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

2020-03-26 18:00:58 +01:00 · 2020-03-26 18:00:58 +01:00 · 37d87811b5
commit 37d87811b5
parent 5605f04cb7
3 changed files with 53 additions and 1 deletions
--- a/akka-docs/src/test/scala/docs/stream/operators/sourceorflow/Watch.scala
+++ b/akka-docs/src/test/scala/docs/stream/operators/sourceorflow/Watch.scala
@ -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
+  }
+
+}