activemq-unit-tests/src/test/java/org/apache/activemq/ConnectionCloseMultipleTimesConcurrentTest.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
 * limitations under the License.
 */
package org.apache.activemq;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import javax.jms.JMSException;
import javax.jms.Session;

import junit.framework.TestCase;

/**
 * 
 */
public class ConnectionCloseMultipleTimesConcurrentTest extends TestCase {

    private ActiveMQConnection connection;
    private ExecutorService executor;
    private int size = 200;

    protected void setUp() throws Exception {
        executor = Executors.newFixedThreadPool(20);

        ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost");
        connection = (ActiveMQConnection)factory.createConnection();
        connection.start();
    }

    /**
     * @see junit.framework.TestCase#tearDown()
     */
    protected void tearDown() throws Exception {
        if (connection.isStarted()) {
            connection.stop();
        }
        if (executor != null) {
            executor.shutdownNow();
        }
    }

    /**
     * @throws javax.jms.JMSException
     */
    public void testCloseMultipleTimes() throws Exception {
        connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

        assertTrue(connection.isStarted());
        assertFalse(connection.isClosed());

        final CountDownLatch latch = new CountDownLatch(size);

        for (int i = 0; i < size; i++) {
            executor.submit(new Runnable() {
                @Override
                public void run() {
                    try {
                        connection.close();

                        assertFalse(connection.isStarted());
                        assertTrue(connection.isClosed());

                        latch.countDown();
                    } catch (JMSException e) {
                        // ignore
                    }
                }
            });
        }

        boolean zero = latch.await(20, TimeUnit.SECONDS);
        assertTrue("Should complete all", zero);

        // should not fail calling again
        connection.close();

        assertFalse(connection.isStarted());
        assertTrue(connection.isClosed());
    }

}