Struct tower::balance::pool::Pool

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pub struct Pool<MS, Target, Request>where
    MS: MakeService<Target, Request>,
    MS::MakeError: Into<BoxError>,
    MS::Error: Into<BoxError>,
    Target: Clone,{ /* private fields */ }

Expand description

A dynamically sized, load-balanced pool of Service instances.

Implementations

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impl<MS, Target, Request> Pool<MS, Target, Request>where
 MS: MakeService<Target, Request>,
 MS::Service: Load,
 <MS::Service as Load>::Metric: Debug,
 MS::MakeError: Into<BoxError>,
 MS::Error: Into<BoxError>,
 Target: Clone,

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pub fn new(make_service: MS, target: Target) -> Self

Construct a new dynamically sized Pool.

If many calls to poll_ready return Pending, new_service is used to construct another Service that is then added to the load-balanced pool. If many calls to poll_ready succeed, the most recently added Service is dropped from the pool.

Trait Implementations

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impl<MS, Target, Request> Debug for Pool<MS, Target, Request>where
 MS: MakeService<Target, Request> + Debug,
 MS::MakeError: Into<BoxError>,
 MS::Error: Into<BoxError>,
 Target: Clone + Debug,
 MS::Service: Debug,

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

Formats the value using the given formatter. Read more

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impl<MS, Target, Req> Service<Req> for Pool<MS, Target, Req>where
 MS: MakeService<Target, Req>,
 MS::Service: Load,
 <MS::Service as Load>::Metric: Debug,
 MS::MakeError: Into<BoxError>,
 MS::Error: Into<BoxError>,
 Target: Clone,

type Response = <Balance<Pin<Box<PoolDiscoverer<MS, Target, Req>, Global>>, Req> as Service<Req>>::Response

Responses given by the service.

type Error = <Balance<Pin<Box<PoolDiscoverer<MS, Target, Req>, Global>>, Req> as Service<Req>>::Error

Errors produced by the service.

type Future = <Balance<Pin<Box<PoolDiscoverer<MS, Target, Req>, Global>>, Req> as Service<Req>>::Future

The future response value.

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

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

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fn call(&mut self, req: Req) -> Self::Future

Process the request and return the response asynchronously. Read more

Auto Trait Implementations

impl<MS, Target, Request> !RefUnwindSafe for Pool<MS, Target, Request>

impl<MS, Target, Request> Send for Pool<MS, Target, Request>where
 MS: Send,
 Request: Send,
 Target: Send,
 <MS as MakeService<Target, Request>>::Future: Send,
 <MS as MakeService<Target, Request>>::Service: Send,

impl<MS, Target, Request> Sync for Pool<MS, Target, Request>where
 MS: Sync,
 Request: Sync,
 Target: Sync,
 <MS as MakeService<Target, Request>>::Future: Sync,
 <MS as MakeService<Target, Request>>::Service: Sync,

impl<MS, Target, Request> Unpin for Pool<MS, Target, Request>where
Request: Unpin,

impl<MS, Target, Request> !UnwindSafe for Pool<MS, Target, Request>

Blanket Implementations

impl<T> Any for Twhere
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into for Twhere
U: From<T>,

const: unstable

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

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impl<T, Request> ServiceExt<Request> for Twhere
T: Service<Request> + ?Sized,

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fn ready(&mut self) -> Ready<'_, Self, Request>ⓘNotable traits for Ready<'a, T, Request>`impl<'a, T, Request> Future for Ready<'a, T, Request>where T: Service<Request>, type Output = Result<&'a mut T, T::Error>;`where
Self: Sized,

Yields a mutable reference to the service when it is ready to accept a request.

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fn ready_and(&mut self) -> ReadyAnd<'_, Self, Request>where
Self: Sized,

👎Deprecated since 0.4.6: please use the ServiceExt::ready method instead

Yields a mutable reference to the service when it is ready to accept a request.

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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,

Yields the service when it is ready to accept a request.

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fn oneshot(self, req: Request) -> Oneshot<Self, Request>ⓘNotable traits for Oneshot<S, Req>`impl<S, Req> Future for Oneshot<S, Req>where S: Service<Req>, type Output = Result<S::Response, S::Error>;`where
Self: Sized,

Consume this Service, calling with the providing request once it is ready.

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fn call_all<S>(self, reqs: S) -> CallAll<Self, S>where
 Self: Sized,
 Self::Error: Into<BoxError>,
 S: Stream<Item = Request>,

Process all requests from the given Stream, and produce a Stream of their responses. Read more

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fn and_then<F>(self, f: F) -> AndThen<Self, F>where
Self: Sized,
F: Clone,

Executes a new future after this service’s future resolves. This does not alter the behaviour of the poll_ready method. Read more

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fn map_response<F, Response>(self, f: F) -> MapResponse<Self, F>where
Self: Sized,
F: FnOnce(Self::Response) -> Response + Clone,

Maps this service’s response value to a different value. This does not alter the behaviour of the poll_ready method. Read more

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fn map_err<F, Error>(self, f: F) -> MapErr<Self, F>where
Self: Sized,
F: FnOnce(Self::Error) -> Error + Clone,

Maps this service’s error value to a different value. This does not alter the behaviour of the poll_ready method. Read more

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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,

Maps this service’s result type (Result<Self::Response, Self::Error>) to a different value, regardless of whether the future succeeds or fails. Read more

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fn map_request<F, NewRequest>(self, f: F) -> MapRequest<Self, F>where
Self: Sized,
F: FnMut(NewRequest) -> Request,

Composes a function in front of the service. Read more

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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>>,

Composes an asynchronous function after this service. Read more

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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>>,

Composes a function that transforms futures produced by the service. Read more

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fn boxed(self) -> BoxService<Request, Self::Response, Self::Error>where
Self: Sized + Send + 'static,
Self::Future: Send + 'static,

Convert the service into a Service + [Send] trait object. Read more

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fn boxed_clone(self) -> BoxCloneService<Request, Self::Response, Self::Error>where
Self: Clone + Sized + Send + 'static,
Self::Future: Send + 'static,

Convert the service into a Service + [Clone] + [Send] trait object. Read more

impl<T, U> TryFrom for Twhere
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

impl<T, U> TryInto for Twhere
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where
S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

Struct tower::balance::pool::Pool

Implementations

impl<MS, Target, Request> Pool<MS, Target, Request>where MS: MakeService<Target, Request>, MS::Service: Load, <MS::Service as Load>::Metric: Debug, MS::MakeError: Into<BoxError>, MS::Error: Into<BoxError>, Target: Clone,

pub fn new(make_service: MS, target: Target) -> Self

Trait Implementations

impl<MS, Target, Request> Debug for Pool<MS, Target, Request>where MS: MakeService<Target, Request> + Debug, MS::MakeError: Into<BoxError>, MS::Error: Into<BoxError>, Target: Clone + Debug, MS::Service: Debug,

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

impl<MS, Target, Req> Service<Req> for Pool<MS, Target, Req>where MS: MakeService<Target, Req>, MS::Service: Load, <MS::Service as Load>::Metric: Debug, MS::MakeError: Into<BoxError>, MS::Error: Into<BoxError>, Target: Clone,

type Response = <Balance<Pin<Box<PoolDiscoverer<MS, Target, Req>, Global>>, Req> as Service<Req>>::Response

type Error = <Balance<Pin<Box<PoolDiscoverer<MS, Target, Req>, Global>>, Req> as Service<Req>>::Error

type Future = <Balance<Pin<Box<PoolDiscoverer<MS, Target, Req>, Global>>, Req> as Service<Req>>::Future

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

fn call(&mut self, req: Req) -> Self::Future

Auto Trait Implementations

impl<MS, Target, Request> !RefUnwindSafe for Pool<MS, Target, Request>

impl<MS, Target, Request> Send for Pool<MS, Target, Request>where MS: Send, Request: Send, Target: Send, <MS as MakeService<Target, Request>>::Future: Send, <MS as MakeService<Target, Request>>::Service: Send,

impl<MS, Target, Request> Sync for Pool<MS, Target, Request>where MS: Sync, Request: Sync, Target: Sync, <MS as MakeService<Target, Request>>::Future: Sync, <MS as MakeService<Target, Request>>::Service: Sync,

impl<MS, Target, Request> Unpin for Pool<MS, Target, Request>where Request: Unpin,

impl<MS, Target, Request> !UnwindSafe for Pool<MS, Target, Request>

Blanket Implementations

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

fn in_current_span(self) -> Instrumented<Self>

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<T, Request> ServiceExt<Request> for Twhere T: Service<Request> + ?Sized,

fn ready(&mut self) -> Ready<'_, Self, Request>ⓘNotable traits for Ready<'a, T, Request>impl<'a, T, Request> Future for Ready<'a, T, Request>where T: Service<Request>, type Output = Result<&'a mut T, T::Error>;where Self: Sized,

fn ready_and(&mut self) -> ReadyAnd<'_, Self, Request>where 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,

fn oneshot(self, req: Request) -> Oneshot<Self, Request>ⓘNotable traits for Oneshot<S, Req>impl<S, Req> Future for Oneshot<S, Req>where S: Service<Req>, type Output = Result<S::Response, S::Error>;where Self: Sized,

fn call_all<S>(self, reqs: S) -> CallAll<Self, S>where 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,

fn map_response<F, Response>(self, f: F) -> MapResponse<Self, F>where 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,

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,

fn map_request<F, NewRequest>(self, f: F) -> MapRequest<Self, F>where Self: Sized, F: FnMut(NewRequest) -> Request,

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>>,

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>>,

fn boxed(self) -> BoxService<Request, Self::Response, Self::Error>where Self: Sized + Send + 'static, Self::Future: Send + 'static,

fn boxed_clone(self) -> BoxCloneService<Request, Self::Response, Self::Error>where Self: Clone + Sized + Send + 'static, Self::Future: Send + 'static,

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

fn with_current_subscriber(self) -> WithDispatch<Self>

impl<MS, Target, Request> Pool<MS, Target, Request>where
MS: MakeService<Target, Request>,
MS::Service: Load,
<MS::Service as Load>::Metric: Debug,
MS::MakeError: Into<BoxError>,
MS::Error: Into<BoxError>,
Target: Clone,

impl<MS, Target, Request> Debug for Pool<MS, Target, Request>where
MS: MakeService<Target, Request> + Debug,
MS::MakeError: Into<BoxError>,
MS::Error: Into<BoxError>,
Target: Clone + Debug,
MS::Service: Debug,

impl<MS, Target, Req> Service<Req> for Pool<MS, Target, Req>where
MS: MakeService<Target, Req>,
MS::Service: Load,
<MS::Service as Load>::Metric: Debug,
MS::MakeError: Into<BoxError>,
MS::Error: Into<BoxError>,
Target: Clone,

impl<MS, Target, Request> Send for Pool<MS, Target, Request>where
MS: Send,
Request: Send,
Target: Send,
<MS as MakeService<Target, Request>>::Future: Send,
<MS as MakeService<Target, Request>>::Service: Send,

impl<MS, Target, Request> Sync for Pool<MS, Target, Request>where
MS: Sync,
Request: Sync,
Target: Sync,
<MS as MakeService<Target, Request>>::Future: Sync,
<MS as MakeService<Target, Request>>::Service: Sync,

impl<MS, Target, Request> Unpin for Pool<MS, Target, Request>where
Request: Unpin,

impl<T> Any for Twhere
T: 'static + ?Sized,

impl<T> Borrow<T> for Twhere
T: ?Sized,

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

impl<T, U> Into<U> for Twhere
U: From<T>,

impl<T, Request> ServiceExt<Request> for Twhere
T: Service<Request> + ?Sized,

fn ready(&mut self) -> Ready<'_, Self, Request>ⓘNotable traits for Ready<'a, T, Request>`impl<'a, T, Request> Future for Ready<'a, T, Request>where T: Service<Request>, type Output = Result<&'a mut T, T::Error>;`where
Self: Sized,

fn ready_and(&mut self) -> ReadyAnd<'_, Self, Request>where
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,

fn oneshot(self, req: Request) -> Oneshot<Self, Request>ⓘNotable traits for Oneshot<S, Req>`impl<S, Req> Future for Oneshot<S, Req>where S: Service<Req>, type Output = Result<S::Response, S::Error>;`where
Self: Sized,

fn call_all<S>(self, reqs: S) -> CallAll<Self, S>where
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,

fn map_response<F, Response>(self, f: F) -> MapResponse<Self, F>where
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,

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,

fn map_request<F, NewRequest>(self, f: F) -> MapRequest<Self, F>where
Self: Sized,
F: FnMut(NewRequest) -> Request,

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>>,

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>>,

fn boxed(self) -> BoxService<Request, Self::Response, Self::Error>where
Self: Sized + Send + 'static,
Self::Future: Send + 'static,

fn boxed_clone(self) -> BoxCloneService<Request, Self::Response, Self::Error>where
Self: Clone + Sized + Send + 'static,
Self::Future: Send + 'static,

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,

impl<V, T> VZip<V> for Twhere
V: MultiLane<T>,

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where
S: Into<Dispatch>,