ActiveMQ example source code file (DurableSubscriptionActivationTest.java)

This example ActiveMQ source code file (DurableSubscriptionActivationTest.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, activemqdestination, activemqtopic, amqpersistenceadapter, brokerservice, connection, connection, exception, exception, file, io, more, more, subsid, subsid

The ActiveMQ DurableSubscriptionActivationTest.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.io.File;

import javax.jms.Connection;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.Destination;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.store.amq.AMQPersistenceAdapter;

public class DurableSubscriptionActivationTest extends org.apache.activemq.TestSupport {

    private BrokerService broker;
    private Connection connection;
    private ActiveMQTopic topic;

    protected ActiveMQConnectionFactory createConnectionFactory() throws Exception {
        return new ActiveMQConnectionFactory("vm://" + getName());
    }

    protected Connection createConnection() throws Exception {
        Connection rc = super.createConnection();
        rc.setClientID(getName());
        return rc;
    }

    protected void setUp() throws Exception {
        topic = (ActiveMQTopic) createDestination();
        createBroker();
        super.setUp();
    }

    protected void tearDown() throws Exception {
        super.tearDown();
        destroyBroker();
    }

    protected void restartBroker() throws Exception {
        destroyBroker();
        createBroker();
    }

    private void createBroker() throws Exception {
        broker = BrokerFactory.createBroker("broker:(vm://localhost)");
        broker.setKeepDurableSubsActive(true);
        broker.setPersistent(true);
        AMQPersistenceAdapter persistenceAdapter = new AMQPersistenceAdapter();
        persistenceAdapter.setDirectory(new File("activemq-data/" + getName()));
        broker.setPersistenceAdapter(persistenceAdapter);
        broker.setBrokerName(getName());

        // only if we pre-create the destinations
        broker.setDestinations(new ActiveMQDestination[]{topic});

        broker.start();

        connection = createConnection();
    }

    private void destroyBroker() throws Exception {
        if (connection != null)
            connection.close();
        if (broker != null)
            broker.stop();
    }

    public void testActivateWithExistingTopic() throws Exception {
        // create durable subscription
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        session.createDurableSubscriber(topic, "SubsId");

        Destination d = broker.getDestination(topic);
        assertTrue("More than one consumer.", d.getConsumers().size() == 1);
        
        // restart the broker
        restartBroker();

        // activate
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        session.createDurableSubscriber(topic, "SubsId");

        assertTrue("More than one consumer.", d.getConsumers().size() == 1);

        // re-activate
        connection.close();
        connection = createConnection();
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        session.createDurableSubscriber(topic, "SubsId");

        assertTrue("More than one consumer.", d.getConsumers().size() == 1);
    }
}