Struct futures::sink::Fanout
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pub struct Fanout<A: Sink, B: Sink> { /* fields omitted */ }
Sink that clones incoming items and forwards them to two sinks at the same time.
Backpressure from any downstream sink propagates up, which means that this sink can only process items as fast as its slowest downstream sink.
Methods
impl<A: Sink, B: Sink> Fanout<A, B>
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pub fn into_inner(self) -> (A, B)
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Consumes this combinator, returning the underlying sinks.
Note that this may discard intermediate state of this combinator, so care should be taken to avoid losing resources when this is called.
Trait Implementations
impl<A: Sink + Debug, B: Sink + Debug> Debug for Fanout<A, B> where
A::SinkItem: Debug,
B::SinkItem: Debug,
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A::SinkItem: Debug,
B::SinkItem: Debug,
fn fmt(&self, f: &mut Formatter) -> FmtResult
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Formats the value using the given formatter. Read more
impl<A, B> Sink for Fanout<A, B> where
A: Sink,
A::SinkItem: Clone,
B: Sink<SinkItem = A::SinkItem, SinkError = A::SinkError>,
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A: Sink,
A::SinkItem: Clone,
B: Sink<SinkItem = A::SinkItem, SinkError = A::SinkError>,
type SinkItem = A::SinkItem
The type of value that the sink accepts.
type SinkError = A::SinkError
The type of value produced by the sink when an error occurs.
fn start_send(
&mut self,
item: Self::SinkItem
) -> StartSend<Self::SinkItem, Self::SinkError>
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&mut self,
item: Self::SinkItem
) -> StartSend<Self::SinkItem, Self::SinkError>
Begin the process of sending a value to the sink. Read more
fn poll_complete(&mut self) -> Poll<(), Self::SinkError>
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Flush all output from this sink, if necessary. Read more
fn close(&mut self) -> Poll<(), Self::SinkError>
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A method to indicate that no more values will ever be pushed into this sink. Read more
fn wait(self) -> Wait<Self> where
Self: Sized,
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Self: Sized,
Creates a new object which will produce a synchronous sink. Read more
fn with<U, F, Fut>(self, f: F) -> With<Self, U, F, Fut> where
F: FnMut(U) -> Fut,
Fut: IntoFuture<Item = Self::SinkItem>,
Fut::Error: From<Self::SinkError>,
Self: Sized,
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F: FnMut(U) -> Fut,
Fut: IntoFuture<Item = Self::SinkItem>,
Fut::Error: From<Self::SinkError>,
Self: Sized,
Composes a function in front of the sink. Read more
fn with_flat_map<U, F, St>(self, f: F) -> WithFlatMap<Self, U, F, St> where
F: FnMut(U) -> St,
St: Stream<Item = Self::SinkItem, Error = Self::SinkError>,
Self: Sized,
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F: FnMut(U) -> St,
St: Stream<Item = Self::SinkItem, Error = Self::SinkError>,
Self: Sized,
Composes a function in front of the sink. Read more
fn sink_map_err<F, E>(self, f: F) -> SinkMapErr<Self, F> where
F: FnOnce(Self::SinkError) -> E,
Self: Sized,
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F: FnOnce(Self::SinkError) -> E,
Self: Sized,
Transforms the error returned by the sink.
fn sink_from_err<E: From<Self::SinkError>>(self) -> SinkFromErr<Self, E> where
Self: Sized,
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Self: Sized,
Map this sink's error to any error implementing From
for this sink's Error
, returning a new sink. Read more
fn buffer(self, amt: usize) -> Buffer<Self> where
Self: Sized,
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Self: Sized,
Adds a fixed-size buffer to the current sink. Read more
fn fanout<S>(self, other: S) -> Fanout<Self, S> where
Self: Sized,
Self::SinkItem: Clone,
S: Sink<SinkItem = Self::SinkItem, SinkError = Self::SinkError>,
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Self: Sized,
Self::SinkItem: Clone,
S: Sink<SinkItem = Self::SinkItem, SinkError = Self::SinkError>,
Fanout items to multiple sinks. Read more
fn flush(self) -> Flush<Self> where
Self: Sized,
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Self: Sized,
A future that completes when the sink has finished processing all pending requests. Read more
fn send(self, item: Self::SinkItem) -> Send<Self> where
Self: Sized,
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Self: Sized,
A future that completes after the given item has been fully processed into the sink, including flushing. Read more
fn send_all<S>(self, stream: S) -> SendAll<Self, S> where
S: Stream<Item = Self::SinkItem>,
Self::SinkError: From<S::Error>,
Self: Sized,
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S: Stream<Item = Self::SinkItem>,
Self::SinkError: From<S::Error>,
Self: Sized,
A future that completes after the given stream has been fully processed into the sink, including flushing. Read more