Add source.completionStage example #25468 (#28338)

2020-01-15 15:04:15 +01:00 · 2020-01-15 15:04:15 +01:00 · 087ed4b5a5
commit 087ed4b5a5
parent a8086e86e5
3 changed files with 42 additions and 1 deletions
--- a/akka-docs/src/test/java/jdocs/stream/operators/source/FromCompletionStage.java
+++ b/akka-docs/src/test/java/jdocs/stream/operators/source/FromCompletionStage.java
@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2018-2020 Lightbend Inc. <https://www.lightbend.com>
+ */
+
+package jdocs.stream.operators.source;
+
+// #sourceFromCompletionStage
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.CompletableFuture;
+
+import akka.NotUsed;
+import akka.Done;
+import akka.actor.typed.ActorSystem;
+import akka.stream.javadsl.*;
+
+// #sourceFromCompletionStage
+
+class FromCompletionStage {
+
+  public static void sourceFromCompletionStage() {
+    // Use one ActorSystem per application
+    ActorSystem system = null;
+
+    // #sourceFromCompletionStage
+    CompletionStage<Integer> stage = CompletableFuture.completedFuture(10);
+
+    Source<Integer, NotUsed> source = Source.completionStage(stage);
+
+    Sink<Integer, CompletionStage<Done>> sink = Sink.foreach(i -> System.out.println(i.toString()));
+
+    source.runWith(sink, system); // 10
+    // #sourceFromCompletionStage
+  }
+}