raboof/pekko
1
0
Fork 0
Code Issues Pull requests Projects Releases 6 Packages Wiki Activity Actions 11

#19444 simplify signature of FlowOps.expand

Browse source 
Any previous usage can be represented in this fashion while typically
saving one function allocation and also saving the function literal’s
syntax overhead (for the seed). Plus a new feature: the provided
iterator does not have to be infinite, limiting how far expand is
allowed to go.
This commit is contained in:
Roland Kuhn 2016-01-18 11:29:14 +01:00
parent a12451e007
commit 7463c50fc9
16 changed files with 127 additions and 151 deletions
Download patch file Download diff file Expand all files Collapse all files

10
akka-docs/rst/scala/code/docs/stream/RateTransformationDocSpec.scala
View file

@ -63,7 +63,7 @@ class RateTransformationDocSpec extends AkkaSpec {
"expand should repeat last" in {
//#expand-last
val lastFlow = Flow[Double]
.expand(identity)(s => (s, s))
.expand(Iterator.continually(_))
//#expand-last
val (probe, fut) = TestSource.probe[Double]
@ -81,15 +81,11 @@ class RateTransformationDocSpec extends AkkaSpec {
"expand should track drift" in {
//#expand-drift
val driftFlow = Flow[Double]
.expand((_, 0)) {
case (lastElement, drift) => ((lastElement, drift), (lastElement, drift + 1))
}
.expand(i => Iterator.from(0).map(i -> _))
//#expand-drift
val latch = TestLatch(2)
val realDriftFlow = Flow[Double]
.expand(d => { latch.countDown(); (d, 0) }) {
case (lastElement, drift) => ((lastElement, drift), (lastElement, drift + 1))
}
.expand(d => { latch.countDown(); Iterator.from(0).map(d -> _) })
val (pub, sub) = TestSource.probe[Double]
.via(realDriftFlow)