95 lines
2.4 KiB
Scala
95 lines
2.4 KiB
Scala
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package docs.stream.cookbook
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import akka.stream.scaladsl._
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import akka.stream.testkit.StreamTestKit
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import akka.stream.testkit.StreamTestKit.{ SubscriberProbe, PublisherProbe }
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import scala.concurrent.duration._
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class RecipeManualTrigger extends RecipeSpec {
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"Recipe for triggering a stream manually" must {
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"work" in {
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val elements = Source(List("1", "2", "3", "4"))
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val pub = PublisherProbe[Trigger]()
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val sub = SubscriberProbe[Message]()
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val triggerSource = Source(pub)
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val sink = Sink(sub)
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//#manually-triggered-stream
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import FlowGraphImplicits._
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val graph = FlowGraph { implicit builder =>
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val zip = Zip[Message, Trigger]
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elements ~> zip.left
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triggerSource ~> zip.right
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zip.out ~> Flow[(Message, Trigger)].map { case (msg, trigger) => msg } ~> sink
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}
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//#manually-triggered-stream
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graph.run()
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val manualSource = new StreamTestKit.AutoPublisher(pub)
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sub.expectSubscription().request(1000)
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sub.expectNoMsg(100.millis)
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manualSource.sendNext(())
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sub.expectNext("1")
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sub.expectNoMsg(100.millis)
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manualSource.sendNext(())
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manualSource.sendNext(())
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sub.expectNext("2")
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sub.expectNext("3")
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sub.expectNoMsg(100.millis)
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manualSource.sendNext(())
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sub.expectNext("4")
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sub.expectComplete()
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}
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"work with ZipWith" in {
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val elements = Source(List("1", "2", "3", "4"))
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val pub = PublisherProbe[Trigger]()
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val sub = SubscriberProbe[Message]()
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val triggerSource = Source(pub)
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val sink = Sink(sub)
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//#manually-triggered-stream-zipwith
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import FlowGraphImplicits._
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val graph = FlowGraph { implicit builder =>
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val zip = ZipWith[Message, Trigger, Message](
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(msg: Message, trigger: Trigger) => msg)
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elements ~> zip.left
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triggerSource ~> zip.right
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zip.out ~> sink
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}
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//#manually-triggered-stream-zipwith
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graph.run()
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val manualSource = new StreamTestKit.AutoPublisher(pub)
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sub.expectSubscription().request(1000)
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sub.expectNoMsg(100.millis)
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manualSource.sendNext(())
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sub.expectNext("1")
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sub.expectNoMsg(100.millis)
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manualSource.sendNext(())
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manualSource.sendNext(())
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sub.expectNext("2")
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sub.expectNext("3")
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sub.expectNoMsg(100.millis)
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manualSource.sendNext(())
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sub.expectNext("4")
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sub.expectComplete()
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}
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}
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}
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