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

/**
 * Copyright (C) 2009-2012 Typesafe Inc. <http://www.typesafe.com>
 */
package docs.actor;

//#imports1
import akka.actor.Props;
import scala.concurrent.util.Duration;
import java.util.concurrent.TimeUnit;
//#imports1

//#imports2
import akka.actor.UntypedActor;
import akka.actor.UntypedActorFactory;
import akka.actor.Cancellable;
//#imports2

import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.testkit.AkkaSpec;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class SchedulerDocTestBase {

  ActorSystem system;
  ActorRef testActor;

  @Before
  public void setUp() {
    system = ActorSystem.create("MySystem", AkkaSpec.testConf());
    testActor = system.actorOf(new Props(MyUntypedActor.class));
  }

  @After
  public void tearDown() {
    system.shutdown();
  }

  @Test
  public void scheduleOneOffTask() {
    //#schedule-one-off-message
    system.scheduler().scheduleOnce(Duration.create(50, TimeUnit.MILLISECONDS),
      testActor, "foo", system.dispatcher());
    //#schedule-one-off-message

    //#schedule-one-off-thunk
    system.scheduler().scheduleOnce(Duration.create(50, TimeUnit.MILLISECONDS),
      new Runnable() {
        @Override
        public void run() {
          testActor.tell(System.currentTimeMillis(), null);
        }
    }, system.dispatcher());
    //#schedule-one-off-thunk
  }

  @Test
  public void scheduleRecurringTask() {
    //#schedule-recurring
    ActorRef tickActor = system.actorOf(new Props().withCreator(
      new UntypedActorFactory() {
        public UntypedActor create() {
          return new UntypedActor() {
            public void onReceive(Object message) {
              if (message.equals("Tick")) {
                // Do someting
              } else {
                unhandled(message);
              }
            }
          };
        }
      }));

    //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",
    system.dispatcher());

    //This cancels further Ticks to be sent
    cancellable.cancel();
    //#schedule-recurring
    system.stop(tickActor);
  }
}