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Make deriving the NetworkBehaviour more ergonomic (#782)

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This commit is contained in:
Pierre Krieger
2018-12-20 15:21:13 +01:00
committed by GitHub
parent 6be3aca768
commit d10cafa804
7 changed files with 82 additions and 43 deletions
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14
examples/chat.rs
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@ -53,6 +53,7 @@ extern crate env_logger;
extern crate futures;
extern crate libp2p;
extern crate tokio;
extern crate void;
use futures::prelude::*;
use libp2p::{
@ -79,16 +80,19 @@ fn main() {
// In the future, we want to improve libp2p to make this easier to do.
#[derive(NetworkBehaviour)]
struct MyBehaviour<TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite> {
#[behaviour(handler = "on_floodsub")]
floodsub: libp2p::floodsub::Floodsub<TSubstream>,
mdns: libp2p::mdns::Mdns<TSubstream>,
}
impl<TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite> MyBehaviour<TSubstream> {
impl<TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite> libp2p::core::swarm::NetworkBehaviourEventProcess<void::Void> for MyBehaviour<TSubstream> {
fn inject_event(&mut self, _ev: void::Void) {
void::unreachable(_ev)
}
}
impl<TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite> libp2p::core::swarm::NetworkBehaviourEventProcess<libp2p::floodsub::FloodsubMessage> for MyBehaviour<TSubstream> {
// Called when `floodsub` produces an event.
fn on_floodsub<TTopology>(&mut self, message: <libp2p::floodsub::Floodsub<TSubstream> as libp2p::core::swarm::NetworkBehaviour<TTopology>>::OutEvent)
where TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite
{
fn inject_event(&mut self, message: libp2p::floodsub::FloodsubMessage) {
println!("Received: '{:?}' from {:?}", String::from_utf8_lossy(&message.data), message.source);
}
}