[−][src]Struct tower::util::Optional
Optionally forwards requests to an inner service.
If the inner service is None
, Error::None
is returned as the response.
Methods
impl<T> Optional<T>
[src]
pub fn new<Request>(inner: Option<T>) -> Optional<T> where
T: Service<Request>,
<T as Service<Request>>::Error: Into<Box<dyn Error + 'static + Send + Sync>>,
[src]
T: Service<Request>,
<T as Service<Request>>::Error: Into<Box<dyn Error + 'static + Send + Sync>>,
Create a new OptionService
Trait Implementations
impl<T, Request> Service<Request> for Optional<T> where
T: Service<Request>,
Box<dyn Error + 'static + Send + Sync>: From<<T as Service<Request>>::Error>,
[src]
T: Service<Request>,
Box<dyn Error + 'static + Send + Sync>: From<<T as Service<Request>>::Error>,
type Response = <T as Service<Request>>::Response
Responses given by the service.
type Error = Box<dyn Error + 'static + Send + Sync>
Errors produced by the service.
type Future = ResponseFuture<<T as Service<Request>>::Future>
The future response value.
fn poll_ready(
&mut self,
cx: &mut Context
) -> Poll<Result<(), <Optional<T> as Service<Request>>::Error>>
[src]
&mut self,
cx: &mut Context
) -> Poll<Result<(), <Optional<T> as Service<Request>>::Error>>
fn call(
&mut self,
request: Request
) -> <Optional<T> as Service<Request>>::Future
[src]
&mut self,
request: Request
) -> <Optional<T> as Service<Request>>::Future
Auto Trait Implementations
impl<T> Send for Optional<T> where
T: Send,
T: Send,
impl<T> Sync for Optional<T> where
T: Sync,
T: Sync,
impl<T> Unpin for Optional<T> where
T: Unpin,
T: Unpin,
impl<T> UnwindSafe for Optional<T> where
T: UnwindSafe,
T: UnwindSafe,
impl<T> RefUnwindSafe for Optional<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
Blanket Implementations
impl<T, Request> ServiceExt<Request> for T where
T: Service<Request> + ?Sized,
[src]
T: Service<Request> + ?Sized,
ⓘImportant traits for Ready<'a, T, Request>fn ready(&mut self) -> Ready<Self, Request> where
Self: Sized,
[src]
ⓘImportant traits for Ready<'a, T, Request>
Self: Sized,
ⓘImportant traits for Oneshot<S, Req>fn oneshot(self, req: Request) -> Oneshot<Self, Request> where
Self: Sized,
[src]
ⓘImportant traits for Oneshot<S, Req>
Self: Sized,
fn call_all<S>(self, reqs: S) -> CallAll<Self, S> where
Self: Sized,
Self::Error: Into<Box<dyn Error + Send + Sync>>,
S: Stream<Item = Request>,
[src]
Self: Sized,
Self::Error: Into<Box<dyn Error + Send + Sync>>,
S: Stream<Item = Request>,
impl<T> From<T> for T
[src]
impl<T, U> Into<U> for T where
U: From<T>,
[src]
U: From<T>,
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.
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.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
[src]
impl<T> Borrow<T> for T where
T: ?Sized,
[src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
[src]
impl<T> Any for T where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,