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 TEN_SEC = new FiniteDuration(10, TimeUnit.SECONDS);
  48         String boundedMailBox = actorSystem.name() + ".bounded-mailbox";
  49         ActorRef pingPongActor = actorSystem.actorOf(PingPongActor.props(lock).withMailbox(boundedMailBox),
  50                                                      "pingpongactor");
  51
  52         actorSystem.mailboxes().settings();
  53         lock.lock();
  54         //queue capacity = 10
  55         //need to send 12 messages; 1 message is dequeued and actor waits on lock,
  56         //2nd to 11th messages are put on the queue
  57         //12th message is sent to dead letter.
  58         for (int i=0;i<12;i++){
  59             pingPongActor.tell("ping", mockReceiver.getRef());
  60         }
  61
  62         mockReceiver.expectMsgClass(TEN_SEC, DeadLetter.class);
  63
  64         lock.unlock();
  65
  66         Object[] eleven = mockReceiver.receiveN(11, TEN_SEC);
  67     }
  68
  69     /**
  70      * For testing
  71      */
  72     public static class PingPongActor extends UntypedActor{
  73
  74         ReentrantLock lock;
  75
  76         private PingPongActor(ReentrantLock lock){
  77             this.lock = lock;
  78         }
  79
  80         public static Props props(final ReentrantLock lock){
  81             return Props.create(new Creator<PingPongActor>(){
  82                 @Override
  83                 public PingPongActor create() throws Exception {
  84                     return new PingPongActor(lock);
  85                 }
  86             });
  87         }
  88
  89         @Override
  90         public void onReceive(Object message) throws Exception {
  91             lock.lock();
  92             if ("ping".equals(message))
  93                 getSender().tell("pong", getSelf());
  94         }
  95     }
  96 }