pub trait Service<Request> {
type Response;
type Error;
type Future: Future<Output = Result<Self::Response, Self::Error>>;
// Required method
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.