Struct futures_util::sink::Fanout

#[must_use = "sinks do nothing unless polled"]
pub struct Fanout<Si1, Si2> { /* 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<Si1, Si2> Fanout<Si1, Si2>

pub fn get_ref(&self) -> (&Si1, &Si2)

Get a shared reference to the inner sinks.

pub fn get_mut(&mut self) -> (&mut Si1, &mut Si2)

Get a mutable reference to the inner sinks.

pub fn get_pin_mut(self: Pin<&mut Self>) -> (Pin<&mut Si1>, Pin<&mut Si2>)

Get a pinned mutable reference to the inner sinks.

pub fn into_inner(self) -> (Si1, Si2)

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<Si1: Debug, Si2: Debug> Debug for Fanout<Si1, Si2>

fn fmt(&self, f: &mut Formatter) -> FmtResult

Formats the value using the given formatter.

impl<Si1, Si2, Item> Sink<Item> for Fanout<Si1, Si2> where
    Si1: Sink<Item>,
    Item: Clone,
    Si2: Sink<Item, Error = Si1::Error>, 

type Error = Si1::Error

The type of value produced by the sink when an error occurs.

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

Attempts to prepare the Sink to receive a value.

fn start_send(self: Pin<&mut Self>, item: Item) -> Result<(), Self::Error>

Begin the process of sending a value to the sink. Each call to this function must be preceded by a successful call to poll_ready which returned Poll::Ready(Ok(())).

fn poll_flush(
    self: Pin<&mut Self>,
    cx: &mut Context
) -> Poll<Result<(), Self::Error>>

Flush any remaining output from this sink.

fn poll_close(
    self: Pin<&mut Self>,
    cx: &mut Context
) -> Poll<Result<(), Self::Error>>

Flush any remaining output and close this sink, if necessary.