opendaylight/md-sal/sal-clustering-commons/src/test/java/org/opendaylight/controller/common/actor/MeteredBoundedMailboxTest.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.common.actor;
   9
  10 import akka.actor.ActorRef;
  11 import akka.actor.ActorSystem;
  12 import akka.actor.DeadLetter;
  13 import akka.actor.Props;
  14 import akka.actor.UntypedActor;
  15 import akka.japi.Creator;
  16 import akka.testkit.JavaTestKit;
  17 import org.junit.After;
  18 import org.junit.Before;
  19 import org.junit.Test;
  20 import scala.concurrent.duration.FiniteDuration;
  21
  22 import java.util.concurrent.TimeUnit;
  23 import java.util.concurrent.locks.ReentrantLock;
  24
  25 public class MeteredBoundedMailboxTest {
  26
  27     private static ActorSystem actorSystem;
  28     private final ReentrantLock lock = new ReentrantLock();
  29
  30     @Before
  31     public void setUp() throws Exception {
  32         actorSystem = ActorSystem.create("testsystem");
  33     }
  34
  35     @After
  36     public void tearDown() throws Exception {
  37        if (actorSystem != null)
  38            actorSystem.shutdown();
  39     }
  40
  41     @Test
  42     public void test_WhenQueueIsFull_ShouldSendMsgToDeadLetter() throws InterruptedException {
  43         final JavaTestKit mockReceiver = new JavaTestKit(actorSystem);
  44         actorSystem.eventStream().subscribe(mockReceiver.getRef(), DeadLetter.class);
  45
  46
  47         final FiniteDuration TWENTY_SEC = new FiniteDuration(20, TimeUnit.SECONDS);
  48
  49         String boundedMailBox = actorSystem.name() + ".bounded-mailbox";
  50         ActorRef pingPongActor = actorSystem.actorOf(PingPongActor.props(lock).withMailbox(boundedMailBox),
  51                                                      "pingpongactor");
  52
  53         actorSystem.mailboxes().settings();
  54         lock.lock();
  55         //queue capacity = 10
  56         //need to send 12 messages; 1 message is dequeued and actor waits on lock,
  57         //2nd to 11th messages are put on the queue
  58         //12th message is sent to dead letter.
  59         for (int i=0;i<12;i++){
  60             pingPongActor.tell("ping", mockReceiver.getRef());
  61         }
  62
  63         mockReceiver.expectMsgClass(TWENTY_SEC, DeadLetter.class);
  64
  65         lock.unlock();
  66
  67         Object[] eleven = mockReceiver.receiveN(11, TWENTY_SEC);
  68     }
  69
  70     /**
  71      * For testing
  72      */
  73     public static class PingPongActor extends UntypedActor{
  74
  75         ReentrantLock lock;
  76
  77         private PingPongActor(ReentrantLock lock){
  78             this.lock = lock;
  79         }
  80
  81         public static Props props(final ReentrantLock lock){
  82             return Props.create(new Creator<PingPongActor>(){
  83                 @Override
  84                 public PingPongActor create() throws Exception {
  85                     return new PingPongActor(lock);
  86                 }
  87             });
  88         }
  89
  90         @Override
  91         public void onReceive(Object message) throws Exception {
  92             lock.lock();
  93             try {
  94                 if ("ping".equals(message))
  95                     getSender().tell("pong", getSelf());
  96             } finally {
  97                 lock.unlock();
  98             }
  99         }
 100     }
 101 }