Struct flo_stream::SinglePublisher

pub struct SinglePublisher<Message> { /* private fields */ }

A single publisher is a publisher that sends each message to only a single subscriber rather than all of them

This is useful for scheduling messages on the first available worker.

Implementations

impl<Message> SinglePublisher<Message>

pub fn new(buffer_size: usize) -> SinglePublisher<Message>

Creates a new single publisher, which will buffer the specified number of messages

pub fn count_subscribers(&self) -> usize

Counts the number of subscribers in this publisher

pub fn republish(&self) -> Self

Creates a duplicate publisher that can be used to publish to the same streams as this object

Trait Implementations

impl<Message> Drop for SinglePublisher<Message>

fn drop(&mut self)

Executes the destructor for this type.

impl<Message> PublisherSink<Message> for SinglePublisher<Message>

fn subscribe(&mut self) -> Subscriber<Message>

Subscribes to this publisher

Subscribers only receive messages sent to the publisher after they are created.

impl<Message> Sink for SinglePublisher<Message>

type SinkItem = Message

The type of value that the sink accepts.

type SinkError = ()

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

fn start_send(&mut self, item: Message) -> StartSend<Message, ()>

Begin the process of sending a value to the sink.

fn poll_complete(&mut self) -> Poll<(), ()>

Flush all output from this sink, if necessary.

fn close(&mut self) -> Result<Async<()>, Self::SinkError>

A method to indicate that no more values will ever be pushed into this sink.

fn wait(self) -> Wait<Self>where
    Self: Sized,

Creates a new object which will produce a synchronous sink.

fn with<U, F, Fut>(self, f: F) -> With<Self, U, F, Fut>where
    F: FnMut(U) -> Fut,
    Fut: IntoFuture<Item = Self::SinkItem>,
    <Fut as IntoFuture>::Error: From<Self::SinkError>,
    Self: Sized,

Composes a function in front of the sink.

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,

Composes a function in front of the sink.

fn sink_map_err<F, E>(self, f: F) -> SinkMapErr<Self, F>where
    F: FnOnce(Self::SinkError) -> E,
    Self: Sized,

Transforms the error returned by the sink.

fn sink_from_err<E>(self) -> SinkFromErr<Self, E>where
    E: From<Self::SinkError>,
    Self: Sized,

Map this sink’s error to any error implementing From for this sink’s Error, returning a new sink.

fn buffer(self, amt: usize) -> Buffer<Self>where
    Self: Sized,

Adds a fixed-size buffer to the current sink.

fn flush(self) -> Flush<Self>where
    Self: Sized,

A future that completes when the sink has finished processing all pending requests.

fn send(self, item: Self::SinkItem) -> Send<Self>where
    Self: Sized,

A future that completes after the given item has been fully processed into the sink, including flushing.

fn send_all<S>(self, stream: S) -> SendAll<Self, S>where
    S: Stream<Item = Self::SinkItem>,
    Self::SinkError: From<<S as Stream>::Error>,
    Self: Sized,

A future that completes after the given stream has been fully processed into the sink, including flushing.