ActiveMQ example source code file (ServerMojo.java)

This example ActiveMQ source code file (ServerMojo.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, file, file, filechannel, filechannel, io, ioexception, ioexception, mappedbytebuffer, mojoexecutionexception, nio, servermojo, string, string

The ActiveMQ ServerMojo.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;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;

import org.apache.activemq.console.Main;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;

/**
 * Goal which starts activemq broker.
 * 
 * @goal broker
 * @phase process-sources
 */
public class ServerMojo extends AbstractMojo {
    /**
     * Location of the output directory. Defaults to target.
     * 
     * @parameter expression="${project.build.directory}"
     * @required
     */
    private File outputDirectory;

    /**
     * Location of the predefined config files.
     * 
     * @parameter expression="${configDirectory}"
     *            default-value="${basedir}/src/main/resources/broker-conf"
     * @required
     */
    private String configDirectory;

    /**
     * Type of activemq configuration to use. This is also the filename used.
     * 
     * @parameter expression="${configType}" default-value="activemq"
     * @required
     */
    private String configType;

    /**
     * Location of activemq config file other those found in resources/config.
     * 
     * @parameter expression="${configFile}"
     */
    private File configFile;

    /**
     * Broker URL.
     * 
     * @parameter expression="${url}"
     */
    private String url;

    public void execute() throws MojoExecutionException {

        File out = outputDirectory;

        // Create output directory if it doesn't exist.
        if (!out.exists()) {
            out.mkdirs();
        }

        String[] args = new String[2];
        if (url != null) {
            args[0] = "start";
            args[1] = url;
        } else {
            File config;
            if (configFile != null) {
                config = configFile;
            } else {

                config = new File(configDirectory + File.separator + configType + ".xml");
            }

            try {
                config = copy(config);
            } catch (IOException e) {
                throw new MojoExecutionException(e.getMessage());
            }
            args[0] = "start";
            args[1] = "xbean:" + (config.toURI()).toString();
        }

        Main.main(args);
    }

    /**
     * Copy activemq configuration file to output directory.
     * 
     * @param source
     * @return
     * @throws IOException
     */
    public File copy(File source) throws IOException {
        FileChannel in = null;
        FileChannel out = null;

        File dest = new File(outputDirectory.getAbsolutePath() + File.separator + "activemq.xml");

        try {
            in = new FileInputStream(source).getChannel();
            out = new FileOutputStream(dest).getChannel();

            long size = in.size();
            MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY, 0, size);

            out.write(buf);

        } finally {
            if (in != null) {
                in.close();
            }
            if (out != null) {
                out.close();
            }
        }

        return dest;
    }
}