raboof/pekko
1
0
Fork 0
Code Issues Pull requests Projects Releases 6 Packages Wiki Activity Actions 10

Replaced PushStage based Take with GraphStage #19834

Browse source 
Changes suggested by @viktorklang

Added take to binary compatibility exclude

Cleanup
This commit is contained in:
Tapio Rautonen 2016-02-28 23:14:29 +02:00
parent 65a9e0a0f9
commit 1bcc1310d2
6 changed files with 50 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

31
akka-stream/src/main/scala/akka/stream/impl/fusing/Ops.scala
View file

@ -124,19 +124,30 @@ private[akka] final case class Recover[T](pf: PartialFunction[Throwable, T]) ext
/**
* INTERNAL API
*/
private[akka] final case class Take[T](count: Long) extends PushPullStage[T, T] {
private var left: Long = count
private[akka] final case class Take[T](count: Long) extends SimpleLinearGraphStage[T] {
override def initialAttributes: Attributes = DefaultAttributes.take
override def onPush(elem: T, ctx: Context[T]): SyncDirective = {
left -= 1
if (left > 0) ctx.push(elem)
else if (left == 0) ctx.pushAndFinish(elem)
else ctx.finish() //Handle negative take counts
override def createLogic(inheritedAttributes: Attributes): GraphStageLogic = new GraphStageLogic(shape) with InHandler with OutHandler {
private var left: Long = count
override def onPush(): Unit = {
val leftBefore = left
if (leftBefore >= 1) {
left = leftBefore - 1
push(out, grab(in))
}
if (leftBefore <= 1) completeStage()
}
override def onPull(): Unit = {
if (left > 0) pull(in)
else completeStage()
}
setHandlers(in, out, this)
}
override def onPull(ctx: Context[T]): SyncDirective =
if (left <= 0) ctx.finish()
else ctx.pull()
override def toString: String = "Take"
}
/**