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Akka 27103/streams zip all #27103

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eyalfa 2019-07-05 17:40:06 +03:00 • committed by Johan Andrén
parent 98865d7fb6
commit 14c02302bc
11 changed files with 355 additions and 5 deletions
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32
akka-stream/src/main/scala/akka/stream/javadsl/Source.scala
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@ -19,6 +19,7 @@ import org.reactivestreams.{ Publisher, Subscriber }
import scala.annotation.unchecked.uncheckedVariance
import akka.util.ccompat.JavaConverters._
import scala.collection.immutable
import scala.concurrent.duration.FiniteDuration
import scala.concurrent.{ Future, Promise }
@ -1153,6 +1154,37 @@ final class Source[Out, Mat](delegate: scaladsl.Source[Out, Mat]) extends Graph[
matF: function.Function2[Mat, M, M2]): javadsl.Source[Out @uncheckedVariance Pair T, M2] =
this.viaMat(Flow.create[Out].zipMat(that, Keep.right[NotUsed, M]), matF)
/**
* Combine the elements of current flow and the given [[Source]] into a stream of tuples.
*
* '''Emits when''' at first emits when both inputs emit, and then as long as any input emits (coupled to the default value of the completed input).
*
* '''Backpressures when''' downstream backpressures
*
* '''Completes when''' all upstream completes
*
* '''Cancels when''' downstream cancels
*/
def zipAll[U, A >: Out](that: Graph[SourceShape[U], _], thisElem: A, thatElem: U): Source[Pair[A, U], Mat] =
new Source(delegate.zipAll(that, thisElem, thatElem).map { case (a, u) => Pair.create(a, u) })
/**
* Combine the elements of current flow and the given [[Source]] into a stream of tuples.
*
* @see [[#zipAll]]
*
* '''Emits when''' at first emits when both inputs emit, and then as long as any input emits (coupled to the default value of the completed input).
*
* '''Backpressures when''' downstream backpressures
*
* '''Completes when''' all upstream completes
*
* '''Cancels when''' downstream cancels
*/
def zipAllMat[U, Mat2, Mat3, A >: Out](that: Graph[SourceShape[U], Mat2], thisElem: A, thatElem: U)(
matF: (Mat, Mat2) => Mat3): Source[Pair[A, U], Mat3] =
new Source(delegate.zipAllMat(that, thisElem, thatElem)(matF).map { case (a, u) => Pair.create(a, u) })
/**
* Combine the elements of 2 streams into a stream of tuples, picking always the latest element of each.
*