activemq-core/src/test/java/org/apache/activemq/bugs/AMQ3529Test.java

/**
 * 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
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package org.apache.activemq.bugs;

import java.util.Properties;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AMQ3529Test {

    private static Logger LOG = LoggerFactory.getLogger(AMQ3529Test.class);

    private ConnectionFactory connectionFactory;
    private Connection connection;
    private Session session;
    private BrokerService broker;
    private String connectionUri;
    private MessageConsumer consumer;
    private Context ctx = null;

    @Before
    public void startBroker() throws Exception {
        broker = new BrokerService();
        broker.setDeleteAllMessagesOnStartup(true);
        broker.setPersistent(false);
        broker.setUseJmx(false);
        broker.addConnector("tcp://0.0.0.0:0");
        broker.start();
        broker.waitUntilStarted();

        connectionUri = broker.getTransportConnectors().get(0).getPublishableConnectString();

        connectionFactory = new ActiveMQConnectionFactory(connectionUri);
    }

    @After
    public void stopBroker() throws Exception {
        broker.stop();
        broker.waitUntilStopped();
    }

    @Test(timeout = 60000)
    public void testInterruptionAffects() throws Exception {
        ThreadGroup tg = new ThreadGroup("tg");

        assertEquals(0, tg.activeCount());

        Thread client = new Thread(tg, "client") {

            @Override
            public void run() {
                try {
                    connection = connectionFactory.createConnection();
                    session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
                    assertNotNull(session);

                    Properties props = new Properties();
                    props.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.apache.activemq.jndi.ActiveMQInitialContextFactory");
                    props.setProperty(Context.PROVIDER_URL, "tcp://0.0.0.0:0");
                    ctx = null;
                    try {
                        ctx = new InitialContext(props);
                    } catch (NoClassDefFoundError e) {
                        throw new NamingException(e.toString());
                    } catch (Exception e) {
                        throw new NamingException(e.toString());
                    }
                    Destination destination = (Destination) ctx.lookup("dynamicTopics/example.C");
                    consumer = session.createConsumer(destination);
                    consumer.receive(10000);
                } catch (Exception e) {
                    // Expect an exception here from the interrupt.
                } finally {
                    // next line is the nature of the test, if I remove this
                    // line, everything works OK
                    try {
                        consumer.close();
                    } catch (JMSException e) {
                        fail("Consumer Close failed with" + e.getMessage());
                    }
                    try {
                        session.close();
                    } catch (JMSException e) {
                        fail("Session Close failed with" + e.getMessage());
                    }
                    try {
                        connection.close();
                    } catch (JMSException e) {
                        fail("Connection Close failed with" + e.getMessage());
                    }
                    try {
                        ctx.close();
                    } catch (Exception e) {
                        fail("Connection Close failed with" + e.getMessage());
                    }
                }
            }
        };
        client.start();
        Thread.sleep(5000);
        client.interrupt();
        client.join();
        Thread.sleep(2000);
        Thread[] remainThreads = new Thread[tg.activeCount()];
        tg.enumerate(remainThreads);
        for (Thread t : remainThreads) {
            if (t.isAlive() && !t.isDaemon())
                fail("Remaining thread: " + t.toString());
        }

        ThreadGroup root = Thread.currentThread().getThreadGroup().getParent();
        while (root.getParent() != null) {
            root = root.getParent();
        }
        visit(root, 0);
    }

    // This method recursively visits all thread groups under `group'.
    public static void visit(ThreadGroup group, int level) {
        // Get threads in `group'
        int numThreads = group.activeCount();
        Thread[] threads = new Thread[numThreads * 2];
        numThreads = group.enumerate(threads, false);

        // Enumerate each thread in `group'
        for (int i = 0; i < numThreads; i++) {
            // Get thread
            Thread thread = threads[i];
            LOG.debug("Thread:" + thread.getName() + " is still running");
        }

        // Get thread subgroups of `group'
        int numGroups = group.activeGroupCount();
        ThreadGroup[] groups = new ThreadGroup[numGroups * 2];
        numGroups = group.enumerate(groups, false);

        // Recursively visit each subgroup
        for (int i = 0; i < numGroups; i++) {
            visit(groups[i], level + 1);
        }
    }
}