Trait Upstream 

pub trait Upstream: Send + Sync {
    // Required method
    fn open(
        &self,
    ) -> impl Future<Output = Result<OpenedUpstream, UpstreamError>> + Send;
}

Opens upstreams, one per downstream client.

Called once for each client, and each call is expected to produce a fresh connection. An implementation that hands back the same connection twice reintroduces exactly the sharing this exists to prevent, and a bridge that does it will lose a tools/list_changed or fail to answer a sampling request with no error anywhere to show for it.

Required Methods

fn open( &self, ) -> impl Future<Output = Result<OpenedUpstream, UpstreamError>> + Send

Opens and negotiates one upstream.

Errors

UpstreamError when the server could not be reached or refused the handshake. This is the only failure channel on purpose: a client whose server is unreachable has no bridge to be proxied through, so the caller answers the client rather than starting a loop that would fail on its first frame.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors