ActiveMQ example source code file (JmsClientAckTest.java)

This example ActiveMQ source code file (JmsClientAckTest.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

connection, exception, hello, hello, jmsexception, message, message, messageconsumer, messageproducer, messageproducer, queue, session, session, testsupport

The ActiveMQ JmsClientAckTest.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.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;

/**
 * 
 */
public class JmsClientAckTest extends TestSupport {

    private Connection connection;

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

        // Consume the message...
        MessageConsumer consumer = session.createConsumer(queue);
        Message msg = consumer.receive(1000);
        assertNotNull(msg);
        msg.acknowledge();

        // Reset the session.
        session.close();
        session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);

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

        session.close();
    }

    /**
     * Tests if acknowledged messages are being consumed.
     *
     * @throws JMSException
     */
    public void testLastMessageAcked() throws JMSException {
        connection.start();
        Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
        Queue queue = session.createQueue(getQueueName());
        MessageProducer producer = session.createProducer(queue);
        producer.send(session.createTextMessage("Hello"));
        producer.send(session.createTextMessage("Hello2"));
        producer.send(session.createTextMessage("Hello3"));

        // Consume the message...
        MessageConsumer consumer = session.createConsumer(queue);
        Message msg = consumer.receive(1000);
        assertNotNull(msg);
        msg = consumer.receive(1000);
        assertNotNull(msg);        
        msg = consumer.receive(1000);
        assertNotNull(msg);
        msg.acknowledge();

        // Reset the session.
        session.close();
        session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);

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

        session.close();
    }
    
    /**
     * Tests if unacknowledged messages are being re-delivered when the consumer connects again.
     * 
     * @throws JMSException
     */
    public void testUnAckedMessageAreNotConsumedOnSessionClose() throws JMSException {
        connection.start();
        Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
        Queue queue = session.createQueue(getQueueName());
        MessageProducer producer = session.createProducer(queue);
        producer.send(session.createTextMessage("Hello"));

        // Consume the message...
        MessageConsumer consumer = session.createConsumer(queue);
        Message msg = consumer.receive(1000);
        assertNotNull(msg);        
        // Don't ack the message.
        
        // Reset the session.  This should cause the unacknowledged message to be re-delivered.
        session.close();
        session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
                
        // Attempt to Consume the message...
        consumer = session.createConsumer(queue);
        msg = consumer.receive(2000);
        assertNotNull(msg);        
        msg.acknowledge();
        
        session.close();
    }

    protected String getQueueName() {
        return getClass().getName() + "." + getName();
    }

}