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+str - Adds Sink.last and Sink.lastOption to mirror Sink.head and Sink.headOption

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* Renames BlackholeSubscriber to SinkholeSunbscriber
* Makes SinkholeSubscriber request Long.MaxValue
* SinkholeSink seems like the best name ever
This commit is contained in:
Viktor Klang 2015-11-18 00:09:04 +01:00
parent cb8d3c4609
commit 94fe1fb26d
13 changed files with 268 additions and 191 deletions
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21
akka-stream/src/main/scala/akka/stream/javadsl/Sink.scala
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@ -113,6 +113,27 @@ object Sink {
new Sink(scaladsl.Sink.headOption[In].mapMaterializedValue(
_.map(akka.japi.Option.fromScalaOption)(ExecutionContexts.sameThreadExecutionContext)))
/**
* A `Sink` that materializes into a `Future` of the last value received.
* If the stream completes before signaling at least a single element, the Future will be failed with a [[NoSuchElementException]].
* If the stream signals an error errors before signaling at least a single element, the Future will be failed with the streams exception.
*
* See also [[lastOption]].
*/
def last[In](): Sink[In, Future[In]] =
new Sink(scaladsl.Sink.last[In])
/**
* A `Sink` that materializes into a `Future` of the optional last value received.
* If the stream completes before signaling at least a single element, the value of the Future will be an empty [[akka.japi.Option]].
* If the stream signals an error errors before signaling at least a single element, the Future will be failed with the streams exception.
*
* See also [[head]].
*/
def lastOption[In](): Sink[In, Future[akka.japi.Option[In]]] =
new Sink(scaladsl.Sink.lastOption[In].mapMaterializedValue(
_.map(akka.japi.Option.fromScalaOption)(ExecutionContexts.sameThreadExecutionContext)))
/**
* Sends the elements of the stream to the given `ActorRef`.
* If the target actor terminates the stream will be canceled.