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AdaptiveDiscovery

Struct AdaptiveDiscovery 

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pub struct AdaptiveDiscovery<D> { /* private fields */ }
Expand description

Maps a Tower discovery stream into freshly initialized adaptive endpoints.

The wrapper intentionally creates new controller state for every insert. This is the safe behavior when discovery removes and later reuses an endpoint key; state retention can be added without changing the discovery contract once churn behavior is better understood.

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impl<D> AdaptiveDiscovery<D>

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pub fn new(inner: D, config: EndpointConfig) -> Self

Wraps a discovery stream and clones config into every inserted service.

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pub fn into_inner(self) -> D

Consumes the wrapper and returns the original discovery stream.

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impl<D, K, S> Stream for AdaptiveDiscovery<D>
where D: TryStream<Ok = Change<K, S>>,

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type Item = Result<Change<K, AdaptiveEndpoint<S>>, <D as TryStream>::Error>

Values yielded by the stream.
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fn poll_next( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Option<Self::Item>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted. Read more
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fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream. Read more
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impl<'__pin, D> Unpin for AdaptiveDiscovery<D>
where PinnedFieldsOf<__Origin<'__pin, D>>: Unpin,

Auto Trait Implementations§

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impl<D> Freeze for AdaptiveDiscovery<D>
where D: Freeze,

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impl<D> RefUnwindSafe for AdaptiveDiscovery<D>
where D: RefUnwindSafe,

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impl<D> Send for AdaptiveDiscovery<D>
where D: Send,

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impl<D> Sync for AdaptiveDiscovery<D>
where D: Sync,

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impl<D> UnsafeUnpin for AdaptiveDiscovery<D>
where D: UnsafeUnpin,

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impl<D> UnwindSafe for AdaptiveDiscovery<D>
where D: UnwindSafe,

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<K, S, E, D> Discover for D
where D: TryStream<Ok = Change<K, S>, Error = E> + ?Sized, K: Eq,

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type Key = K

A unique identifier for each active service. Read more
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type Service = S

The type of Service yielded by this Discover.
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type Error = E

Error produced during discovery
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fn poll_discover( self: Pin<&mut D>, cx: &mut Context<'_>, ) -> Poll<Option<Result<<D as TryStream>::Ok, <D as TryStream>::Error>>>

Yields the next discovery change set.
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impl<T> From<T> for T

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

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

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<S, T, E> TryStream for S
where S: Stream<Item = Result<T, E>> + ?Sized,

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type Ok = T

The type of successful values yielded by this future
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type Error = E

The type of failures yielded by this future
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fn try_poll_next( self: Pin<&mut S>, cx: &mut Context<'_>, ) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>

Poll this TryStream as if it were a Stream. Read more
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impl<T> WithSubscriber for T

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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