org.apache.activemq.bugs.VMTransportClosureTest.java Source code

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Here is the source code for org.apache.activemq.bugs.VMTransportClosureTest.java

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/**
 * 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 java.io.IOException;

import javax.jms.MessageProducer;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.EmbeddedBrokerTestSupport;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.command.ShutdownInfo;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.transport.TransportFactory;
import org.apache.activemq.transport.TransportListener;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class VMTransportClosureTest extends EmbeddedBrokerTestSupport {
    private static final Log LOG = LogFactory.getLog(VMTransportClosureTest.class);
    private static final long MAX_TEST_TIME_MILLIS = 300000; // 5min
    private static final int NUM_ATTEMPTS = 100000;

    public void setUp() throws Exception {
        setAutoFail(true);
        setMaxTestTime(MAX_TEST_TIME_MILLIS);
        super.setUp();
    }

    /**
     * EmbeddedBrokerTestSupport.createBroker() binds the broker to a VM
     * transport address, which results in a call to
     * VMTransportFactory.doBind(location):
     * <p>
     * <code>
     *     public TransportServer doBind(URI location) throws IOException {
     *        return bind(location, false);
     *}
     *</code>
     * </p>
     * As a result, VMTransportServer.disposeOnDisconnect is <code>false</code>.
     * To expose the bug, we need to have VMTransportServer.disposeOnDisconnect
     * <code>true</code>, which is the case when the VMTransportServer is not
     * already bound when the first connection is made.
     */
    @Override
    protected BrokerService createBroker() throws Exception {
        BrokerService answer = new BrokerService();
        answer.setPersistent(isPersistent());
        // answer.addConnector(bindAddress);
        return answer;
    }

    /**
     * This test demonstrates how the "disposeOnDisonnect" feature of
     * VMTransportServer can incorrectly close all VM connections to the local
     * broker.
     */
    public void testPrematureClosure() throws Exception {

        // Open a persistent connection to the local broker. The persistent
        // connection is maintained through the test and should prevent the
        // VMTransportServer from stopping itself when the local transport is
        // closed.
        ActiveMQConnection persistentConn = (ActiveMQConnection) createConnection();
        persistentConn.start();
        Session session = persistentConn.createSession(true, Session.SESSION_TRANSACTED);
        MessageProducer producer = session.createProducer(destination);

        for (int i = 0; i < NUM_ATTEMPTS; i++) {
            LOG.info("Attempt: " + i);

            // Open and close a local transport connection. As is done by by
            // most users of the transport, ensure that the transport is stopped
            // when closed by the peer (via ShutdownInfo). Closing the local
            // transport should not affect the persistent connection.
            final Transport localTransport = TransportFactory.connect(broker.getVmConnectorURI());
            localTransport.setTransportListener(new TransportListener() {
                public void onCommand(Object command) {
                    if (command instanceof ShutdownInfo) {
                        try {
                            localTransport.stop();
                        } catch (Exception ex) {
                            throw new RuntimeException(ex);
                        }
                    }
                }

                public void onException(IOException error) {
                    // ignore
                }

                public void transportInterupted() {
                    // ignore
                }

                public void transportResumed() {
                    // ignore
                }
            });

            localTransport.start();
            localTransport.stop();

            // Ensure that the persistent connection is still usable.
            producer.send(session.createMessage());
            session.rollback();
        }

        persistentConn.close();
    }
}