Struct Retry

pub struct Retry<P, S> { /* private fields */ }

Configure retrying requests of “failed” responses.

A Policy classifies what is a “failed” response.

Clone

This middleware requires that the inner Service implements Clone, because the Service must be stored in each ResponseFuture in order to retry the request in the event of a failure. If the inner Service type does not implement Clone, the Buffer middleware can be added to make any Service cloneable.

The Policy must also implement Clone. This middleware will clone the policy for each request session. This means a new clone of the policy will be created for each initial request and any subsequent retries of that request. Therefore, any state stored in the Policy instance is for that request session only. In order to share data across request sessions, that shared state may be stored in an Arc, so that all clones of the Policy type reference the same instance of the shared state.

Implementations

impl<P, S> Retry<P, S>

pub const fn new(policy: P, service: S) -> Self

Retry the inner service depending on this Policy.

pub fn get_ref(&self) -> &S

Get a reference to the inner service

pub fn get_mut(&mut self) -> &mut S

Get a mutable reference to the inner service

pub fn into_inner(self) -> S

Consume self, returning the inner service

Trait Implementations

impl<P: Clone, S: Clone> Clone for Retry<P, S>

fn clone(&self) -> Retry<P, S>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<P: Debug, S: Debug> Debug for Retry<P, S>

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

Formats the value using the given formatter.

impl<P, S, Request> Service<Request> for Retry<P, S>

where P: Policy<Request, S::Response, S::Error> + Clone, S: Service<Request> + Clone,

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

Responses given by the service.

type Error = <S as Service<Request>>::Error

Errors produced by the service.

type Future = ResponseFuture<P, S, Request>

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.

impl<'__pin, P, S> Unpin for Retry<P, S>

where PinnedFieldsOf<__Origin<'__pin, P, S>>: Unpin,