil {
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return nil, err
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}
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return s, nil
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}
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func (s *trackingStore) Put(cid cid.Cid, epoch abi.ChainEpoch) error {
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val := epochToBytes(epoch)
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return s.env.Update(func(txn *lmdb.Txn) error {
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return txn.Put(s.db, cid.Hash(), val, 0)
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})
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}
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func (s *trackingStore) PutBatch(cids []cid.Cid, epoch abi.ChainEpoch) error {
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val := epochToBytes(epoch)
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return s.env.Update(func(txn *lmdb.Txn) error {
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for _, cid := range cids {
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err := txn.Put(s.db, cid.Hash(), val, 0)
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if err != nil {
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return err
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}
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}
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return nil
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})
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}
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func (s *trackingStore) Get(cid cid.Cid) (epoch abi.ChainEpoch, err error) {
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err = s.env.View(func(txn *lmdb.Txn) error {
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txn.RawRead = true
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val, err := txn.Get(s.db, cid.Hash())
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if err != nil {
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return err
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}
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epoch = bytesToEpoch(val)
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return nil
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})
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return
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}
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func (s *trackingStore) Delete(cid cid.Cid) error {
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return s.env.Update(func(txn *lmdb.Txn) error {
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return txn.Del(s.db, cid.Hash(), nil)
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})
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}
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func (s *trackingStore) Keys(ctx context.Context) (<-chan cid.Cid, error) {
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ch := make(chan cid.Cid)
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go func() {
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err := s.env.View(func(txn *lmdb.Txn) error {
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defer close(ch)
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txn.RawRead = true
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cur, err := txn.OpenCursor(s.db)
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if err != nil {
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return err
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}
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defer cur.Close()
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for {
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k, _, err := cur.Get(nil, nil, lmdb.Next)
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if err != nil {
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if lmdb.IsNotFound(err) {
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return nil
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}
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return err
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}
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select {
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case ch <- cid.NewCidV1(cid.Raw, k):
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case <-ctx.Done():
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return nil
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}
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}
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})
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if err != nil {
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log.Errorf("error iterating over tracking store keys: %s", err)
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}
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}()
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return ch, nil
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}
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func (s *trackingStore) Close() error {
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s.env.CloseDBI(s.db)
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return s.env.Close()
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}
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