mirror of
https://github.com/fafhrd91/actix-net
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Merge pull request #17 from neoeinstein/tower-interop
Second iteration on tower interop
This commit is contained in:
commit
14e3933d8b
@ -1,4 +1,60 @@
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//! Utilities to ease interoperability with services based on the `tower-service` crate.
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//! Utilities to provide interoperability between services based on the
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//! `actix-service` and `tower-service` crates.
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//!
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//! ## Example
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//!
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//! In the following example, we take a `RandomService`—which will always
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//! return 4—and wraps it with a middleware that will always add 1 to the
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//! result. This pattern can be further used to wrap services from either
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//! `tower-service` or `actix-service` with middleware provided by the other.
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//!
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//! ```
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//! use actix_tower::ActixServiceExt;
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//! # use futures::{Async, Future};
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//! use actix_service::Service;
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//!
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//! struct RandomService;
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//! impl Service for RandomService {
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//! // …
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//! # type Request = ();
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//! # type Response = u32;
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//! # type Error = ();
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//! # type Future = futures::future::FutureResult<Self::Response, Self::Error>;
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//! #
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//! # fn poll_ready(&mut self) -> futures::Poll<(), Self::Error> {
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//! # Ok(Async::Ready(()))
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//! # }
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//! #
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//! # fn call(&mut self, _req: Self::Request) -> Self::Future {
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//! # futures::finished(4)
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//! # }
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//! }
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//!
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//! struct AddOneMiddleware<S>(S);
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//! impl<S, R> tower_service::Service<R> for AddOneMiddleware<S>
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//! where
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//! S: tower_service::Service<R, Response = u32>,
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//! S::Future: 'static,
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//! {
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//! /// …
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//! # type Response = u32;
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//! # type Error = S::Error;
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//! # type Future = Box<dyn Future<Item = Self::Response, Error = Self::Error>>;
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//! #
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//! # fn poll_ready(&mut self) -> futures::Poll<(), Self::Error> {
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//! # self.0.poll_ready()
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//! # }
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//! #
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//! # fn call(&mut self, req: R) -> Self::Future {
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//! # let fut = self.0.call(req).map(|x| x + 1);
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//! # Box::new(fut)
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//! # }
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//! }
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//!
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//! let mut s = RandomService.wrap_with_tower_middleware(AddOneMiddleware);
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//! assert_eq!(Ok(Async::Ready(())), s.poll_ready());
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//! assert_eq!(Ok(Async::Ready(5)), s.call(()).poll());
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//! ```
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use actix_service::Service as ActixService;
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use std::marker::PhantomData;
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@ -6,40 +62,123 @@ use tower_service::Service as TowerService;
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/// Compatibility wrapper associating a `tower_service::Service` with a particular
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/// `Request` type, so that it can be used as an `actix_service::Service`.
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pub struct TowerCompat<S, R> {
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///
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/// Generally created through convenience methods on the `TowerServiceExt<R>` trait.
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pub struct ActixCompat<S, R> {
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inner: S,
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_phantom: PhantomData<R>,
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}
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impl<S, R> TowerCompat<S, R> {
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impl<S, R> ActixCompat<S, R> {
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/// Wraps a `tower_service::Service` in a compatibility wrapper.
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pub fn new(inner: S) -> Self {
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TowerCompat {
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ActixCompat {
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inner,
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_phantom: PhantomData,
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}
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}
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}
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/// Extension trait for wrapping `tower_service::Service` instances for use as
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/// Extension trait for wrapping a `tower_service::Service` instance for use as
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/// an `actix_service::Service`.
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pub trait TowerServiceExt {
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pub trait TowerServiceExt<R> : TowerService<R> + Sized {
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/// Wraps a `tower_service::Service` in a compatibility wrapper.
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fn compat<R>(self) -> TowerCompat<Self, R>
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where
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Self: TowerService<R> + Sized;
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}
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///
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/// ```
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/// use actix_service::Service;
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/// use actix_tower::TowerServiceExt;
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/// # use futures::{Async, Future};
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///
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/// struct RandomService;
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/// impl<R> tower_service::Service<R> for RandomService {
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/// // …
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/// # type Response = u32;
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/// # type Error = ();
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/// # type Future = futures::future::FutureResult<Self::Response, Self::Error>;
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/// #
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/// # fn poll_ready(&mut self) -> futures::Poll<(), Self::Error> {
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/// # Ok(Async::Ready(()))
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/// # }
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/// #
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/// # fn call(&mut self, _req: R) -> Self::Future {
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/// # futures::finished(4)
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/// # }
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/// }
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///
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/// let mut s = RandomService.into_actix_service();
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/// assert_eq!(Ok(Async::Ready(())), s.poll_ready());
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/// assert_eq!(Ok(Async::Ready(4)), s.call(()).poll());
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/// ```
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fn into_actix_service(self) -> ActixCompat<Self, R> {
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ActixCompat::new(self)
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}
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impl<S> TowerServiceExt for S {
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fn compat<R>(self) -> TowerCompat<Self, R>
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/// Takes a function that, when provided with an `actix_service::Service` wraps it
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/// and returns a new service. Useful for wrapping a `tower_service::Service` with
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/// middleware built for `actix_service`.
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///
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/// ```
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/// use actix_tower::TowerServiceExt;
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/// # use futures::{Async, Future};
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/// use tower_service::Service;
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///
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/// struct RandomService;
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/// impl<R> Service<R> for RandomService {
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/// // …
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/// # type Response = u32;
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/// # type Error = ();
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/// # type Future = futures::future::FutureResult<Self::Response, Self::Error>;
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/// #
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/// # fn poll_ready(&mut self) -> futures::Poll<(), Self::Error> {
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/// # Ok(Async::Ready(()))
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/// # }
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/// #
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/// # fn call(&mut self, _req: R) -> Self::Future {
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/// # futures::finished(4)
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/// # }
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/// }
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///
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/// struct AddOneTransform<S>(S);
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/// impl<S> actix_service::Service for AddOneTransform<S>
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/// where
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/// S: actix_service::Service<Response = u32>,
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/// S::Future: 'static,
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/// {
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/// /// …
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/// # type Request = S::Request;
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/// # type Response = u32;
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/// # type Error = S::Error;
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/// # type Future = Box<dyn Future<Item = Self::Response, Error = Self::Error>>;
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/// #
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/// # fn poll_ready(&mut self) -> futures::Poll<(), Self::Error> {
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/// # self.0.poll_ready()
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/// # }
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/// #
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/// # fn call(&mut self, req: Self::Request) -> Self::Future {
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/// # let fut = self.0.call(req).map(|x| x + 1);
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/// # Box::new(fut)
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/// # }
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/// }
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///
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/// let mut s = RandomService.wrap_with_actix_middleware(AddOneTransform);
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/// assert_eq!(Ok(Async::Ready(())), s.poll_ready());
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/// assert_eq!(Ok(Async::Ready(5)), s.call(()).poll());
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/// ```
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fn wrap_with_actix_middleware<F, U>(self, f: F) -> TowerCompat<U>
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where
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Self: TowerService<R> + Sized
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F: FnOnce(ActixCompat<Self, R>) -> U,
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U: ActixService<Request = R>
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{
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TowerCompat::new(self)
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f(self.into_actix_service()).into_tower_service()
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}
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}
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impl<S, R> ActixService for TowerCompat<S, R>
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impl<S, R> TowerServiceExt<R> for S
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where
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S: TowerService<R> + Sized
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{}
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impl<S, R> ActixService for ActixCompat<S, R>
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where
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S: TowerService<R>,
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{
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@ -57,135 +196,392 @@ where
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}
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}
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/// Compatibility wrapper associating an `actix_service::Service` with a particular
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/// `Request` type, so that it can be used as a `tower_service::Service`.
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///
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/// Generally created through convenience methods on the `ActixServiceExt<R>` trait.
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pub struct TowerCompat<S> {
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inner: S,
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}
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impl<S> TowerCompat<S> {
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/// Wraps an `actix_service::Service` in a compatibility wrapper.
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pub fn new(inner: S) -> Self {
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TowerCompat {
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inner,
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}
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}
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}
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/// Extension trait for wrapping an `actix_service::Service` instance for use as
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/// a `tower_service::Service`.
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pub trait ActixServiceExt: ActixService + Sized {
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/// Wraps a `tower_service::Service` in a compatibility wrapper.
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///
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/// ```
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/// use actix_tower::ActixServiceExt;
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/// # use futures::{Async, Future};
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/// use tower_service::Service;
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///
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/// struct RandomService;
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/// impl actix_service::Service for RandomService {
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/// // …
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/// # type Request = ();
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/// # type Response = u32;
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/// # type Error = ();
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/// # type Future = futures::future::FutureResult<Self::Response, Self::Error>;
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/// #
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/// # fn poll_ready(&mut self) -> futures::Poll<(), Self::Error> {
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/// # Ok(Async::Ready(()))
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/// # }
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/// #
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/// # fn call(&mut self, _req: Self::Request) -> Self::Future {
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/// # futures::finished(4)
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/// # }
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/// }
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///
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/// let mut s = RandomService.into_tower_service();
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/// assert_eq!(Ok(Async::Ready(())), s.poll_ready());
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/// assert_eq!(Ok(Async::Ready(4)), s.call(()).poll());
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/// ```
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fn into_tower_service(self) -> TowerCompat<Self> {
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TowerCompat::new(self)
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}
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/// Takes a function that, when provided with a `tower_service::Service` wraps it
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/// and returns a new service. Useful for wrapping an `actix_service::Service` with
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/// middleware built for `tower_service`.
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///
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/// ```
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/// use actix_tower::ActixServiceExt;
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/// # use futures::{Async, Future};
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/// use actix_service::Service;
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///
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/// struct RandomService;
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/// impl Service for RandomService {
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/// // …
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/// # type Request = ();
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/// # type Response = u32;
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/// # type Error = ();
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/// # type Future = futures::future::FutureResult<Self::Response, Self::Error>;
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/// #
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/// # fn poll_ready(&mut self) -> futures::Poll<(), Self::Error> {
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/// # Ok(Async::Ready(()))
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/// # }
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/// #
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/// # fn call(&mut self, _req: Self::Request) -> Self::Future {
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/// # futures::finished(4)
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/// # }
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/// }
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///
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/// struct AddOneMiddleware<S>(S);
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/// impl<S, R> tower_service::Service<R> for AddOneMiddleware<S>
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/// where
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/// S: tower_service::Service<R, Response = u32>,
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/// S::Future: 'static,
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/// {
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/// /// …
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/// # type Response = u32;
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/// # type Error = S::Error;
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/// # type Future = Box<dyn Future<Item = Self::Response, Error = Self::Error>>;
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/// #
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/// # fn poll_ready(&mut self) -> futures::Poll<(), Self::Error> {
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/// # self.0.poll_ready()
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/// # }
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/// #
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/// # fn call(&mut self, req: R) -> Self::Future {
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/// # let fut = self.0.call(req).map(|x| x + 1);
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/// # Box::new(fut)
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/// # }
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/// }
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///
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/// let mut s = RandomService.wrap_with_tower_middleware(AddOneMiddleware);
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/// assert_eq!(Ok(Async::Ready(())), s.poll_ready());
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/// assert_eq!(Ok(Async::Ready(5)), s.call(()).poll());
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/// ```
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fn wrap_with_tower_middleware<F, U>(self, f: F) -> ActixCompat<U, Self::Request>
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where
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F: FnOnce(TowerCompat<Self>) -> U,
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U: TowerService<Self::Request>
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{
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f(self.into_tower_service()).into_actix_service()
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}
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}
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impl<S> ActixServiceExt for S
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where
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S: ActixService + Sized
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{}
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impl<S> TowerService<S::Request> for TowerCompat<S>
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where
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S: ActixService,
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{
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type Response = S::Response;
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type Error = S::Error;
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type Future = S::Future;
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fn poll_ready(&mut self) -> futures::Poll<(), Self::Error> {
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ActixService::poll_ready(&mut self.inner)
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}
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fn call(&mut self, req: S::Request) -> Self::Future {
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ActixService::call(&mut self.inner, req)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::TowerServiceExt;
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use actix_service::{Service as ActixService, ServiceExt, Transform};
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use futures::{future::FutureResult, Async, Poll, Future};
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use tower_service::Service as TowerService;
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mod tower_service_into_actix_service {
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use crate::TowerServiceExt;
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use actix_service::{Service as ActixService, ServiceExt, Transform};
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use futures::{future::FutureResult, Async, Poll, Future};
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use tower_service::Service as TowerService;
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struct RandomService;
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impl<R> TowerService<R> for RandomService {
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type Response = u32;
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type Error = ();
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type Future = FutureResult<Self::Response, Self::Error>;
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fn poll_ready(&mut self) -> Poll<(), Self::Error> {
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Ok(Async::Ready(()))
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#[test]
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fn random_service_returns_4() {
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let mut s = RandomService.into_actix_service();
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assert_eq!(Ok(Async::Ready(())), s.poll_ready());
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assert_eq!(Ok(Async::Ready(4)), s.call(()).poll());
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}
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fn call(&mut self, _req: R) -> Self::Future {
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futures::finished(4)
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#[test]
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fn random_service_can_combine() {
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let mut s = RandomService.into_actix_service().map(|x| x + 1);
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assert_eq!(Ok(Async::Ready(())), s.poll_ready());
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assert_eq!(Ok(Async::Ready(5)), s.call(()).poll());
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}
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#[test]
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fn random_service_can_use_actix_middleware() {
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let mut s = RandomService.wrap_with_actix_middleware(DoMathTransform);
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assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
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assert_eq!(Ok(Async::Ready(68)), s.call(()).poll());
|
||||
}
|
||||
|
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#[test]
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fn random_service_and_add_service_chained() {
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let s1 = RandomService.into_actix_service();
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||||
let s2 = AddOneService.into_actix_service();
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let s3 = AddOneService.into_actix_service();
|
||||
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||||
let mut s = s1.and_then(s2).and_then(s3);
|
||||
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||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(6)), s.call(()).poll());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn random_service_and_add_service_and_ignoring_service_chained() {
|
||||
let s1 = RandomService.into_actix_service();
|
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let s2 = AddOneService.into_actix_service();
|
||||
let s3 = AddOneService.into_actix_service();
|
||||
let s4 = RandomService.into_actix_service();
|
||||
|
||||
let mut s = s1.and_then(s2).and_then(s3).and_then(s4);
|
||||
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(4)), s.call(()).poll());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn random_service_can_be_transformed_to_do_math() {
|
||||
let transform = DoMath;
|
||||
|
||||
let mut s = transform.new_transform(RandomService.into_actix_service()).wait().unwrap();
|
||||
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(68)), s.call(()).poll());
|
||||
}
|
||||
|
||||
struct RandomService;
|
||||
impl<R> TowerService<R> for RandomService {
|
||||
type Response = u32;
|
||||
type Error = ();
|
||||
type Future = FutureResult<Self::Response, Self::Error>;
|
||||
|
||||
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
|
||||
Ok(Async::Ready(()))
|
||||
}
|
||||
|
||||
fn call(&mut self, _req: R) -> Self::Future {
|
||||
futures::finished(4)
|
||||
}
|
||||
}
|
||||
|
||||
struct AddOneService;
|
||||
impl TowerService<u32> for AddOneService {
|
||||
type Response = u32;
|
||||
type Error = ();
|
||||
type Future = FutureResult<Self::Response, Self::Error>;
|
||||
|
||||
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
|
||||
Ok(Async::Ready(()))
|
||||
}
|
||||
|
||||
fn call(&mut self, req: u32) -> Self::Future {
|
||||
futures::finished(req + 1)
|
||||
}
|
||||
}
|
||||
|
||||
struct DoMathTransform<S>(S);
|
||||
impl<S> ActixService for DoMathTransform<S>
|
||||
where
|
||||
S: ActixService<Response = u32>,
|
||||
S::Future: 'static,
|
||||
{
|
||||
type Request = S::Request;
|
||||
type Response = u32;
|
||||
type Error = S::Error;
|
||||
type Future = Box<dyn Future<Item = Self::Response, Error = Self::Error>>;
|
||||
|
||||
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
|
||||
self.0.poll_ready()
|
||||
}
|
||||
|
||||
fn call(&mut self, req: Self::Request) -> Self::Future {
|
||||
let fut = self.0.call(req).map(|x| x * 17);
|
||||
Box::new(fut)
|
||||
}
|
||||
}
|
||||
|
||||
struct DoMath;
|
||||
impl<S> Transform<S> for DoMath
|
||||
where
|
||||
S: ActixService<Response = u32>,
|
||||
S::Future: 'static,
|
||||
{
|
||||
type Request = S::Request;
|
||||
type Response = u32;
|
||||
type Error = S::Error;
|
||||
type Transform = DoMathTransform<S>;
|
||||
type InitError = ();
|
||||
type Future = FutureResult<Self::Transform, Self::InitError>;
|
||||
|
||||
fn new_transform(&self, service: S) -> Self::Future {
|
||||
futures::finished(DoMathTransform(service))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tower_service_as_actix_service_returns_4() {
|
||||
let mut s = RandomService.compat();
|
||||
mod actix_service_into_tower_service {
|
||||
use crate::{ActixServiceExt, TowerServiceExt};
|
||||
use actix_service::{Service as ActixService, ServiceExt};
|
||||
use futures::{future::FutureResult, Async, Poll, Future};
|
||||
use tower_service::Service as TowerService;
|
||||
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(4)), s.call(()).poll());
|
||||
}
|
||||
#[test]
|
||||
fn random_service_returns_4() {
|
||||
let mut s = RandomService.into_tower_service();
|
||||
|
||||
#[test]
|
||||
fn tower_service_as_actix_service_can_combine() {
|
||||
let mut s = RandomService.compat().map(|x| x + 1);
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(5)), s.call(()).poll());
|
||||
}
|
||||
|
||||
struct AddOneService;
|
||||
impl TowerService<u32> for AddOneService {
|
||||
type Response = u32;
|
||||
type Error = ();
|
||||
type Future = FutureResult<Self::Response, Self::Error>;
|
||||
|
||||
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
|
||||
Ok(Async::Ready(()))
|
||||
assert_eq!(Ok(Async::Ready(4)), s.call(()).poll());
|
||||
}
|
||||
|
||||
fn call(&mut self, req: u32) -> Self::Future {
|
||||
futures::finished(req + 1)
|
||||
}
|
||||
}
|
||||
#[test]
|
||||
fn random_service_can_use_tower_middleware() {
|
||||
let mut s = AddOneService::wrap(RandomService.into_tower_service()).into_actix_service();
|
||||
|
||||
#[test]
|
||||
fn tower_services_as_actix_services_chained() {
|
||||
let s1 = RandomService.compat();
|
||||
let s2 = AddOneService.compat();
|
||||
let s3 = AddOneService.compat();
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
let mut s = s1.and_then(s2).and_then(s3);
|
||||
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(6)), s.call(()).poll());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tower_services_as_actix_services_chained_2() {
|
||||
let s1 = RandomService.compat();
|
||||
let s2 = AddOneService.compat();
|
||||
let s3 = AddOneService.compat();
|
||||
let s4 = RandomService.compat();
|
||||
|
||||
let mut s = s1.and_then(s2).and_then(s3).and_then(s4);
|
||||
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(4)), s.call(()).poll());
|
||||
}
|
||||
|
||||
struct DoMathTransform<S>(S);
|
||||
impl<S> ActixService for DoMathTransform<S>
|
||||
where
|
||||
S: ActixService<Response = u32>,
|
||||
S::Future: 'static,
|
||||
{
|
||||
type Request = S::Request;
|
||||
type Response = u32;
|
||||
type Error = S::Error;
|
||||
type Future = Box<dyn Future<Item = Self::Response, Error = Self::Error>>;
|
||||
|
||||
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
|
||||
self.0.poll_ready()
|
||||
assert_eq!(Ok(Async::Ready(5)), s.call(()).poll());
|
||||
}
|
||||
|
||||
fn call(&mut self, req: Self::Request) -> Self::Future {
|
||||
let fut = self.0.call(req).map(|x| x * 17);
|
||||
Box::new(fut)
|
||||
#[test]
|
||||
fn do_math_service_can_use_tower_middleware() {
|
||||
let mut s = AddOneService::wrap(DoMathService.into_tower_service()).into_actix_service();
|
||||
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(188)), s.call(11).poll());
|
||||
}
|
||||
}
|
||||
|
||||
struct DoMath;
|
||||
impl<S> Transform<S> for DoMath
|
||||
where
|
||||
S: ActixService<Response = u32>,
|
||||
S::Future: 'static,
|
||||
{
|
||||
type Request = S::Request;
|
||||
type Response = u32;
|
||||
type Error = S::Error;
|
||||
type Transform = DoMathTransform<S>;
|
||||
type InitError = ();
|
||||
type Future = FutureResult<Self::Transform, Self::InitError>;
|
||||
#[test]
|
||||
fn random_service_and_add_service_and_ignoring_service_chained() {
|
||||
let s1 = RandomService.wrap_with_tower_middleware(AddOneService::wrap);
|
||||
let s2 = DoMathService.wrap_with_tower_middleware(AddOneService::wrap);
|
||||
|
||||
fn new_transform(&self, service: S) -> Self::Future {
|
||||
futures::finished(DoMathTransform(service))
|
||||
let mut s = s1.and_then(s2);
|
||||
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
|
||||
assert_eq!(Ok(Async::Ready(86)), s.call(()).poll());
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tower_service_as_actix_service_can_be_transformed() {
|
||||
let transform = DoMath;
|
||||
struct RandomService;
|
||||
impl ActixService for RandomService {
|
||||
type Request = ();
|
||||
type Response = u32;
|
||||
type Error = ();
|
||||
type Future = FutureResult<Self::Response, Self::Error>;
|
||||
|
||||
let mut s = transform.new_transform(RandomService.compat()).wait().unwrap();
|
||||
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
|
||||
Ok(Async::Ready(()))
|
||||
}
|
||||
|
||||
assert_eq!(Ok(Async::Ready(())), s.poll_ready());
|
||||
fn call(&mut self, _req: Self::Request) -> Self::Future {
|
||||
futures::finished(4)
|
||||
}
|
||||
}
|
||||
|
||||
assert_eq!(Ok(Async::Ready(68)), s.call(()).poll());
|
||||
}
|
||||
struct AddOneService<S> {
|
||||
inner: S
|
||||
}
|
||||
|
||||
impl<S> AddOneService<S> {
|
||||
fn wrap(inner: S) -> Self {
|
||||
AddOneService {
|
||||
inner,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<S, R> TowerService<R> for AddOneService<S>
|
||||
where
|
||||
S: TowerService<R, Response = u32>,
|
||||
S::Future: 'static,
|
||||
{
|
||||
type Response = u32;
|
||||
type Error = S::Error;
|
||||
type Future = Box<dyn Future<Item = Self::Response, Error = Self::Error>>;
|
||||
|
||||
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
|
||||
self.inner.poll_ready()
|
||||
}
|
||||
|
||||
fn call(&mut self, req: R) -> Self::Future {
|
||||
let fut = self.inner.call(req)
|
||||
.map(|x| x + 1);
|
||||
|
||||
Box::new(fut)
|
||||
}
|
||||
}
|
||||
|
||||
struct DoMathService;
|
||||
impl ActixService for DoMathService {
|
||||
type Request = u32;
|
||||
type Response = u32;
|
||||
type Error = ();
|
||||
type Future = FutureResult<Self::Response, Self::Error>;
|
||||
|
||||
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
|
||||
Ok(Async::Ready(()))
|
||||
}
|
||||
|
||||
fn call(&mut self, req: Self::Request) -> Self::Future {
|
||||
futures::finished(req * 17)
|
||||
}
|
||||
}}
|
||||
}
|
Loading…
Reference in New Issue
Block a user