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ActiveMQ example source code file (BrokerMojo.java)

This example ActiveMQ source code file (BrokerMojo.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

abstractmojo, activemq, brokerservice, exception, exception, interruptedexception, loading, loading, mojoexecutionexception, mojoexecutionexception, properties, string, thread, thread, util

The ActiveMQ BrokerMojo.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.maven;

/**
 * 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.
 */

import java.util.Properties;

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

/**
 * Goal which starts an activemq broker.
 * 
 * @goal run
 * @phase process-sources
 */
public class BrokerMojo extends AbstractMojo {
    /**
     * The maven project.
     * 
     * @parameter expression="${project}"
     * @required
     * @readonly
     */
    protected MavenProject project;

    /**
     * The broker configuration uri The list of currently supported URI syntaxes
     * is described <a
     * href="http://activemq.apache.org/how-do-i-embed-a-broker-inside-a-connection.html">here</a>
     * 
     * @parameter expression="${configUri}"
     *            default-value="broker:(tcp://localhost:61616)?useJmx=false&persistent=false"
     * @required
     */
    private String configUri;

    /**
     * Indicates whether to fork the broker, useful for integration tests.
     * 
     * @parameter expression="${fork}" default-value="false"
     */
    private boolean fork;

    /**
     * System properties to add
     * 
     * @parameter expression="${systemProperties}"
     */
    private Properties systemProperties;

    public void execute() throws MojoExecutionException {
        try {
            setSystemProperties();
            getLog().info("Loading broker configUri: " + configUri);

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

    /**
     * Wait for a shutdown invocation elsewhere
     * 
     * @throws Exception
     */
    protected void waitForShutdown(BrokerService broker) throws Exception {
        final boolean[] shutdown = new boolean[] {
            false
        };
        Runtime.getRuntime().addShutdownHook(new Thread() {
            public void run() {
                synchronized (shutdown) {
                    shutdown[0] = true;
                    shutdown.notify();
                }
            }
        });

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

        // Stop broker
        broker.stop();
    }

    /**
     * Set system properties
     */
    protected void setSystemProperties() {
        // Set the default properties
        System.setProperty("activemq.base", project.getBuild().getDirectory() + "/");
        System.setProperty("activemq.home", project.getBuild().getDirectory() + "/");
        System.setProperty("org.apache.activemq.UseDedicatedTaskRunner", "true");
        System.setProperty("org.apache.activemq.default.directory.prefix", project.getBuild().getDirectory() + "/");
        System.setProperty("derby.system.home", project.getBuild().getDirectory() + "/");
        System.setProperty("derby.storage.fileSyncTransactionLog", "true");

        // Overwrite any custom properties
        System.getProperties().putAll(systemProperties);
    }
}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ BrokerMojo.java source code file:

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