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swarm: Split off "keep alive" functionality from DummyConnectionHandler (#2859)

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Previously, the `DummyConnectionHandler` offered a "keep alive" functionality,
i.e. it allowed users to set the value of what is returned from
`ConnectionHandler::keep_alive`. This handler is primarily used in tests or
`NetworkBehaviour`s that don't open any connections (like mDNS). In all of these
cases, it is statically known whether we want to keep connections alive. As
such, this functionality is better represented by a static
`KeepAliveConnectionHandler` that always returns `KeepAlive::Yes` and a
`DummyConnectionHandler` that always returns `KeepAlive::No`.

To follow the naming conventions described in
https://github.com/libp2p/rust-libp2p/issues/2217, we introduce a top-level
`keep_alive` and `dummy` behaviour in `libp2p-swarm` that contains both the
`NetworkBehaviour` and `ConnectionHandler` implementation for either case.
This commit is contained in:
Thomas Eizinger
2022-10-06 03:50:11 +11:00
committed by GitHub
parent da0403dc45
commit bdf9209824
26 changed files with 412 additions and 319 deletions
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17
protocols/rendezvous/examples/discover.rs
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@@ -23,10 +23,11 @@ use libp2p::core::identity;
use libp2p::core::PeerId;
use libp2p::multiaddr::Protocol;
use libp2p::ping;
use libp2p::swarm::SwarmEvent;
use libp2p::swarm::{keep_alive, SwarmEvent};
use libp2p::Swarm;
use libp2p::{development_transport, rendezvous, Multiaddr};
use std::time::Duration;
use void::Void;
const NAMESPACE: &str = "rendezvous";
@@ -44,11 +45,8 @@ async fn main() {
development_transport(identity.clone()).await.unwrap(),
MyBehaviour {
rendezvous: rendezvous::client::Behaviour::new(identity.clone()),
ping: ping::Behaviour::new(
ping::Config::new()
.with_interval(Duration::from_secs(1))
.with_keep_alive(true),
),
ping: ping::Behaviour::new(ping::Config::new().with_interval(Duration::from_secs(1))),
keep_alive: keep_alive::Behaviour,
},
PeerId::from(identity.public()),
);
@@ -139,10 +137,17 @@ impl From<ping::Event> for MyEvent {
}
}
impl From<Void> for MyEvent {
fn from(event: Void) -> Self {
void::unreachable(event)
}
}
#[derive(libp2p::NetworkBehaviour)]
#[behaviour(event_process = false)]
#[behaviour(out_event = "MyEvent")]
struct MyBehaviour {
rendezvous: rendezvous::client::Behaviour,
ping: ping::Behaviour,
keep_alive: keep_alive::Behaviour,
}