[−][src]Trait actix_service::Service
An asynchronous function from Request
to a Response
.
Associated Types
type Request
Requests handled by the service.
type Response
Responses given by the service.
type Error
Errors produced by the service.
type Future: Future<Item = Self::Response, Error = Self::Error>
The future response value.
Required methods
fn poll_ready(&mut self) -> Poll<(), Self::Error>
Returns Ready
when the service is able to process requests.
If the service is at capacity, then NotReady
is returned and the task
is notified when the service becomes ready again. This function is
expected to be called while on a task.
This is a best effort implementation. False positives are permitted.
It is permitted for the service to return Ready
from a poll_ready
call and the next invocation of call
results in an error.
fn call(&mut self, req: Self::Request) -> Self::Future
Process the request and return the response asynchronously.
This function is expected to be callable off task. As such,
implementations should take care to not call poll_ready
. If the
service is at capacity and the request is unable to be handled, the
returned Future
should resolve to an error.
Calling call
without calling poll_ready
is permitted. The
implementation must be resilient to this fact.
Implementations on Foreign Types
impl<'a, S> Service for &'a mut S where
S: Service + 'a,
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S: Service + 'a,
type Request = S::Request
type Response = S::Response
type Error = S::Error
type Future = S::Future
fn poll_ready(&mut self) -> Poll<(), S::Error>
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fn call(&mut self, request: Self::Request) -> S::Future
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impl<S: ?Sized> Service for Box<S> where
S: Service,
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S: Service,
type Request = S::Request
type Response = S::Response
type Error = S::Error
type Future = S::Future
fn poll_ready(&mut self) -> Poll<(), S::Error>
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fn call(&mut self, request: Self::Request) -> S::Future
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impl<S> Service for Rc<RefCell<S>> where
S: Service,
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S: Service,
type Request = S::Request
type Response = S::Response
type Error = S::Error
type Future = S::Future
fn poll_ready(&mut self) -> Poll<(), S::Error>
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fn call(&mut self, request: Self::Request) -> S::Future
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Implementors
impl<A, B> Service for AndThen<A, B> where
A: Service,
B: Service<Request = A::Response, Error = A::Error>,
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A: Service,
B: Service<Request = A::Response, Error = A::Error>,
type Request = A::Request
type Response = B::Response
type Error = A::Error
type Future = AndThenFuture<A, B>
fn poll_ready(&mut self) -> Poll<(), Self::Error>
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fn call(&mut self, req: A::Request) -> Self::Future
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impl<A, B> Service for Then<A, B> where
A: Service,
B: Service<Request = Result<A::Response, A::Error>, Error = A::Error>,
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A: Service,
B: Service<Request = Result<A::Response, A::Error>, Error = A::Error>,
type Request = A::Request
type Response = B::Response
type Error = B::Error
type Future = ThenFuture<A, B>
fn poll_ready(&mut self) -> Poll<(), Self::Error>
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fn call(&mut self, req: A::Request) -> Self::Future
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impl<A, E> Service for FromErr<A, E> where
A: Service,
E: From<A::Error>,
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A: Service,
E: From<A::Error>,
type Request = A::Request
type Response = A::Response
type Error = E
type Future = FromErrFuture<A, E>
fn poll_ready(&mut self) -> Poll<(), E>
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fn call(&mut self, req: A::Request) -> Self::Future
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impl<A, F, E> Service for MapErr<A, F, E> where
A: Service,
F: Fn(A::Error) -> E + Clone,
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A: Service,
F: Fn(A::Error) -> E + Clone,
type Request = A::Request
type Response = A::Response
type Error = E
type Future = MapErrFuture<A, F, E>
fn poll_ready(&mut self) -> Poll<(), Self::Error>
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fn call(&mut self, req: A::Request) -> Self::Future
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impl<A, F, Response> Service for Map<A, F, Response> where
A: Service,
F: FnMut(A::Response) -> Response + Clone,
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A: Service,
F: FnMut(A::Response) -> Response + Clone,
type Request = A::Request
type Response = Response
type Error = A::Error
type Future = MapFuture<A, F, Response>
fn poll_ready(&mut self) -> Poll<(), Self::Error>
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fn call(&mut self, req: A::Request) -> Self::Future
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impl<F, Req, Out> Service for ServiceFn<F, Req, Out> where
F: FnMut(Req) -> Out,
Out: IntoFuture,
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F: FnMut(Req) -> Out,
Out: IntoFuture,