Struct tower::util::Optional [−][src]
This is supported on crate feature
util only.Optionally forwards requests to an inner service.
If the inner service is None, optional::None is returned as the response.
Implementations
impl<T> Optional<T>[src]
pub fn new<Request>(inner: Option<T>) -> Optional<T> where
T: Service<Request>,
T::Error: Into<BoxError>, [src]
T: Service<Request>,
T::Error: Into<BoxError>,
Create a new Optional.
Trait Implementations
impl<T: Debug> Debug for Optional<T>[src]
impl<T, Request> Service<Request> for Optional<T> where
T: Service<Request>,
T::Error: Into<BoxError>, [src]
T: Service<Request>,
T::Error: Into<BoxError>,
type Response = T::Response
Responses given by the service.
type Error = BoxError
Errors produced by the service.
type Future = ResponseFuture<T::Future>
The future response value.
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>[src]
fn call(&mut self, request: Request) -> Self::Future[src]
Auto Trait Implementations
impl<T> RefUnwindSafe for Optional<T> where
T: RefUnwindSafe, [src]
T: RefUnwindSafe,
impl<T> Send for Optional<T> where
T: Send, [src]
T: Send,
impl<T> Sync for Optional<T> where
T: Sync, [src]
T: Sync,
impl<T> Unpin for Optional<T> where
T: Unpin, [src]
T: Unpin,
impl<T> UnwindSafe for Optional<T> where
T: UnwindSafe, [src]
T: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T[src]
impl<T> From<T> for T[src]
impl<T> Instrument for T[src]
pub fn instrument(self, span: Span) -> Instrumented<Self>[src]
pub fn in_current_span(self) -> Instrumented<Self>[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T, Request> ServiceExt<Request> for T where
T: Service<Request> + ?Sized, [src]
T: Service<Request> + ?Sized,
fn ready_and(&mut self) -> ReadyAnd<'_, Self, Request>ⓘ where
Self: Sized, [src]
Self: Sized,
fn ready_oneshot(self) -> ReadyOneshot<Self, Request>ⓘNotable traits for ReadyOneshot<T, Request>
impl<T, Request> Future for ReadyOneshot<T, Request> where
T: Service<Request>, type Output = Result<T, T::Error>; where
Self: Sized, [src]
Notable traits for ReadyOneshot<T, Request>
impl<T, Request> Future for ReadyOneshot<T, Request> where
T: Service<Request>, type Output = Result<T, T::Error>;Self: Sized,
fn oneshot(self, req: Request) -> Oneshot<Self, Request>ⓘ where
Self: Sized, [src]
Self: Sized,
fn call_all<S>(self, reqs: S) -> CallAll<Self, S> where
Self: Sized,
Self::Error: Into<BoxError>,
S: Stream<Item = Request>, [src]
Self: Sized,
Self::Error: Into<BoxError>,
S: Stream<Item = Request>,
fn and_then<F>(self, f: F) -> AndThen<Self, F> where
Self: Sized,
F: Clone, [src]
Self: Sized,
F: Clone,
fn map_response<F, Response>(self, f: F) -> MapResponse<Self, F> where
Self: Sized,
F: FnOnce(Self::Response) -> Response + Clone, [src]
Self: Sized,
F: FnOnce(Self::Response) -> Response + Clone,
fn map_err<F, Error>(self, f: F) -> MapErr<Self, F> where
Self: Sized,
F: FnOnce(Self::Error) -> Error + Clone, [src]
Self: Sized,
F: FnOnce(Self::Error) -> Error + Clone,
fn map_result<F, Response, Error>(self, f: F) -> MapResult<Self, F> where
Self: Sized,
Error: From<Self::Error>,
F: FnOnce(Result<Self::Response, Self::Error>) -> Result<Response, Error> + Clone, [src]
Self: Sized,
Error: From<Self::Error>,
F: FnOnce(Result<Self::Response, Self::Error>) -> Result<Response, Error> + Clone,
fn map_request<F, NewRequest>(self, f: F) -> MapRequest<Self, F> where
Self: Sized,
F: FnMut(NewRequest) -> Request + Clone, [src]
Self: Sized,
F: FnMut(NewRequest) -> Request + Clone,
fn filter<F, NewRequest>(self, filter: F) -> Filter<Self, F> where
Self: Sized,
F: Predicate<NewRequest>, [src]
Self: Sized,
F: Predicate<NewRequest>,
fn filter_async<F, NewRequest>(self, filter: F) -> AsyncFilter<Self, F> where
Self: Sized,
F: AsyncPredicate<NewRequest>, [src]
Self: Sized,
F: AsyncPredicate<NewRequest>,
fn then<F, Response, Error, Fut>(self, f: F) -> Then<Self, F> where
Self: Sized,
Error: From<Self::Error>,
F: FnOnce(Result<Self::Response, Self::Error>) -> Fut + Clone,
Fut: Future<Output = Result<Response, Error>>, [src]
Self: Sized,
Error: From<Self::Error>,
F: FnOnce(Result<Self::Response, Self::Error>) -> Fut + Clone,
Fut: Future<Output = Result<Response, Error>>,
fn map_future<F, Fut, Response, Error>(self, f: F) -> MapFuture<Self, F> where
Self: Sized,
F: FnMut(Self::Future) -> Fut,
Error: From<Self::Error>,
Fut: Future<Output = Result<Response, Error>>, [src]
Self: Sized,
F: FnMut(Self::Future) -> Fut,
Error: From<Self::Error>,
Fut: Future<Output = Result<Response, Error>>,
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,