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use actix_service::{NewService, Service};
use futures::{future, try_ready, Async, Future, IntoFuture, Poll};
pub enum EitherService<A, B> {
A(A),
B(B),
}
impl<A: Clone, B: Clone> Clone for EitherService<A, B> {
fn clone(&self) -> Self {
match self {
EitherService::A(srv) => EitherService::A(srv.clone()),
EitherService::B(srv) => EitherService::B(srv.clone()),
}
}
}
impl<A, B> Service for EitherService<A, B>
where
A: Service,
B: Service<Request = A::Request, Response = A::Response, Error = A::Error>,
{
type Request = A::Request;
type Response = A::Response;
type Error = A::Error;
type Future = future::Either<A::Future, B::Future>;
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
match self {
EitherService::A(ref mut inner) => inner.poll_ready(),
EitherService::B(ref mut inner) => inner.poll_ready(),
}
}
fn call(&mut self, req: A::Request) -> Self::Future {
match self {
EitherService::A(ref mut inner) => future::Either::A(inner.call(req)),
EitherService::B(ref mut inner) => future::Either::B(inner.call(req)),
}
}
}
pub enum Either<A, B> {
A(A),
B(B),
}
impl<A, B> Either<A, B> {
pub fn new_a<C>(srv: A) -> Self
where
A: NewService<C>,
B: NewService<
C,
Request = A::Request,
Response = A::Response,
Error = A::Error,
InitError = A::InitError,
>,
{
Either::A(srv)
}
pub fn new_b<C>(srv: B) -> Self
where
A: NewService<C>,
B: NewService<
C,
Request = A::Request,
Response = A::Response,
Error = A::Error,
InitError = A::InitError,
>,
{
Either::B(srv)
}
}
impl<A, B, C> NewService<C> for Either<A, B>
where
A: NewService<C>,
B: NewService<
C,
Request = A::Request,
Response = A::Response,
Error = A::Error,
InitError = A::InitError,
>,
{
type Request = A::Request;
type Response = A::Response;
type Error = A::Error;
type InitError = A::InitError;
type Service = EitherService<A::Service, B::Service>;
type Future = EitherNewService<A, B, C>;
fn new_service(&self, cfg: &C) -> Self::Future {
match self {
Either::A(ref inner) => EitherNewService::A(inner.new_service(cfg)),
Either::B(ref inner) => EitherNewService::B(inner.new_service(cfg)),
}
}
}
impl<A: Clone, B: Clone> Clone for Either<A, B> {
fn clone(&self) -> Self {
match self {
Either::A(srv) => Either::A(srv.clone()),
Either::B(srv) => Either::B(srv.clone()),
}
}
}
#[doc(hidden)]
pub enum EitherNewService<A: NewService<C>, B: NewService<C>, C> {
A(<A::Future as IntoFuture>::Future),
B(<B::Future as IntoFuture>::Future),
}
impl<A, B, C> Future for EitherNewService<A, B, C>
where
A: NewService<C>,
B: NewService<
C,
Request = A::Request,
Response = A::Response,
Error = A::Error,
InitError = A::InitError,
>,
{
type Item = EitherService<A::Service, B::Service>;
type Error = A::InitError;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
match self {
EitherNewService::A(ref mut fut) => {
let service = try_ready!(fut.poll());
Ok(Async::Ready(EitherService::A(service)))
}
EitherNewService::B(ref mut fut) => {
let service = try_ready!(fut.poll());
Ok(Async::Ready(EitherService::B(service)))
}
}
}
}