ActiveMQ example source code file (TopicProducerFlowControlTest.java)

This example ActiveMQ source code file (TopicProducerFlowControlTest.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, atomiclong, atomiclong, brokerservice, didn't, exception, exception, policyentry, policyentry, policymap, string, thread, thread, topicproducerflowcontroltest, util

The ActiveMQ TopicProducerFlowControlTest.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.usecases;

import java.util.Arrays;
import java.util.concurrent.atomic.AtomicLong;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;

import junit.framework.TestCase;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.util.Wait;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TopicProducerFlowControlTest extends TestCase implements MessageListener {
    private static final Logger LOG = LoggerFactory.getLogger(TopicProducerFlowControlTest.class);
    private static final String brokerName = "testBroker";
    private static final String brokerUrl = "vm://" + brokerName;
    private static final int destinationMemLimit = 2097152; // 2MB
    private static final AtomicLong produced = new AtomicLong();
    private static final AtomicLong consumed = new AtomicLong();
    private static final int numMessagesToSend = 50000;

    private BrokerService broker;

    protected void setUp() throws Exception {
        // Setup and start the broker
        broker = new BrokerService();
        broker.setBrokerName(brokerName);
        broker.setPersistent(false);
        broker.setSchedulerSupport(false);
        broker.setUseJmx(false);
        broker.setUseShutdownHook(false);
        broker.addConnector(brokerUrl);

        // Setup the destination policy
        PolicyMap pm = new PolicyMap();

        // Setup the topic destination policy
        PolicyEntry tpe = new PolicyEntry();
        tpe.setTopic(">");
        tpe.setMemoryLimit(destinationMemLimit);
        tpe.setProducerFlowControl(true);

        // Setup the topic destination policy
        PolicyEntry qpe = new PolicyEntry();
        qpe.setQueue(">");
        qpe.setMemoryLimit(destinationMemLimit);
        qpe.setProducerFlowControl(true);
        qpe.setQueuePrefetch(1);

        pm.setPolicyEntries(Arrays.asList(new PolicyEntry[]{tpe, qpe}));

        broker.setDestinationPolicy(pm);

        // Start the broker
        broker.start();
        broker.waitUntilStarted();
    }


    protected void tearDown() throws Exception {
        broker.stop();
        broker.waitUntilStopped();
    }

    public void testTopicProducerFlowControl() throws Exception {
        Destination destination = new ActiveMQTopic("test");

        // Create the connection factory
        ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(brokerUrl);
        connectionFactory.setAlwaysSyncSend(true);
        connectionFactory.setProducerWindowSize(1024);

        // Start the test destination listener
        Connection c = connectionFactory.createConnection();
        c.start();
        c.createSession(false, 1).createConsumer(destination).setMessageListener(new TopicProducerFlowControlTest());

        // Start producing the test messages
        final Session session = connectionFactory.createConnection().createSession(false, Session.AUTO_ACKNOWLEDGE);
        final MessageProducer producer = session.createProducer(destination);

        Thread producingThread = new Thread("Producing Thread") {
            public void run() {
                try {
                    for (long i = 0; i < numMessagesToSend; i++) {
                        producer.send(session.createTextMessage("test"));

                        long count = produced.incrementAndGet();
                        if (count % 100 == 0) {
                            LOG.info("Produced " + count + " messages");
                        }
                    }
                } catch (Throwable ex) {
                    ex.printStackTrace();
                } finally {
                    try {
                        producer.close();
                        session.close();
                    } catch (Exception e) {
                    }
                }
            }
        };

        producingThread.start();

        Wait.waitFor(new Wait.Condition() {
            public boolean isSatisified() throws Exception {
                return consumed.get() == numMessagesToSend;
            }
        }, 5 * 60 * 1000); // give it plenty of time before failing

        assertEquals("Didn't produce all messages", numMessagesToSend, produced.get());
        assertEquals("Didn't consume all messages", numMessagesToSend, consumed.get());

    }

    @Override
    public void onMessage(Message message) {
        try {
            Thread.sleep(1);
        } catch (InterruptedException e) {
        }

        long count = consumed.incrementAndGet();
        if (count % 100 == 0) {
            LOG.info("\tConsumed " + count + " messages");
        }
    }
}