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 com.typesafe.config.Config;
  17 import com.typesafe.config.ConfigFactory;
  18 import java.util.concurrent.TimeUnit;
  19 import java.util.concurrent.locks.ReentrantLock;
  20 import org.junit.AfterClass;
  21 import org.junit.BeforeClass;
  22 import org.junit.Test;
  23 import scala.concurrent.duration.FiniteDuration;
  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     @BeforeClass
  32     public static void setUp() throws Exception {
  33         config = new CommonConfig.Builder<>("testsystem").withConfigReader(new AkkaConfigurationReader() {
  34             @Override
  35             public Config read() {
  36                 return ConfigFactory.load();
  37             }
  38         }).build();
  39         actorSystem = ActorSystem.create("testsystem", config.get());
  40     }
  41
  42     @AfterClass
  43     public static void tearDown() throws Exception {
  44         if (actorSystem != null) {
  45             actorSystem.terminate();
  46             actorSystem = null;
  47         }
  48     }
  49
  50     @Test
  51     public void shouldSendMsgToDeadLetterWhenQueueIsFull() throws InterruptedException {
  52         final JavaTestKit mockReceiver = new JavaTestKit(actorSystem);
  53         actorSystem.eventStream().subscribe(mockReceiver.getRef(), DeadLetter.class);
  54
  55
  56         final FiniteDuration TWENTY_SEC = new FiniteDuration(20, TimeUnit.SECONDS);
  57
  58         ActorRef pingPongActor = actorSystem.actorOf(PingPongActor.props(lock).withMailbox(config.getMailBoxName()),
  59                                                      "pingpongactor");
  60
  61         actorSystem.mailboxes().settings();
  62         lock.lock();
  63         //queue capacity = 10
  64         //need to send 12 messages; 1 message is dequeued and actor waits on lock,
  65         //2nd to 11th messages are put on the queue
  66         //12th message is sent to dead letter.
  67         for (int i=0;i<12;i++){
  68             pingPongActor.tell("ping", mockReceiver.getRef());
  69         }
  70
  71         mockReceiver.expectMsgClass(TWENTY_SEC, DeadLetter.class);
  72
  73         lock.unlock();
  74
  75         Object[] eleven = mockReceiver.receiveN(11, TWENTY_SEC);
  76     }
  77
  78     /**
  79      * For testing
  80      */
  81     public static class PingPongActor extends UntypedActor{
  82
  83         ReentrantLock lock;
  84
  85         private PingPongActor(final ReentrantLock lock){
  86             this.lock = lock;
  87         }
  88
  89         public static Props props(final ReentrantLock lock){
  90             return Props.create(PingPongActor.class, lock);
  91         }
  92
  93         @Override
  94         public void onReceive(final Object message) throws Exception {
  95             lock.lock();
  96             try {
  97                 if ("ping".equals(message)) {
  98                     getSender().tell("pong", getSelf());
  99                 }
 100             } finally {
 101                 lock.unlock();
 102             }
 103         }
 104     }
 105 }