org.apache.activemq.maven.Broker Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of activemq-maven-plugin Show documentation

Customized version of the ActiveMQ Maven Plugin that registers publishable transport connector addresses in the Maven properties so that dynamic allocation of ports can easily be achieved. This project provides a port of the updates to the currently-released ActiveMQ version 5.10.0; the updates are expected to be released with ActiveMQ version 5.12.0, after which this version will no longer be maintained. See also AMQ-5499 (https://issues.apache.org/jira/browse/AMQ-5499).

The newest version!

/**
 * 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.maven;

import org.apache.activemq.broker.BrokerFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.maven.plugin.MojoExecutionException;

/**
 * Singleton facade between Maven and one ActiveMQ broker.
 */
public class Broker {

    private static BrokerService broker;

    private static boolean[] shutdown;

    private static Thread shutdownThread;

    public static void start(boolean fork, String configUri) throws MojoExecutionException {

        if (broker != null) {
            throw new MojoExecutionException("A local broker is already running");
        }

        try {
            broker = BrokerFactory.createBroker(configUri);
            if (fork) {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            broker.start();
                            waitForShutdown();
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                }).start();
            } else {
                broker.start();
                waitForShutdown();
            }
        } catch (Exception e) {
            throw new MojoExecutionException("Failed to start the ActiveMQ Broker", e);
        }
    }

    public static void stop() throws MojoExecutionException {

        if (broker == null) {
            throw new MojoExecutionException("The local broker is not running");
        }

        try {
            broker.stop();
            broker.waitUntilStopped();
            broker = null;

            Runtime.getRuntime().removeShutdownHook(shutdownThread);

            // Terminate the shutdown hook thread
            synchronized (shutdown) {
                shutdown[0] = true;
                shutdown.notify();
            }
        } catch (Exception e) {
            throw new MojoExecutionException("Failed to stop the ActiveMQ Broker", e);
        }
    }

    /**
     * Wait for a shutdown invocation elsewhere
     *
     * @throws Exception
     */
    protected static void waitForShutdown() throws Exception {
        shutdown = new boolean[] { false };

        shutdownThread = new Thread() {
            @Override
            public void run() {
                synchronized (shutdown) {
                    shutdown[0] = true;
                    shutdown.notify();
                }
            }
        };

        Runtime.getRuntime().addShutdownHook(shutdownThread);

        // Wait for any shutdown event
        synchronized (shutdown) {
            while (!shutdown[0]) {
                try {
                    shutdown.wait();
                } catch (InterruptedException e) {
                }
            }
        }

        // Stop broker
        if (broker != null) {
            broker.stop();
        }
    }

    /**
     * Return the broker service created.
     */
    public static BrokerService getBroker() {
        return broker;
    }

    /**
     * Override the default creation of the broker service.  Primarily added for testing purposes.
     *
     * @param broker
     */
    public static void setBroker(BrokerService broker) {
        Broker.broker = broker;
    }
}