proposal/mutant/src/java/remote/org/apache/ant/remote/RemoteMain.java

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.ant.remote;

import java.net.URL;
import java.net.URLClassLoader;
import java.lang.reflect.Method;

/**
 * Command line to run Ant core from a remote server
 *
 * @author Conor MacNeill
 * @created 27 January 2002
 */
public class RemoteMain {
    /**
     * The main program for the RemoteLauncher class
     *
     * @param args The command line arguments
     * @exception Exception if the launcher encounters a problem
     */
    public static void main(String[] args) throws Exception {

        if (args.length == 0) {
            throw new Exception("You must specify the location of the " 
                + "remote server");
        }
        
        String antHome = args[0];

        URL[] remoteStart = new URL[1];
        remoteStart[0] = new URL(antHome + "/lib/start.jar");
        URLClassLoader remoteLoader = new URLClassLoader(remoteStart);

        String[] realArgs = new String[args.length - 1];
        System.arraycopy(args, 1, realArgs, 0, realArgs.length);

        System.out.print("Loading remote Ant ... ");
        Class launcher 
            = Class.forName("org.apache.ant.start.Main", true, remoteLoader);

        final Class[] param = {Class.forName("[Ljava.lang.String;")};
        final Method startMethod = launcher.getMethod("main", param);
        final Object[] arguments = {realArgs};
        System.out.println("Done");
        System.out.println("Starting Ant from remote server");
        startMethod.invoke(null, arguments);
    }
}