Commit Graph

8 Commits

Author SHA1 Message Date
Felix Lange 2e98631c5e
rpc: fix client shutdown hang when Close races with Unsubscribe (#17894)
Fixes #17837
2018-10-15 10:56:04 +02:00
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-vk 5e29f4be93 cmd/utils, node: remove unused solc references and improve RPC config (#14324)
Currently http cors and websocket origins are a comma separated string in the
config object. These are replaced with string arrays that are more expressive in
case of a config file.
2017-04-12 23:04:14 +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 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 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