Comments (1)
Let's list the types that is cheap to clone
- Arc
- Bytes
- tonic::Channel (see below)
/// # Multiplexing requests
///
/// Sending a request on a channel requires a `&mut self` and thus can only send
/// one request in flight. This is intentional and is required to follow the `Service`
/// contract from the `tower` library which this channel implementation is built on
/// top of.
///
/// `tower` itself has a concept of `poll_ready` which is the main mechanism to apply
/// back pressure. `poll_ready` takes a `&mut self` and when it returns `Poll::Ready`
/// we know the `Service` is able to accept only one request before we must `poll_ready`
/// again. Due to this fact any `async fn` that wants to poll for readiness and submit
/// the request must have a `&mut self` reference.
///
/// To work around this and to ease the use of the channel, `Channel` provides a
/// `Clone` implementation that is _cheap_. This is because at the very top level
/// the channel is backed by a `tower_buffer::Buffer` which runs the connection
/// in a background task and provides a `mpsc` channel interface. Due to this
/// cloning the `Channel` type is cheap and encouraged.
#[derive(Clone)]
pub struct Channel {
svc: Buffer<Svc, Request<BoxBody>>,
}
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Related Issues (20)
- Multi-raft
- Add versioning to membership
- Rework: RaftCore is too monolithic HOT 1
- Support duplicated requests HOT 3
- Load balancer and stable connection HOT 2
- Avoid duplicated response HOT 2
- Multi-Raft: config dissemination HOT 2
- The project name has too low googlability.
- Use cargo-chef in testapp Docker
- Run test in GHA with docker compose
- Bump http-serde to 2.0
- Release v0.10 HOT 1
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- Write doc
- Multiplexed heartbeat HOT 3
- Extend testapp for testing multi-raft
- CI: Cache test artifact
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