/* * %W% %E% * * Copyright  1990-2006 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER *  * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 only, as published by the Free Software Foundation.  *  * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License version 2 for more details (a copy is * included at /legal/license.txt).  *  * You should have received a copy of the GNU General Public License * version 2 along with this work; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA  *  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 or visit www.sun.com if you need additional * information or have any questions.  */package com.sun.jump.executive;import com.sun.jump.common.JUMPProcess;import com.sun.jump.message.JUMPMessagingService;import java.util.HashMap;import java.util.Map;/** * <code>JUMPExecutive</code> hosts all the JUMP executive services.  * The services are declratively specified  * in a file, which allows the executive to be extended with new  * services.  *  * @see com.sun.jump.module.JUMPModule */public abstract class JUMPExecutive    implements JUMPProcess, JUMPMessagingService {    private static JUMPExecutive INSTANCE = null;        protected Map moduleFactoryMap = null;        /**     * Returns the singleton executive instance.     */     public static JUMPExecutive getInstance() {	return INSTANCE;    }        /**     * Creates a new instance of JUMPExecutive     */    protected  JUMPExecutive() {        synchronized (JUMPExecutive.class){            if ( INSTANCE == null ) {                INSTANCE = this;            }        }        this.moduleFactoryMap = new HashMap();    }        /**     * Initialize the executive. This method initializes the list of      * modules, by reading the module definitions from a property file. This     * method can be overriden to load the modules using some other      * mechanism, even possibly hardcoding the list of modules.     */    protected void initialize() {    }        /**     * Gets the User input manager configured with the executive.     */    public abstract JUMPUserInputManager getUserInputManager();    /**     * Gets the Isolate factory configured with the executive.     */    public abstract JUMPIsolateFactory getIsolateFactory();}