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ActiveMQ example source code file (ExclusiveConsumerTest.java)

This example ActiveMQ source code file (ExclusiveConsumerTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

activemqqueue, activemqqueue, connection, connection, exception, exclusiveconsumertest, interruptedexception, jmsexception, message, messageconsumer, messageconsumer, messageproducer, session, session

The ActiveMQ ExclusiveConsumerTest.java source code

/**
 * 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;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;

import junit.framework.Assert;
import junit.framework.TestCase;
import org.apache.activemq.command.ActiveMQQueue;

public class ExclusiveConsumerTest extends TestCase {

    private static final String VM_BROKER_URL = "vm://localhost?broker.persistent=false&broker.useJmx=true";

    public ExclusiveConsumerTest(String name) {
        super(name);
    }

    protected void setUp() throws Exception {
        super.setUp();
    }

    protected void tearDown() throws Exception {
        super.tearDown();
    }

    private Connection createConnection(final boolean start) throws JMSException {
        ConnectionFactory cf = new ActiveMQConnectionFactory(VM_BROKER_URL);
        Connection conn = cf.createConnection();
        if (start) {
            conn.start();
        }
        return conn;
    }

    public void testExclusiveConsumerSelectedCreatedFirst() throws JMSException, InterruptedException {
        Connection conn = createConnection(true);

        Session exclusiveSession = null;
        Session fallbackSession = null;
        Session senderSession = null;

        try {

            exclusiveSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

            ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE1?consumer.exclusive=true");
            MessageConsumer exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

            ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE1");
            MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

            ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE1");

            MessageProducer producer = senderSession.createProducer(senderQueue);

            Message msg = senderSession.createTextMessage("test");
            producer.send(msg);
            // TODO need two send a 2nd message - bug AMQ-1024
            // producer.send(msg);
            Thread.sleep(100);

            // Verify exclusive consumer receives the message.
            Assert.assertNotNull(exclusiveConsumer.receive(100));
            Assert.assertNull(fallbackConsumer.receive(100));

        } finally {
            fallbackSession.close();
            senderSession.close();
            conn.close();
        }

    }

    public void testExclusiveConsumerSelectedCreatedAfter() throws JMSException, InterruptedException {
        Connection conn = createConnection(true);

        Session exclusiveSession = null;
        Session fallbackSession = null;
        Session senderSession = null;

        try {

            exclusiveSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

            ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE5");
            MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

            ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE5?consumer.exclusive=true");
            MessageConsumer exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

            ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE5");

            MessageProducer producer = senderSession.createProducer(senderQueue);

            Message msg = senderSession.createTextMessage("test");
            producer.send(msg);
            Thread.sleep(100);

            // Verify exclusive consumer receives the message.
            Assert.assertNotNull(exclusiveConsumer.receive(100));
            Assert.assertNull(fallbackConsumer.receive(100));

        } finally {
            fallbackSession.close();
            senderSession.close();
            conn.close();
        }

    }

    public void testFailoverToAnotherExclusiveConsumerCreatedFirst() throws JMSException,
        InterruptedException {
        Connection conn = createConnection(true);

        Session exclusiveSession1 = null;
        Session exclusiveSession2 = null;
        Session fallbackSession = null;
        Session senderSession = null;

        try {

            exclusiveSession1 = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            exclusiveSession2 = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

            // This creates the exclusive consumer first which avoids AMQ-1024
            // bug.
            ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE2?consumer.exclusive=true");
            MessageConsumer exclusiveConsumer1 = exclusiveSession1.createConsumer(exclusiveQueue);
            MessageConsumer exclusiveConsumer2 = exclusiveSession2.createConsumer(exclusiveQueue);

            ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE2");
            MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

            ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE2");

            MessageProducer producer = senderSession.createProducer(senderQueue);

            Message msg = senderSession.createTextMessage("test");
            producer.send(msg);
            Thread.sleep(100);

            // Verify exclusive consumer receives the message.
            Assert.assertNotNull(exclusiveConsumer1.receive(100));
            Assert.assertNull(exclusiveConsumer2.receive(100));
            Assert.assertNull(fallbackConsumer.receive(100));

            // Close the exclusive consumer to verify the non-exclusive consumer
            // takes over
            exclusiveConsumer1.close();

            producer.send(msg);
            producer.send(msg);

            Assert.assertNotNull(exclusiveConsumer2.receive(100));
            Assert.assertNull(fallbackConsumer.receive(100));

        } finally {
            fallbackSession.close();
            senderSession.close();
            conn.close();
        }

    }

    public void testFailoverToAnotherExclusiveConsumerCreatedAfter() throws JMSException,
        InterruptedException {
        Connection conn = createConnection(true);

        Session exclusiveSession1 = null;
        Session exclusiveSession2 = null;
        Session fallbackSession = null;
        Session senderSession = null;

        try {

            exclusiveSession1 = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            exclusiveSession2 = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

            // This creates the exclusive consumer first which avoids AMQ-1024
            // bug.
            ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE6?consumer.exclusive=true");
            MessageConsumer exclusiveConsumer1 = exclusiveSession1.createConsumer(exclusiveQueue);

            ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE6");
            MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

            MessageConsumer exclusiveConsumer2 = exclusiveSession2.createConsumer(exclusiveQueue);

            ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE6");

            MessageProducer producer = senderSession.createProducer(senderQueue);

            Message msg = senderSession.createTextMessage("test");
            producer.send(msg);
            Thread.sleep(100);

            // Verify exclusive consumer receives the message.
            Assert.assertNotNull(exclusiveConsumer1.receive(100));
            Assert.assertNull(exclusiveConsumer2.receive(100));
            Assert.assertNull(fallbackConsumer.receive(100));

            // Close the exclusive consumer to verify the non-exclusive consumer
            // takes over
            exclusiveConsumer1.close();

            producer.send(msg);
            producer.send(msg);

            Assert.assertNotNull(exclusiveConsumer2.receive(1000));
            Assert.assertNull(fallbackConsumer.receive(100));

        } finally {
            fallbackSession.close();
            senderSession.close();
            conn.close();
        }

    }

    public void testFailoverToNonExclusiveConsumer() throws JMSException, InterruptedException {
        Connection conn = createConnection(true);

        Session exclusiveSession = null;
        Session fallbackSession = null;
        Session senderSession = null;

        try {

            exclusiveSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

            // This creates the exclusive consumer first which avoids AMQ-1024
            // bug.
            ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE3?consumer.exclusive=true");
            MessageConsumer exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

            ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE3");
            MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

            ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE3");

            MessageProducer producer = senderSession.createProducer(senderQueue);

            Message msg = senderSession.createTextMessage("test");
            producer.send(msg);
            Thread.sleep(100);

            // Verify exclusive consumer receives the message.
            Assert.assertNotNull(exclusiveConsumer.receive(100));
            Assert.assertNull(fallbackConsumer.receive(100));

            // Close the exclusive consumer to verify the non-exclusive consumer
            // takes over
            exclusiveConsumer.close();

            producer.send(msg);

            Assert.assertNotNull(fallbackConsumer.receive(100));

        } finally {
            fallbackSession.close();
            senderSession.close();
            conn.close();
        }

    }

    public void testFallbackToExclusiveConsumer() throws JMSException, InterruptedException {
        Connection conn = createConnection(true);

        Session exclusiveSession = null;
        Session fallbackSession = null;
        Session senderSession = null;

        try {

            exclusiveSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
            senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

            // This creates the exclusive consumer first which avoids AMQ-1024
            // bug.
            ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE4?consumer.exclusive=true");
            MessageConsumer exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

            ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE4");
            MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

            ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE4");

            MessageProducer producer = senderSession.createProducer(senderQueue);

            Message msg = senderSession.createTextMessage("test");
            producer.send(msg);
            Thread.sleep(100);

            // Verify exclusive consumer receives the message.
            Assert.assertNotNull(exclusiveConsumer.receive(100));
            Assert.assertNull(fallbackConsumer.receive(100));

            // Close the exclusive consumer to verify the non-exclusive consumer
            // takes over
            exclusiveConsumer.close();

            producer.send(msg);

            // Verify other non-exclusive consumer receices the message.
            Assert.assertNotNull(fallbackConsumer.receive(100));

            // Create exclusive consumer to determine if it will start receiving
            // the messages.
            exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

            producer.send(msg);
            Assert.assertNotNull(exclusiveConsumer.receive(100));
            Assert.assertNull(fallbackConsumer.receive(100));

        } finally {
            fallbackSession.close();
            senderSession.close();
            conn.close();
        }

    }
}

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