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=str Remove outHandler of FlattenMerge (#29890)

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kerr 2020-12-15 18:18:48 +08:00 • committed by GitHub
parent 8bb74b592d
commit 8c0ffe3b2a
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1 changed files with 70 additions and 71 deletions
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19
akka-stream/src/main/scala/akka/stream/impl/fusing/StreamOfStreams.scala
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@ -39,7 +39,8 @@ import akka.util.ccompat.JavaConverters._
override def initialAttributes = DefaultAttributes.flattenMerge
override val shape = FlowShape(in, out)
override def createLogic(enclosingAttributes: Attributes) = new GraphStageLogic(shape) {
override def createLogic(enclosingAttributes: Attributes) =
new GraphStageLogic(shape) with OutHandler with InHandler {
var sources = Set.empty[SubSinkInlet[T]]
var pendingSingleSources = 0
def activeSources = sources.size + pendingSingleSources
@ -62,27 +63,25 @@ import akka.util.ccompat.JavaConverters._
}
}
setHandler(in, new InHandler {
override def onPush(): Unit = {
val source = grab(in)
addSource(source)
if (activeSources < breadth) tryPull(in)
}
override def onUpstreamFinish(): Unit = if (activeSources == 0) completeStage()
})
setHandler(out, new OutHandler {
override def onUpstreamFinish(): Unit = if (activeSources == 0) completeStage()
override def onPull(): Unit = {
pull(in)
setHandler(out, outHandler)
setHandler(out, new OutHandler {
override def onPull(): Unit = {
// could be unavailable due to async input having been executed before this notification
if (queue.nonEmpty && isAvailable(out)) pushOut()
}
})
val outHandler = new OutHandler {
// could be unavailable due to async input having been executed before this notification
override def onPull(): Unit = if (queue.nonEmpty && isAvailable(out)) pushOut()
}
setHandlers(in, out, this)
def addSource(source: Graph[SourceShape[T], M]): Unit = {
// If it's a SingleSource or wrapped such we can push the element directly instead of materializing it.
// Have to use AnyRef because of OptionVal null value.