!per +act #17842 move BackoffSupervisor to akka.pattern

akka-docs/rst/java/code/docs/pattern/BackoffSupervisorDocTest.java

@@ -0,0 +1,32 @@
+/**
+ * Copyright (C) 2009-2015 Typesafe Inc. <http://www.typesafe.com>
+ */
+package docs.pattern;
+
+import akka.actor.*;
+import akka.pattern.BackoffSupervisor;
+import akka.testkit.TestActors.EchoActor;
+//#backoff-imports
+import scala.concurrent.duration.Duration;
+//#backoff-imports
+
+import java.util.concurrent.TimeUnit;
+
+public class BackoffSupervisorDocTest {
+
+  void example (ActorSystem system) {
+    //#backoff
+    final Props childProps = Props.create(EchoActor.class);
+
+    final Props  supervisorProps = BackoffSupervisor.props(
+      childProps,
+      "myEcho",
+      Duration.create(3, TimeUnit.SECONDS),
+      Duration.create(30, TimeUnit.SECONDS),
+      0.2); // adds 20% "noise" to vary the intervals slightly
+
+    system.actorOf(supervisorProps, "echoSupervisor");
+    //#backoff
+  }
+
+}