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ActiveMQ example source code file (JMSExclusiveConsumerTest.java)

This example ActiveMQ source code file (JMSExclusiveConsumerTest.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, exception, jmsexclusiveconsumertest, jmstestsupport, message, message, messageconsumer, messageconsumer, messageproducer, messageproducer, object, session, test

The ActiveMQ JMSExclusiveConsumerTest.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.DeliveryMode;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;

import junit.framework.Test;
import org.apache.activemq.command.ActiveMQQueue;

/**
 * Test cases used to test the JMS message exclusive consumers.
 * 
 * 
 */
public class JMSExclusiveConsumerTest extends JmsTestSupport {

    public int deliveryMode;

    public static Test suite() {
        return suite(JMSExclusiveConsumerTest.class);
    }

    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }

    public void initCombosForTestRoundRobinDispatchOnNonExclusive() {
        addCombinationValues("deliveryMode", new Object[] {Integer.valueOf(DeliveryMode.NON_PERSISTENT), Integer.valueOf(DeliveryMode.PERSISTENT)});
    }

    /**
     * Shows that by default messages are round robined across a set of
     * consumers.
     * 
     * @throws Exception
     */
    public void testRoundRobinDispatchOnNonExclusive() throws Exception {

        // Receive a message with the JMS API
        connection.start();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue("TEST");
        MessageProducer producer = session.createProducer(destination);
        producer.setDeliveryMode(deliveryMode);

        MessageConsumer consumer1 = session.createConsumer(destination);
        MessageConsumer consumer2 = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));

        Message m;
        m = consumer2.receive(1000);
        assertNotNull(m);

        m = consumer1.receive(1000);
        assertNotNull(m);

        assertNull(consumer1.receiveNoWait());
        assertNull(consumer2.receiveNoWait());
    }

    public void initCombosForTestDispatchExclusive() {
        addCombinationValues("deliveryMode", new Object[] {Integer.valueOf(DeliveryMode.NON_PERSISTENT), Integer.valueOf(DeliveryMode.PERSISTENT)});
    }

    /**
     * Shows that if the "?consumer.exclusive=true" option is added to
     * destination, then all messages are routed to 1 consumer.
     * 
     * @throws Exception
     */
    public void testDispatchExclusive() throws Exception {

        // Receive a message with the JMS API
        connection.start();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue("TEST?consumer.exclusive=true");
        MessageProducer producer = session.createProducer(destination);
        producer.setDeliveryMode(deliveryMode);

        MessageConsumer consumer1 = session.createConsumer(destination);
        MessageConsumer consumer2 = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        producer.send(session.createTextMessage("3nd"));

        Message m;
        m = consumer2.receive(1000);
        if (m != null) {
            // Consumer 2 should get all the messages.
            for (int i = 0; i < 2; i++) {
                m = consumer2.receive(1000);
                assertNotNull(m);
            }
        } else {
            // Consumer 1 should get all the messages.
            for (int i = 0; i < 3; i++) {
                m = consumer1.receive(1000);
                assertNotNull(m);
            }
        }

        assertNull(consumer1.receiveNoWait());
        assertNull(consumer2.receiveNoWait());
    }

    public void testMixExclusiveWithNonExclusive() throws Exception {
        ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.FOO?consumer.exclusive=true");
        ActiveMQQueue nonExclusiveQueue = new ActiveMQQueue("TEST.FOO?consumer.exclusive=false");

        connection.start();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

        MessageConsumer nonExCon = session.createConsumer(nonExclusiveQueue);
        MessageConsumer exCon = session.createConsumer(exclusiveQueue);

        MessageProducer prod = session.createProducer(exclusiveQueue);
        prod.send(session.createMessage());
        prod.send(session.createMessage());
        prod.send(session.createMessage());

        Message m;
        for (int i = 0; i < 3; i++) {
            m = exCon.receive(1000);
            assertNotNull(m);
            m = nonExCon.receive(1000);
            assertNull(m);
        }
    }
}

Other ActiveMQ examples (source code examples)

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