pub trait Service<Request> {
type Response;
type Error;
type Future: Future<Output = Result<Self::Response, Self::Error>>;
fn call(&mut self, req: Request) -> Self::Future;
}
Expand description
An asynchronous function from a Request
to a Response
.
The Service
trait is a simplified interface making it easy to write
network applications in a modular and reusable way, decoupled from the
underlying protocol.
Functional
A Service
is a function of a Request
. It immediately returns a
Future
representing the eventual completion of processing the
request. The actual request processing may happen at any time in the
future, on any thread or executor. The processing may depend on calling
other services. At some point in the future, the processing will complete,
and the Future
will resolve to a response or error.
At a high level, the Service::call
function represents an RPC request. The
Service
value can be a server or a client.