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.ConfigFactory;
  17 import java.util.concurrent.TimeUnit;
  18 import java.util.concurrent.locks.ReentrantLock;
  19 import org.junit.AfterClass;
  20 import org.junit.BeforeClass;
  21 import org.junit.Test;
  22 import scala.concurrent.duration.FiniteDuration;
  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     @BeforeClass
  31     public static void setUp() throws Exception {
  32         config = new CommonConfig.Builder<>("testsystem").withConfigReader(() -> ConfigFactory.load()).build();
  33         actorSystem = ActorSystem.create("testsystem", config.get());
  34     }
  35
  36     @AfterClass
  37     public static void tearDown() throws Exception {
  38         if (actorSystem != null) {
  39             actorSystem.terminate();
  40             actorSystem = null;
  41         }
  42     }
  43
  44     @Test
  45     public void shouldSendMsgToDeadLetterWhenQueueIsFull() throws InterruptedException {
  46         final JavaTestKit mockReceiver = new JavaTestKit(actorSystem);
  47         actorSystem.eventStream().subscribe(mockReceiver.getRef(), DeadLetter.class);
  48
  49         final FiniteDuration twentySeconds = 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(twentySeconds, DeadLetter.class);
  65
  66         lock.unlock();
  67
  68         mockReceiver.receiveN(11, twentySeconds);
  69     }
  70
  71     /**
  72      * For testing.
  73      */
  74     public static class PingPongActor extends UntypedActor {
  75
  76         ReentrantLock lock;
  77
  78         private PingPongActor(final ReentrantLock lock) {
  79             this.lock = lock;
  80         }
  81
  82         public static Props props(final ReentrantLock lock) {
  83             return Props.create(PingPongActor.class, lock);
  84         }
  85
  86         @Override
  87         public void onReceive(final Object message) throws Exception {
  88             lock.lock();
  89             try {
  90                 if ("ping".equals(message)) {
  91                     getSender().tell("pong", getSelf());
  92                 }
  93             } finally {
  94                 lock.unlock();
  95             }
  96         }
  97     }
  98 }