Making it possible/mandatory to signal which ExecutionContext will actually execute something scheduled

akka-docs/java/code/docs/actor/SchedulerDocTestBase.java

@@ -46,7 +46,7 @@ public class SchedulerDocTestBase {
   public void scheduleOneOffTask() {
     //#schedule-one-off-message
     //Schedules to send the "foo"-message to the testActor after 50ms
-    system.scheduler().scheduleOnce(Duration.create(50, TimeUnit.MILLISECONDS), testActor, "foo");
+    system.scheduler().scheduleOnce(Duration.create(50, TimeUnit.MILLISECONDS), testActor, "foo", system.dispatcher());
     //#schedule-one-off-message
 
     //#schedule-one-off-thunk
@@ -56,7 +56,7 @@ public class SchedulerDocTestBase {
       public void run() {
         testActor.tell(System.currentTimeMillis());
       }
-    });
+    }, system.dispatcher());
     //#schedule-one-off-thunk
   }
 
@@ -80,7 +80,7 @@ public class SchedulerDocTestBase {
     //This will schedule to send the Tick-message
     //to the tickActor after 0ms repeating every 50ms
     Cancellable cancellable = system.scheduler().schedule(Duration.Zero(), Duration.create(50, TimeUnit.MILLISECONDS),
-        tickActor, "Tick");
+        tickActor, "Tick", system.dispatcher());
 
     //This cancels further Ticks to be sent
     cancellable.cancel();

akka-docs/java/code/docs/actor/japi/FaultHandlingDocSample.java

@@ -138,7 +138,9 @@ public class FaultHandlingDocSample {
       log.debug("received message {}", msg);
       if (msg.equals(Start) && progressListener == null) {
         progressListener = getSender();
-        getContext().system().scheduler().schedule(Duration.Zero(), Duration.parse("1 second"), getSelf(), Do);
+        getContext().system().scheduler().schedule(
+            Duration.Zero(), Duration.parse("1 second"), getSelf(), Do, getContext().dispatcher()
+        );
       } else if (msg.equals(Do)) {
         counterService.tell(new Increment(1), getSelf());
         counterService.tell(new Increment(1), getSelf());
@@ -296,7 +298,9 @@ public class FaultHandlingDocSample {
         // Tell the counter that there is no storage for the moment
         counter.tell(new UseStorage(null), getSelf());
         // Try to re-establish storage after while
-        getContext().system().scheduler().scheduleOnce(Duration.parse("10 seconds"), getSelf(), Reconnect);
+        getContext().system().scheduler().scheduleOnce(
+                Duration.parse("10 seconds"), getSelf(), Reconnect, getContext().dispatcher()
+        );
       } else if (msg.equals(Reconnect)) {
         // Re-establish storage after the scheduled delay
         initStorage();

akka-docs/java/code/docs/zeromq/ZeromqDocTestBase.java

@@ -187,7 +187,7 @@ public class ZeromqDocTestBase {
     @Override
     public void preStart() {
       getContext().system().scheduler()
-          .schedule(Duration.parse("1 second"), Duration.parse("1 second"), getSelf(), TICK);
+          .schedule(Duration.parse("1 second"), Duration.parse("1 second"), getSelf(), TICK, getContext().dispatcher());
     }
 
     @Override