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Doc example of Streams watch operator, #25468 (#28752)

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Patrik Nordwall 2020-03-26 18:00:58 +01:00 • committed by GitHub
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16
akka-docs/src/test/java/jdocs/stream/operators/SourceOrFlow.java
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@ -4,6 +4,7 @@
package jdocs.stream.operators;
import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.japi.pf.PFBuilder;
import akka.stream.javadsl.Flow;
@ -41,7 +42,6 @@ import akka.stream.Attributes;
// #log
import java.time.Duration;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.concurrent.CompletableFuture;
@ -426,4 +426,18 @@ class SourceOrFlow {
// -1
// #dropWhile
}
void watchExample() {
// #watch
final ActorRef ref = someActor();
Flow<String, String, NotUsed> flow =
Flow.of(String.class)
.watch(ref)
.recover(akka.stream.WatchedActorTerminatedException.class, () -> ref + " terminated");
// #watch
}
private ActorRef someActor() {
return null;
}
}

26
akka-docs/src/test/scala/docs/stream/operators/sourceorflow/Watch.scala Normal file
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@ -0,0 +1,26 @@
/*
* Copyright (C) 2019-2020 Lightbend Inc. <https://www.lightbend.com>
*/
package docs.stream.operators.sourceorflow
import akka.NotUsed
import akka.actor.ActorRef
import akka.stream.WatchedActorTerminatedException
import akka.stream.scaladsl.Flow
object Watch {
def someActor(): ActorRef = ???
def watchExample(): Unit = {
//#watch
val ref: ActorRef = someActor()
val flow: Flow[String, String, NotUsed] =
Flow[String].watch(ref).recover {
case _: WatchedActorTerminatedException => s"$ref terminated"
}
//#watch
}
}