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ActiveMQ example source code file (FailoverManagedClusterTest.java)

This example ActiveMQ source code file (FailoverManagedClusterTest.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

brokerservice, brokerservice, countdownlatch, countdownlatch, exception, exception, executioncontext, io, reflection, resourceexception, string, stubmessageendpoint, threading, threads, util, workexception, workexception, worklistener, xid

The ActiveMQ FailoverManagedClusterTest.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.ra;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.Timer;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import javax.jms.Connection;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.resource.ResourceException;
import javax.resource.spi.BootstrapContext;
import javax.resource.spi.UnavailableException;
import javax.resource.spi.XATerminator;
import javax.resource.spi.endpoint.MessageEndpoint;
import javax.resource.spi.endpoint.MessageEndpointFactory;
import javax.resource.spi.work.ExecutionContext;
import javax.resource.spi.work.Work;
import javax.resource.spi.work.WorkException;
import javax.resource.spi.work.WorkListener;
import javax.resource.spi.work.WorkManager;
import javax.transaction.xa.XAResource;
import javax.transaction.xa.Xid;

import junit.framework.TestCase;

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;

public class FailoverManagedClusterTest extends TestCase {
    private static final Logger LOG = LoggerFactory.getLogger(FailoverManagedClusterTest.class);
    
    long txGenerator = System.currentTimeMillis();
    
    private static final String MASTER_BIND_ADDRESS = "tcp://0.0.0.0:61616";
    private static final String SLAVE_BIND_ADDRESS = "tcp://0.0.0.0:61617";

    private static final String BROKER_URL = "failover://(" + MASTER_BIND_ADDRESS + "," + SLAVE_BIND_ADDRESS + ")?randomize=false";
    
    private BrokerService master;
    private BrokerService slave;
    private CountDownLatch slaveThreadStarted = new CountDownLatch(1);

    @Override
    protected void setUp() throws Exception {
        createAndStartMaster();
        createAndStartSlave();    
    }
    
    @Override
    protected void tearDown() throws Exception {
        if (slave != null) {
            slave.stop();
        }
        if (master != null) {
            master.stop();
        }
    }



    private void createAndStartMaster() throws Exception {
        master = new BrokerService();
        master.setDeleteAllMessagesOnStartup(true);
        master.setUseJmx(false);
        master.setBrokerName("BROKER");
        master.addConnector(MASTER_BIND_ADDRESS);
        master.start();
        master.waitUntilStarted();
    }

    private void createAndStartSlave() throws Exception {
        slave = new BrokerService();
        slave.setUseJmx(false);
        slave.setBrokerName("BROKER");
        slave.addConnector(SLAVE_BIND_ADDRESS);

        // Start the slave asynchronously, since this will block
        new Thread(new Runnable() {
            public void run() {
                try {
                    slaveThreadStarted.countDown();
                    slave.start();
                    LOG.info("slave has started");
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

        }).start();
    }

    public void testFailover() throws Exception {
        
        ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(BROKER_URL);
        Connection connection = factory.createConnection();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

        ActiveMQResourceAdapter adapter = new ActiveMQResourceAdapter();
        adapter.setServerUrl(BROKER_URL);
        adapter.start(new StubBootstrapContext());

        final CountDownLatch messageDelivered = new CountDownLatch(1);

        final StubMessageEndpoint endpoint = new StubMessageEndpoint() {
            public void onMessage(Message message) {
                LOG.info("Received message " + message);
                super.onMessage(message);
                messageDelivered.countDown();
            };
        };

        ActiveMQActivationSpec activationSpec = new ActiveMQActivationSpec();
        activationSpec.setDestinationType(Queue.class.getName());
        activationSpec.setDestination("TEST");
        activationSpec.setResourceAdapter(adapter);
        activationSpec.validate();

        MessageEndpointFactory messageEndpointFactory = new MessageEndpointFactory() {
            public MessageEndpoint createEndpoint(XAResource resource) throws UnavailableException {
                endpoint.xaresource = resource;
                return endpoint;
            }

            public boolean isDeliveryTransacted(Method method) throws NoSuchMethodException {
                return true;
            }
        };

        // Activate an Endpoint
        adapter.endpointActivation(messageEndpointFactory, activationSpec);

        // Give endpoint a moment to setup and register its listeners
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
        }

        MessageProducer producer = session.createProducer(new ActiveMQQueue("TEST"));
        slaveThreadStarted.await(10, TimeUnit.SECONDS);
        
        // force a failover before send
        LOG.info("Stopping master to force failover..");
        master.stop();
        master = null;
        assertTrue("slave started ok", slave.waitUntilStarted());

        producer.send(session.createTextMessage("Hello, again!"));

        // Wait for the message to be delivered.
        assertTrue(messageDelivered.await(5000, TimeUnit.MILLISECONDS));                
    }


    private static final class StubBootstrapContext implements BootstrapContext {
        public WorkManager getWorkManager() {
            return new WorkManager() {
                public void doWork(Work work) throws WorkException {
                    new Thread(work).start();
                }

                public void doWork(Work work, long arg1, ExecutionContext arg2, WorkListener arg3) throws WorkException {
                    new Thread(work).start();
                }

                public long startWork(Work work) throws WorkException {
                    new Thread(work).start();
                    return 0;
                }

                public long startWork(Work work, long arg1, ExecutionContext arg2, WorkListener arg3) throws WorkException {
                    new Thread(work).start();
                    return 0;
                }

                public void scheduleWork(Work work) throws WorkException {
                    new Thread(work).start();
                }

                public void scheduleWork(Work work, long arg1, ExecutionContext arg2, WorkListener arg3) throws WorkException {
                    new Thread(work).start();
                }
            };
        }

        public XATerminator getXATerminator() {
            return null;
        }

        public Timer createTimer() throws UnavailableException {
            return null;
        }
    }

    public class StubMessageEndpoint implements MessageEndpoint, MessageListener {
        public int messageCount;
        public XAResource xaresource;
        public Xid xid;

        public void beforeDelivery(Method method) throws NoSuchMethodException, ResourceException {
            try {
                if (xid == null) {
                    xid = createXid();
                }
                xaresource.start(xid, 0);
            } catch (Throwable e) {
                throw new ResourceException(e);
            }
        }

        public void afterDelivery() throws ResourceException {
            try {
                xaresource.end(xid, XAResource.TMSUCCESS);
                xaresource.prepare(xid);
                xaresource.commit(xid, false);
            } catch (Throwable e) {
                e.printStackTrace();
                throw new ResourceException(e);
            }
        }

        public void release() {
        }

        public void onMessage(Message message) {
            messageCount++;
        }

    }
    
    public Xid createXid() throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DataOutputStream os = new DataOutputStream(baos);
        os.writeLong(++txGenerator);
        os.close();
        final byte[] bs = baos.toByteArray();

        return new Xid() {
            public int getFormatId() {
                return 86;
            }

            public byte[] getGlobalTransactionId() {
                return bs;
            }

            public byte[] getBranchQualifier() {
                return bs;
            }
        };
    }

}

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