Java tutorial
/** * 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.broker.jmx; import org.apache.activemq.ActiveMQConnectionFactory; import org.apache.activemq.EmbeddedBrokerTestSupport; import org.apache.activemq.broker.BrokerService; import org.apache.activemq.broker.region.RegionBroker; import org.apache.activemq.command.ActiveMQQueue; import org.apache.activemq.store.kahadb.KahaDBPersistenceAdapter; import org.apache.commons.io.FileUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.jms.Connection; import javax.jms.ConnectionFactory; import javax.jms.Message; import javax.jms.MessageProducer; import javax.jms.Session; import javax.management.MBeanServer; import javax.management.MBeanServerInvocationHandler; import javax.management.MalformedObjectNameException; import javax.management.ObjectName; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; public class ConcurrentMoveTest extends EmbeddedBrokerTestSupport { private static final Logger LOG = LoggerFactory.getLogger(ConcurrentMoveTest.class); protected MBeanServer mbeanServer; protected String domain = "org.apache.activemq"; protected Connection connection; protected boolean transacted; protected int authMode = Session.AUTO_ACKNOWLEDGE; protected int messageCount = 2000; public void testConcurrentMove() throws Exception { // Send some messages connection = connectionFactory.createConnection(); connection.start(); Session session = connection.createSession(transacted, authMode); destination = createDestination(); MessageProducer producer = session.createProducer(destination); for (int i = 0; i < messageCount; i++) { Message message = session.createTextMessage("Message: " + i); producer.send(message); } long usageBeforMove = broker.getPersistenceAdapter().size(); LOG.info("Store usage:" + usageBeforMove); // Now get the QueueViewMBean and purge String objectNameStr = broker.getBrokerObjectName().toString(); objectNameStr += ",destinationType=Queue,destinationName=" + getDestinationString(); ObjectName queueViewMBeanName = assertRegisteredObjectName(objectNameStr); final QueueViewMBean proxy = (QueueViewMBean) MBeanServerInvocationHandler.newProxyInstance(mbeanServer, queueViewMBeanName, QueueViewMBean.class, true); final ActiveMQQueue to = new ActiveMQQueue("TO"); ((RegionBroker) broker.getRegionBroker()).addDestination(broker.getAdminConnectionContext(), to, false); ExecutorService executorService = Executors.newCachedThreadPool(); for (int i = 0; i < 50; i++) { executorService.execute(new Runnable() { @Override public void run() { try { proxy.moveMatchingMessagesTo(null, to.getPhysicalName()); } catch (Exception e) { e.printStackTrace(); } } }); } executorService.shutdown(); executorService.awaitTermination(5, TimeUnit.MINUTES); long count = proxy.getQueueSize(); assertEquals("Queue size", count, 0); assertEquals("Browse size", proxy.browseMessages().size(), 0); objectNameStr = broker.getBrokerObjectName().toString(); objectNameStr += ",destinationType=Queue,destinationName=" + to.getQueueName(); queueViewMBeanName = assertRegisteredObjectName(objectNameStr); QueueViewMBean toProxy = (QueueViewMBean) MBeanServerInvocationHandler.newProxyInstance(mbeanServer, queueViewMBeanName, QueueViewMBean.class, true); count = toProxy.getQueueSize(); assertEquals("Queue size", count, messageCount); long usageAfterMove = broker.getPersistenceAdapter().size(); LOG.info("Store usage, before: " + usageBeforMove + ", after:" + usageAfterMove); LOG.info("Store size increase:" + FileUtils.byteCountToDisplaySize(usageAfterMove - usageBeforMove)); assertTrue("Usage not more than doubled", usageAfterMove < (usageBeforMove * 3)); producer.close(); } protected ObjectName assertRegisteredObjectName(String name) throws MalformedObjectNameException, NullPointerException { ObjectName objectName = new ObjectName(name); if (mbeanServer.isRegistered(objectName)) { LOG.info("Bean Registered: " + objectName); } else { fail("Could not find MBean!: " + objectName); } return objectName; } protected void setUp() throws Exception { bindAddress = "tcp://localhost:0"; useTopic = false; super.setUp(); mbeanServer = broker.getManagementContext().getMBeanServer(); } protected void tearDown() throws Exception { if (connection != null) { connection.close(); connection = null; } super.tearDown(); } protected BrokerService createBroker() throws Exception { BrokerService answer = new BrokerService(); answer.setUseJmx(true); answer.setEnableStatistics(true); answer.addConnector(bindAddress); ((KahaDBPersistenceAdapter) answer.getPersistenceAdapter()).setConcurrentStoreAndDispatchQueues(false); answer.deleteAllMessages(); return answer; } @Override protected ConnectionFactory createConnectionFactory() throws Exception { return new ActiveMQConnectionFactory(broker.getTransportConnectors().get(0).getPublishableConnectString()); } /** * Returns the name of the destination used in this test case */ protected String getDestinationString() { return getClass().getName() + "." + getName(true); } }