Struct Fallback 

pub struct Fallback<S1, S2, F = OnError>
where
    S2: Clone,
{ /* private fields */ }

Provides fallback processing on a second service if its fallback policy selects it.

Implementations

impl<S1, S2: Clone> Fallback<S1, S2, OnError>

pub fn new(svc1: S1, svc2: S2) -> Self

Creates a new Fallback wrapping a pair of services.

Requests are processed on svc1, and retried on svc2 if svc1 errored.

impl<S1, S2: Clone, F: Clone> Fallback<S1, S2, F>

pub fn new_with_policy(svc1: S1, svc2: S2, policy: F) -> Self

Creates a new Fallback wrapping a pair of services with a custom fallback policy.

Requests are processed on svc1, and retried on svc2 if policy returns true for svc1’s result.

Trait Implementations

impl<S1: Clone, S2: Clone, F: Clone> Clone for Fallback<S1, S2, F>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<S1: Debug, S2, F: Debug> Debug for Fallback<S1, S2, F>

where S2: Clone + Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<S1, S2, F, Request> Service<Request> for Fallback<S1, S2, F>

where S1: Service<Request>, S2: Service<Request, Response = <S1 as Service<Request>>::Response> + Clone, F: FallbackPolicy<<S1 as Service<Request>>::Response> + Clone, S1::Error: Into<BoxedError>, S2::Error: Into<BoxedError>, Request: Clone,

type Response = <S1 as Service<Request>>::Response

Responses given by the service.

type Error = Box<dyn Error + Sync + Send>

Errors produced by the service.

type Future = ResponseFuture<S1, S2, Request, F>

The future response value.

fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>

Returns Poll::Ready(Ok(())) when the service is able to process requests.

fn call(&mut self, request: Request) -> Self::Future

Process the request and return the response asynchronously.