Struct tower::balance::p2c::Balance[−][src]

pub struct Balance<D, Req> where
    D: Discover,
    D::Key: Hash,  { /* fields omitted */ }

Expand description

Efficiently distributes requests across an arbitrary number of services.

See the module-level documentation for details.

Note that Balance requires that the Discover you use is Unpin in order to implement Service. This is because it needs to be accessed from Service::poll_ready, which takes &mut self. You can achieve this easily by wrapping your Discover in Box::pin before you construct the Balance instance. For more details, see #319.

Struct tower::balance::p2c::Balance[−][src]

Implementations

impl<D, Req> Balance<D, Req> where D: Discover, D::Key: Hash, D::Service: Service<Req>, <D::Service as Service<Req>>::Error: Into<BoxError>,

pub fn new(discover: D) -> Self

pub fn from_rng<R: Rng>(discover: D, rng: R) -> Result<Self, Error>

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

Trait Implementations

impl<D: Discover, Req> Debug for Balance<D, Req> where D: Debug, D::Key: Hash + Debug, D::Service: Debug, Req: Debug,

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

impl<D, Req> Service<Req> for Balance<D, Req> where D: Discover + Unpin, D::Key: Hash + Clone, D::Error: Into<BoxError>, D::Service: Service<Req> + Load, <D::Service as Load>::Metric: Debug, <D::Service as Service<Req>>::Error: Into<BoxError>,

type Response = <D::Service as Service<Req>>::Response

type Error = BoxError

type Future = MapErr<<D::Service as Service<Req>>::Future, fn(_: <D::Service as Service<Req>>::Error) -> BoxError>

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

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

Auto Trait Implementations

impl<D, Req> !RefUnwindSafe for Balance<D, Req>

impl<D, Req> Send for Balance<D, Req> where D: Send, Req: Send, <D as Discover>::Key: Send, <D as Discover>::Service: Send,

impl<D, Req> Sync for Balance<D, Req> where D: Sync, Req: Sync, <D as Discover>::Key: Sync, <D as Discover>::Service: Sync,

impl<D, Req> Unpin for Balance<D, Req> where D: Unpin, Req: Unpin,

impl<D, Req> !UnwindSafe for Balance<D, Req>

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

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

pub fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

pub 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 T where U: From<T>,

pub fn into(self) -> U

impl<T, Request> ServiceExt<Request> for T where 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 + Clone,

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>>,

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

type Error = Infallible

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

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

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

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

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

pub 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<D, Req> Balance<D, Req> where
D: Discover,
D::Key: Hash,
D::Service: Service<Req>,
<D::Service as Service<Req>>::Error: Into<BoxError>,

impl<D: Discover, Req> Debug for Balance<D, Req> where
D: Debug,
D::Key: Hash + Debug,
D::Service: Debug,
Req: Debug,

impl<D, Req> Service<Req> for Balance<D, Req> where
D: Discover + Unpin,
D::Key: Hash + Clone,
D::Error: Into<BoxError>,
D::Service: Service<Req> + Load,
<D::Service as Load>::Metric: Debug,
<D::Service as Service<Req>>::Error: Into<BoxError>,

impl<D, Req> Send for Balance<D, Req> where
D: Send,
Req: Send,
<D as Discover>::Key: Send,
<D as Discover>::Service: Send,

impl<D, Req> Sync for Balance<D, Req> where
D: Sync,
Req: Sync,
<D as Discover>::Key: Sync,
<D as Discover>::Service: Sync,

impl<D, Req> Unpin for Balance<D, Req> where
D: Unpin,
Req: Unpin,

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

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

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

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

impl<T, Request> ServiceExt<Request> for T where
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 + Clone,

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>>,

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

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

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

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