ActiveMQ example source code file (AMQ3145Test.java)

This example ActiveMQ source code file (AMQ3145Test.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, exception, exception, management, messageconsumer, objectname, pendingqueuemessagestoragepolicy, policyentry, policymap, queueviewmbean, queueviewmbean, string, string, textmessage

The ActiveMQ AMQ3145Test.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 javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.jmx.QueueViewMBean;
import org.apache.activemq.broker.region.policy.FilePendingQueueMessageStoragePolicy;
import org.apache.activemq.broker.region.policy.PendingQueueMessageStoragePolicy;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
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.assertEquals;
import static org.junit.Assert.assertTrue;

public class AMQ3145Test {
    private static final Logger LOG = LoggerFactory.getLogger(AMQ3145Test.class);
    private final String MESSAGE_TEXT = new String(new byte[1024]);
    BrokerService broker;
    ConnectionFactory factory;
    Connection connection;
    Session session;
    Queue queue;
    MessageConsumer consumer;

    @Before
    public void createBroker() throws Exception {
        createBroker(true);
    }

    public void createBroker(boolean deleteAll) throws Exception {
        broker = new BrokerService();
        broker.setDeleteAllMessagesOnStartup(deleteAll);
        broker.setDataDirectory("target/AMQ3145Test");
        broker.setUseJmx(true);
        broker.getManagementContext().setCreateConnector(false);
        broker.addConnector("tcp://localhost:0");
        broker.start();
        broker.waitUntilStarted();
        factory = new ActiveMQConnectionFactory(broker.getTransportConnectors().get(0).getConnectUri().toString());
        connection = factory.createConnection();
        connection.start();
        session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
    }

    @After
    public void tearDown() throws Exception {
        if (consumer != null) {
            consumer.close();
        }
        session.close();
        connection.stop();
        connection.close();
        broker.stop();
    }

    @Test
    public void testCacheDisableReEnable() throws Exception {
        createProducerAndSendMessages(1);
        QueueViewMBean proxy = getProxyToQueueViewMBean();
        assertTrue("cache is enabled", proxy.isCacheEnabled());
        tearDown();
        createBroker(false);
        proxy = getProxyToQueueViewMBean();
        assertEquals("one pending message", 1, proxy.getQueueSize());
        assertTrue("cache is disabled when there is a pending message", !proxy.isCacheEnabled());

        createConsumer(1);
        createProducerAndSendMessages(1);
        assertTrue("cache is enabled again on next send when there are no messages", proxy.isCacheEnabled());
    }

    private void applyBrokerSpoolingPolicy() {
        PolicyMap policyMap = new PolicyMap();
        PolicyEntry defaultEntry = new PolicyEntry();
        defaultEntry.setProducerFlowControl(false);
        PendingQueueMessageStoragePolicy pendingQueuePolicy = new FilePendingQueueMessageStoragePolicy();
        defaultEntry.setPendingQueuePolicy(pendingQueuePolicy);
        policyMap.setDefaultEntry(defaultEntry);
        broker.setDestinationPolicy(policyMap);
    }

    private QueueViewMBean getProxyToQueueViewMBean()
            throws MalformedObjectNameException, JMSException {
        ObjectName queueViewMBeanName = new ObjectName("org.apache.activemq"
                + ":Type=Queue,Destination=" + queue.getQueueName()
                + ",BrokerName=localhost");
        QueueViewMBean proxy = (QueueViewMBean) broker.getManagementContext()
                .newProxyInstance(queueViewMBeanName,
                        QueueViewMBean.class, true);
        return proxy;
    }

    private void createProducerAndSendMessages(int numToSend) throws Exception {
        queue = session.createQueue("test1");
        MessageProducer producer = session.createProducer(queue);
        for (int i = 0; i < numToSend; i++) {
            TextMessage message = session.createTextMessage(MESSAGE_TEXT + i);
            if (i  != 0 && i % 50000 == 0) {
                LOG.info("sent: " + i);
            }
            producer.send(message);
        }
        producer.close();
    }

    private void createConsumer(int numToConsume) throws Exception {
        consumer = session.createConsumer(queue);
        // wait for buffer fill out
        for (int i = 0; i < numToConsume; ++i) {
            Message message = consumer.receive(2000);
            message.acknowledge();
        }
        consumer.close();
    }
}