go-ethereum

Commit Graph

Author	SHA1	Message	Date
Felix Lange	e32925397b	rpc: add context argument to EthSubscribe It's inconsistent not to pass it and most callers will work with contexts anyway.	8 years ago
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.	8 years ago
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.	8 years ago

Author

SHA1

Message

Date

Felix Lange

e32925397b

rpc: add context argument to EthSubscribe

It's inconsistent not to pass it and most callers will
work with contexts anyway.

8 years ago

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.

8 years ago

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.

8 years ago

3 Commits (09baeec0dabc24050f344272ed36e39687c2b4e8)