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ActiveMQ example source code file (ReliableReconnectTest.java)

This example ActiveMQ source code file (ReliableReconnectTest.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

atomicboolean, atomicinteger, connection, connection, exception, exception, idgenerator, message, message_count, message_count, messageconsumer, net, network, reliablereconnecttest, reliablereconnecttest, thread

The ActiveMQ ReliableReconnectTest.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.net.URI;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;

import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.store.PersistenceAdapter;
import org.apache.activemq.store.amq.AMQPersistenceAdapter;
import org.apache.activemq.test.TestSupport;
import org.apache.activemq.util.IdGenerator;

/**
 * 
 */
public class ReliableReconnectTest extends TestSupport {
    
    protected static final int MESSAGE_COUNT = 100;
    protected static final String DEFAULT_BROKER_URL = ActiveMQConnectionFactory.DEFAULT_BROKER_BIND_URL;
    private static final int RECEIVE_TIMEOUT = 10000;
    
    protected int deliveryMode = DeliveryMode.PERSISTENT;
    protected String consumerClientId;
    protected Destination destination;
    protected AtomicBoolean closeBroker = new AtomicBoolean(false);
    protected AtomicInteger messagesReceived = new AtomicInteger(0);
    protected BrokerService broker;
    protected int firstBatch = MESSAGE_COUNT / 10;
    private IdGenerator idGen = new IdGenerator();

    public ReliableReconnectTest() {
    }

    public ReliableReconnectTest(String n) {
        super(n);
    }

    protected void setUp() throws Exception {
        consumerClientId = idGen.generateId();
        super.setUp();
        topic = true;
        destination = createDestination(getClass().getName());
    }
    
    protected void tearDown() throws Exception {
        if (broker!=null) {
            broker.stop();
        }
    }

    public ActiveMQConnectionFactory getConnectionFactory() throws Exception {
        return new ActiveMQConnectionFactory();
    }

    protected void startBroker(boolean deleteOnStart) throws JMSException {
        try {
            broker = BrokerFactory.createBroker(new URI("broker://()/localhost"));
            broker.setUseShutdownHook(false);
            broker.setDeleteAllMessagesOnStartup(deleteOnStart);
           
            broker.setUseJmx(false);
            PersistenceAdapter adaptor = broker.getPersistenceAdapter();
            if (adaptor instanceof AMQPersistenceAdapter) {
                ((AMQPersistenceAdapter)adaptor).setDisableLocking(true);
            }
            broker.addConnector(DEFAULT_BROKER_URL);
            broker.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    protected Connection createConsumerConnection() throws Exception {
        Connection consumerConnection = getConnectionFactory().createConnection();
        consumerConnection.setClientID(consumerClientId);
        consumerConnection.start();
        return consumerConnection;
    }

    protected MessageConsumer createConsumer(Connection con) throws Exception {
        Session s = con.createSession(false, Session.AUTO_ACKNOWLEDGE);
        return s.createDurableSubscriber((Topic)destination, "TestFred");
    }

    protected void spawnConsumer() {
        Thread thread = new Thread(new Runnable() {
            public void run() {
                try {
                    Connection consumerConnection = createConsumerConnection();
                    MessageConsumer consumer = createConsumer(consumerConnection);
                    // consume some messages

                    for (int i = 0; i < firstBatch; i++) {
                        Message msg = consumer.receive(RECEIVE_TIMEOUT);
                        if (msg != null) {
                            // log.info("GOT: " + msg);
                            messagesReceived.incrementAndGet();
                        }
                    }
                    synchronized (closeBroker) {
                        closeBroker.set(true);
                        closeBroker.notify();
                    }
                    Thread.sleep(2000);
                    for (int i = firstBatch; i < MESSAGE_COUNT; i++) {
                        Message msg = consumer.receive(RECEIVE_TIMEOUT);
                        // log.info("GOT: " + msg);
                        if (msg != null) {
                            messagesReceived.incrementAndGet();
                        }
                    }
                    consumerConnection.close();
                    synchronized (messagesReceived) {
                        messagesReceived.notify();
                    }
                } catch (Throwable e) {
                    e.printStackTrace();
                }
            }
        });
        thread.start();
    }

    public void testReconnect() throws Exception {
        startBroker(true);
        // register an interest as a durable subscriber
        Connection consumerConnection = createConsumerConnection();
        createConsumer(consumerConnection);
        consumerConnection.close();
        // send some messages ...
        Connection connection = createConnection();
        connection.setClientID(idGen.generateId());
        connection.start();
        Session producerSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        MessageProducer producer = producerSession.createProducer(destination);
        TextMessage msg = producerSession.createTextMessage();
        for (int i = 0; i < MESSAGE_COUNT; i++) {
            msg.setText("msg: " + i);
            producer.send(msg);
        }
        connection.close();
        spawnConsumer();
        synchronized (closeBroker) {
            if (!closeBroker.get()) {
                closeBroker.wait();
            }
        }
        // System.err.println("Stopping broker");
        broker.stop();
        startBroker(false);
        // System.err.println("Started Broker again");
        synchronized (messagesReceived) {
            if (messagesReceived.get() < MESSAGE_COUNT) {
                messagesReceived.wait(60000);
            }
        }
        // assertTrue(messagesReceived.get() == MESSAGE_COUNT);
        int count = messagesReceived.get();
        assertTrue("Not enough messages received: " + count, count > firstBatch);
    }
}

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