ActiveMQ example source code file (JmsClientAckListenerTest.java)

This example ActiveMQ source code file (JmsClientAckListenerTest.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

exception, exception, hello, jmsclientacklistenertest, message, message, messageconsumer, messagelistener, messageproducer, messageproducer, queue, session, session, testsupport

The ActiveMQ JmsClientAckListenerTest.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.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;

/**
 * 
 */
public class JmsClientAckListenerTest extends TestSupport implements MessageListener {

    private Connection connection;
    private boolean dontAck;

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

    /**
     * @see junit.framework.TestCase#tearDown()
     */
    protected void tearDown() throws Exception {
        if (connection != null) {
            connection.close();
            connection = null;
        }
        super.tearDown();
    }

    /**
     * Tests if acknowleged messages are being consumed.
     * 
     * @throws javax.jms.JMSException
     */
    public void testAckedMessageAreConsumed() throws Exception {
        connection.start();
        Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
        Queue queue = session.createQueue("test");
        MessageProducer producer = session.createProducer(queue);
        producer.send(session.createTextMessage("Hello"));

        // Consume the message...
        MessageConsumer consumer = session.createConsumer(queue);
        consumer.setMessageListener(this);

        Thread.sleep(10000);

        // Reset the session.
        session.close();

        session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);

        // Attempt to Consume the message...
        consumer = session.createConsumer(queue);
        Message msg = consumer.receive(1000);
        assertNull(msg);

        session.close();
    }

    /**
     * Tests if unacknowleged messages are being redelivered when the consumer
     * connects again.
     * 
     * @throws javax.jms.JMSException
     */
    public void testUnAckedMessageAreNotConsumedOnSessionClose() throws Exception {
        connection.start();
        // don't aknowledge message on onMessage() call
        dontAck = true;
        Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
        Queue queue = session.createQueue("test");
        MessageProducer producer = session.createProducer(queue);
        producer.send(session.createTextMessage("Hello"));

        // Consume the message...
        MessageConsumer consumer = session.createConsumer(queue);
        consumer.setMessageListener(this);
        // Don't ack the message.

        // Reset the session. This should cause the Unacked message to be
        // redelivered.
        session.close();

        Thread.sleep(10000);
        session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
        // Attempt to Consume the message...
        consumer = session.createConsumer(queue);
        Message msg = consumer.receive(2000);
        assertNotNull(msg);
        msg.acknowledge();

        session.close();
    }

    public void onMessage(Message message) {

        assertNotNull(message);
        if (!dontAck) {
            try {
                message.acknowledge();
            } catch (Exception e) {
                e.printStackTrace();
            }

        }

    }
}