opendaylight/md-sal/sal-clustering-commons/src/test/java/org/opendaylight/controller/cluster/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.cluster.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 static CommonConfig config;
  29     private final ReentrantLock lock = new ReentrantLock();
  30
  31     @Before
  32     public void setUp() throws Exception {
  33         config = new CommonConfig.Builder<>("testsystem").build();
  34         actorSystem = ActorSystem.create("testsystem", config.get());
  35     }
  36
  37     @After
  38     public void tearDown() throws Exception {
  39        if (actorSystem != null)
  40            actorSystem.shutdown();
  41     }
  42
  43     @Test
  44     public void shouldSendMsgToDeadLetterWhenQueueIsFull() throws InterruptedException {
  45         final JavaTestKit mockReceiver = new JavaTestKit(actorSystem);
  46         actorSystem.eventStream().subscribe(mockReceiver.getRef(), DeadLetter.class);
  47
  48
  49         final FiniteDuration TWENTY_SEC = new FiniteDuration(20, TimeUnit.SECONDS);
  50
  51         ActorRef pingPongActor = actorSystem.actorOf(PingPongActor.props(lock).withMailbox(config.getMailBoxName()),
  52                                                      "pingpongactor");
  53
  54         actorSystem.mailboxes().settings();
  55         lock.lock();
  56         //queue capacity = 10
  57         //need to send 12 messages; 1 message is dequeued and actor waits on lock,
  58         //2nd to 11th messages are put on the queue
  59         //12th message is sent to dead letter.
  60         for (int i=0;i<12;i++){
  61             pingPongActor.tell("ping", mockReceiver.getRef());
  62         }
  63
  64         mockReceiver.expectMsgClass(TWENTY_SEC, DeadLetter.class);
  65
  66         lock.unlock();
  67
  68         Object[] eleven = mockReceiver.receiveN(11, TWENTY_SEC);
  69     }
  70
  71     /**
  72      * For testing
  73      */
  74     public static class PingPongActor extends UntypedActor{
  75
  76         ReentrantLock lock;
  77
  78         private PingPongActor(ReentrantLock lock){
  79             this.lock = lock;
  80         }
  81
  82         public static Props props(final ReentrantLock lock){
  83             return Props.create(new Creator<PingPongActor>(){
  84                 private static final long serialVersionUID = 1L;
  85                 @Override
  86                 public PingPongActor create() throws Exception {
  87                     return new PingPongActor(lock);
  88                 }
  89             });
  90         }
  91
  92         @Override
  93         public void onReceive(Object message) throws Exception {
  94             lock.lock();
  95             try {
  96                 if ("ping".equals(message))
  97                     getSender().tell("pong", getSelf());
  98             } finally {
  99                 lock.unlock();
 100             }
 101         }
 102     }
 103 }