ActiveMQ example source code file (JmsQueueTransactionTest.java)

This example ActiveMQ source code file (JmsQueueTransactionTest.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

arraylist, exception, exception, first, jmsresourceprovider, jmsresourceprovider, message, message, second, sent, session, should, should, test, util

The ActiveMQ JmsQueueTransactionTest.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 java.util.ArrayList;
import java.util.Enumeration;

import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.QueueBrowser;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.test.JmsResourceProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 */
public class JmsQueueTransactionTest extends JmsTransactionTestSupport {
    private static final Logger LOG = LoggerFactory.getLogger(JmsQueueTransactionTest.class);

    /**
     * @see org.apache.activemq.JmsTransactionTestSupport#getJmsResourceProvider()
     */
    protected JmsResourceProvider getJmsResourceProvider() {
        JmsResourceProvider p = new JmsResourceProvider();
        p.setTopic(false);
        return p;
    }

    /**
     * Tests if the the connection gets reset, the messages will still be
     * received.
     * 
     * @throws Exception
     */
    public void testReceiveTwoThenCloseConnection() throws Exception {
        Message[] outbound = new Message[] {session.createTextMessage("First Message"), session.createTextMessage("Second Message")};

        // lets consume any outstanding messages from previous test runs
        beginTx();
        while (consumer.receive(1000) != null) {
        }
        commitTx();

        beginTx();
        producer.send(outbound[0]);
        producer.send(outbound[1]);
        commitTx();

        LOG.info("Sent 0: " + outbound[0]);
        LOG.info("Sent 1: " + outbound[1]);

        ArrayList<Message> messages = new ArrayList();
        beginTx();
        Message message = consumer.receive(2000);
        assertEquals(outbound[0], message);

        message = consumer.receive(2000);
        assertNotNull(message);
        assertEquals(outbound[1], message);

        // Close and reopen connection.
        reconnect();

        // Consume again.. the previous message should
        // get redelivered.
        beginTx();
        message = consumer.receive(2000);
        assertNotNull("Should have re-received the first message again!", message);
        messages.add(message);
        assertEquals(outbound[0], message);

        message = consumer.receive(5000);
        assertNotNull("Should have re-received the second message again!", message);
        messages.add(message);
        assertEquals(outbound[1], message);
        commitTx();

        Message inbound[] = new Message[messages.size()];
        messages.toArray(inbound);

        assertTextMessagesEqual("Rollback did not work", outbound, inbound);
    }

    /**
     * Tests sending and receiving messages with two sessions(one for producing
     * and another for consuming).
     * 
     * @throws Exception
     */
    public void testSendReceiveInSeperateSessionTest() throws Exception {
        session.close();
        int batchCount = 10;

        for (int i = 0; i < batchCount; i++) {
            // Session that sends messages
            {
                Session session = resourceProvider.createSession(connection);
                this.session = session;
                MessageProducer producer = resourceProvider.createProducer(session, destination);
                // consumer = resourceProvider.createConsumer(session,
                // destination);
                beginTx();
                producer.send(session.createTextMessage("Test Message: " + i));
                commitTx();
                session.close();
            }

            // Session that consumes messages
            {
                Session session = resourceProvider.createSession(connection);
                this.session = session;
                MessageConsumer consumer = resourceProvider.createConsumer(session, destination);

                beginTx();
                TextMessage message = (TextMessage)consumer.receive(1000 * 5);
                assertNotNull("Received only " + i + " messages in batch ", message);
                assertEquals("Test Message: " + i, message.getText());

                commitTx();
                session.close();
            }
        }
    }

    /**
     * Tests the queue browser. Browses the messages then the consumer tries to
     * receive them. The messages should still be in the queue even when it was
     * browsed.
     * 
     * @throws Exception
     */
    public void testReceiveBrowseReceive() throws Exception {
        Message[] outbound = new Message[] {session.createTextMessage("First Message"), session.createTextMessage("Second Message"), session.createTextMessage("Third Message")};

        // lets consume any outstanding messages from previous test runs
        beginTx();
        while (consumer.receive(1000) != null) {
        }
        commitTx();

        beginTx();
        producer.send(outbound[0]);
        producer.send(outbound[1]);
        producer.send(outbound[2]);
        commitTx();

        // Get the first.
        beginTx();
        assertEquals(outbound[0], consumer.receive(1000));
        consumer.close();
        commitTx();
        
        beginTx();
        QueueBrowser browser = session.createBrowser((Queue)destination);
        Enumeration enumeration = browser.getEnumeration();

        // browse the second
        assertTrue("should have received the second message", enumeration.hasMoreElements());
        assertEquals(outbound[1], (Message)enumeration.nextElement());

        // browse the third.
        assertTrue("Should have received the third message", enumeration.hasMoreElements());
        assertEquals(outbound[2], (Message)enumeration.nextElement());

        // There should be no more.
        boolean tooMany = false;
        while (enumeration.hasMoreElements()) {
            LOG.info("Got extra message: " + ((TextMessage)enumeration.nextElement()).getText());
            tooMany = true;
        }
        assertFalse(tooMany);
        browser.close();

        // Re-open the consumer.
        consumer = resourceProvider.createConsumer(session, destination);
        // Receive the second.
        assertEquals(outbound[1], consumer.receive(1000));
        // Receive the third.
        assertEquals(outbound[2], consumer.receive(1000));
        consumer.close();

        commitTx();
    }

}