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.testkit.JavaTestKit;
  16 import org.junit.After;
  17 import org.junit.Before;
  18 import org.junit.Test;
  19 import scala.concurrent.duration.FiniteDuration;
  20
  21 import java.util.concurrent.TimeUnit;
  22 import java.util.concurrent.locks.ReentrantLock;
  23
  24 public class MeteredBoundedMailboxTest {
  25
  26     private static ActorSystem actorSystem;
  27     private static CommonConfig config;
  28     private final ReentrantLock lock = new ReentrantLock();
  29
  30     @Before
  31     public void setUp() throws Exception {
  32         config = new CommonConfig.Builder<>("testsystem").build();
  33         actorSystem = ActorSystem.create("testsystem", config.get());
  34     }
  35
  36     @After
  37     public void tearDown() throws Exception {
  38        if (actorSystem != null)
  39            actorSystem.shutdown();
  40     }
  41
  42     @Test
  43     public void shouldSendMsgToDeadLetterWhenQueueIsFull() throws InterruptedException {
  44         final JavaTestKit mockReceiver = new JavaTestKit(actorSystem);
  45         actorSystem.eventStream().subscribe(mockReceiver.getRef(), DeadLetter.class);
  46
  47
  48         final FiniteDuration TWENTY_SEC = new FiniteDuration(20, TimeUnit.SECONDS);
  49
  50         ActorRef pingPongActor = actorSystem.actorOf(PingPongActor.props(lock).withMailbox(config.getMailBoxName()),
  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(PingPongActor.class, lock);
  83         }
  84
  85         @Override
  86         public void onReceive(Object message) throws Exception {
  87             lock.lock();
  88             try {
  89                 if ("ping".equals(message))
  90                     getSender().tell("pong", getSelf());
  91             } finally {
  92                 lock.unlock();
  93             }
  94         }
  95     }
  96 }