Commit Graph

10 Commits

Author SHA1 Message Date
Lewis Marshall
9feec51e2d p2p: add network simulation framework (#14982)
This commit introduces a network simulation framework which
can be used to run simulated networks of devp2p nodes. The
intention is to use this for testing protocols, performing
benchmarks and visualising emergent network behaviour.
2017-09-25 10:08:07 +02:00
Bas van Kervel
b58a501673 whisperv5: integrate whisper and add whisper RPC simulator 2017-06-15 11:53:15 +02:00
Bas van Kervel
37e3f561f1
rpc: support subscriptions under custom namespaces 2017-04-25 11:13:22 +02:00
Felix Lange
c213fd1fd8 all: import "context" instead of "golang.org/x/net/context"
There is no need to depend on the old context package now that the
minimum Go version is 1.7. The move to "context" eliminates our weird
vendoring setup. Some vendored code still uses golang.org/x/net/context
and it is now vendored in the normal way.

This change triggered new vet checks around context.WithTimeout which
didn't fire with golang.org/x/net/context.
2017-03-22 20:49:15 +01:00
Péter Szilágyi
d4fd06c3dc
all: blidly swap out glog to our log15, logs need rework 2017-02-23 12:16:44 +02:00
Felix Lange
a2b4abd89a rpc: send nil on subscription Err channel when Client is closed
This change makes client subscriptions compatible with the new
Subscription semantics introduced in the previous commit.
2017-01-25 18:44:21 +01:00
Felix Lange
e32925397b rpc: add context argument to EthSubscribe
It's inconsistent not to pass it and most callers will
work with contexts anyway.
2016-08-05 20:48:33 +02:00
Felix Lange
f5f042ffdc rpc: ensure client doesn't block for slow subscribers
I initially made the client block if the 100-element buffer was
exceeded. It turns out that this is inconvenient for simple uses of the
client which subscribe and perform calls on the same goroutine, e.g.

    client, _ := rpc.Dial(...)
    ch := make(chan int) // note: no buffer
    sub, _ := client.EthSubscribe(ch, "something")
    for event := range ch {
        client.Call(...)
    }

This innocent looking code will lock up if the server suddenly decides
to send 2000 notifications. In this case, the client's main loop won't
accept the call because it is trying to deliver a notification to ch.

The issue is kind of hard to explain in the docs and few people will
actually read them. Buffering is the simple option and works with close
to no overhead for subscribers that always listen.
2016-08-05 20:48:33 +02:00
Felix Lange
464660651d rpc: don't exceed context deadline while waiting for send lock 2016-08-05 13:27:02 +02:00
Felix Lange
91b7690428 rpc: add new client, use it everywhere
The new client implementation supports concurrent requests,
subscriptions and replaces the various ad hoc RPC clients
throughout go-ethereum.
2016-07-22 23:21:27 +02:00