DeliveryOrderTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.activemq.artemis.jms.tests;

import javax.jms.Connection;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import java.util.concurrent.CountDownLatch;

import org.apache.activemq.artemis.jms.tests.util.ProxyAssertSupport;
import org.junit.Assert;
import org.junit.Test;

import static java.util.concurrent.TimeUnit.MILLISECONDS;

public class DeliveryOrderTest extends JMSTestCase {

   @Test
   public void testOutOfOrder() throws Exception {
      Connection conn = createConnection();

      Session sess = conn.createSession(true, Session.SESSION_TRANSACTED);

      Session sess2 = conn.createSession(true, Session.SESSION_TRANSACTED);

      MessageProducer prod = sess.createProducer(queue1);

      MessageConsumer cons = sess2.createConsumer(queue1);

      CountDownLatch latch = new CountDownLatch(1);

      final int NUM_MESSAGES = 1000;

      MyListener listener = new MyListener(latch, sess2, NUM_MESSAGES);

      cons.setMessageListener(listener);

      conn.start();

      for (int i = 0; i < NUM_MESSAGES; i++) {
         TextMessage tm = sess.createTextMessage("message" + i);

         prod.send(tm);

         if (i % 10 == 0) {
            sess.commit();
         }
      }

      // need extra commit for cases in which the last message index is not a multiple of 10
      sess.commit();

      Assert.assertTrue(latch.await(20000, MILLISECONDS));

      if (listener.failed) {
         ProxyAssertSupport.fail("listener failed: " + listener.getError());
      }
   }

   class MyListener implements MessageListener {

      private int c;

      private final int num;

      private final CountDownLatch latch;

      private volatile boolean failed;

      private String error;

      private final Session sess;

      MyListener(final CountDownLatch latch, final Session sess, final int num) {
         this.latch = latch;
         this.num = num;
         this.sess = sess;
      }

      @Override
      public void onMessage(final Message msg) {
         // preserve the first error
         if (failed) {
            return;
         }

         try {
            TextMessage tm = (TextMessage) msg;

            if (!("message" + c).equals(tm.getText())) {
               // Failed
               failed = true;
               setError("Listener was supposed to get " + "message" + c + " but got " + tm.getText());
               latch.countDown();
            }

            c++;

            if (c % 500 == 0) {
               sess.commit();
            }

            if (c == num) {
               sess.commit();
               latch.countDown();
            }
         } catch (JMSException e) {
            e.printStackTrace();

            // Failed
            failed = true;
            setError("Listener got exception " + e.toString());
            latch.countDown();
         }
      }

      public synchronized String getError() {
         return error;
      }

      private synchronized void setError(final String s) {
         error = s;
      }
   }
}