ActorContext.getParent for Java API #22413

akka-docs/rst/java/code/jdocs/stream/MigrationsJava.java

@@ -0,0 +1,38 @@
+/**
+ * Copyright (C) 2015-2017 Lightbend Inc. <http://www.lightbend.com>
+ */
+package jdocs.stream;
+
+import java.util.stream.Stream;
+
+import akka.NotUsed;
+import akka.japi.Pair;
+import akka.stream.javadsl.*;
+//#asPublisher-import
+import static akka.stream.javadsl.AsPublisher.*;
+//#asPublisher-import
+
+public class MigrationsJava {
+
+  public static void main(String[] args) {
+    //#expand-continually
+    Flow.of(Integer.class).expand(in -> Stream.iterate(in, i -> i).iterator());
+    //#expand-continually
+    //#expand-state
+    Flow.of(Integer.class).expand(in ->
+        Stream.iterate(new Pair<>(in, 0),
+                       p -> new Pair<>(in, p.second() + 1)).iterator());
+    //#expand-state
+    
+    //#asPublisher
+    Sink.asPublisher(WITH_FANOUT);    // instead of Sink.asPublisher(true)
+    Sink.asPublisher(WITHOUT_FANOUT); // instead of Sink.asPublisher(false)
+    //#asPublisher
+
+    //#async
+    Flow<Integer, Integer, NotUsed> flow = Flow.of(Integer.class).map(n -> n + 1);
+    Source.range(1, 10).via(flow.async());
+    //#async
+  }
+
+}