ActiveMQ example source code file (AMQ2171Test.java)

This example ActiveMQ source code file (AMQ2171Test.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

activemqconnectionfactory, brokerservice, connection, connection, enumeration, exception, exception, queue_size, session, string, string, test, test, threading, threads, throwable, util

The ActiveMQ AMQ2171Test.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.bugs;

import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;
import javax.jms.*;
import javax.jms.Queue;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.command.ActiveMQQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.*;

public class AMQ2171Test implements Thread.UncaughtExceptionHandler {

    private static final Logger LOG = LoggerFactory.getLogger(AMQ2171Test.class);
    private static final String BROKER_URL = "tcp://localhost:0";
    private static final int QUEUE_SIZE = 100;

    private static BrokerService brokerService;
    private static Queue destination;

    private String brokerUri;
    private String brokerUriNoPrefetch;
    private Collection<Throwable> exceptions = new CopyOnWriteArrayList();

    @Before
    public void setUp() throws Exception {
        // Start an embedded broker up.
        brokerService = new BrokerService();
        brokerService.setDeleteAllMessagesOnStartup(true);
        brokerService.addConnector(BROKER_URL);
        brokerService.start();

        brokerUri = brokerService.getTransportConnectors().get(0).getPublishableConnectString().toString();
        brokerUriNoPrefetch = brokerUri + "?jms.prefetchPolicy.all=0";

        destination = new ActiveMQQueue("Test");
        produce(brokerUri, QUEUE_SIZE);
    }

    @Before
    public void addHandler() {
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    @After
    public void tearDown() throws Exception {
        brokerService.stop();
    }

    @Test(timeout = 10000)
    public void testBrowsePrefetch() throws Exception {
        runTest(brokerUri);
    }

    @Test(timeout = 10000)
    public void testBrowseNoPrefetch() throws Exception {
        runTest(brokerUriNoPrefetch);
    }

    private void runTest(String brokerURL) throws Exception {

        Connection connection = new ActiveMQConnectionFactory(brokerURL).createConnection();

        try {
            connection.start();

            Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
            @SuppressWarnings("unchecked")
            Enumeration<Message> unread = (Enumeration) session.createBrowser(destination).getEnumeration();

            int count = 0;
            while (unread.hasMoreElements()) {
                unread.nextElement();
                count++;
            }

            assertEquals(QUEUE_SIZE, count);
            assertTrue(exceptions.isEmpty());
        } finally {
            try {
                connection.close();
            } catch (JMSException e) {
                exceptions.add(e);
            }
        }
    }

    private static void produce(String brokerURL, int count) throws Exception {
        Connection connection = null;

        try {

            ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(brokerURL);
            connection = factory.createConnection();
            Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
            MessageProducer producer = session.createProducer(destination);
            producer.setTimeToLive(0);
            connection.start();

            for (int i = 0; i < count; i++) {
                int id = i + 1;
                TextMessage message = session.createTextMessage("Message " + id);
                message.setIntProperty("MsgNumber", id);
                producer.send(message);

                if (id % 500 == 0) {
                    LOG.info("sent " + id + ", ith " + message);
                }
            }
        } finally {
            try {
                if (connection != null) {
                    connection.close();
                }
            } catch (Throwable e) {
            }
        }
    }

    public void uncaughtException(Thread t, Throwable e) {
        exceptions.add(e);
    }
}