org/objectweb/proactive/core/component/request/Shortcut.java

/* 
 * ################################################################
 * 
 * ProActive: The Java(TM) library for Parallel, Distributed, 
 *            Concurrent computing with Security and Mobility
 * 
 * Copyright (C) 1997-2007 INRIA/University of Nice-Sophia Antipolis
 * Contact: proactive@objectweb.org
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 *  
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 *  
 *  Initial developer(s):               The ProActive Team
 *                        http://www.inria.fr/oasis/ProActive/contacts.html
 *  Contributor(s): 
 * 
 * ################################################################
 */ 
package org.objectweb.proactive.core.component.request;

import java.io.Serializable;
import java.util.List;
import java.util.Vector;

import org.apache.log4j.Logger;
import org.objectweb.proactive.core.body.UniversalBody;
import org.objectweb.proactive.core.component.representative.ItfID;
import org.objectweb.proactive.core.util.log.Loggers;
import org.objectweb.proactive.core.util.log.ProActiveLogger;


public class Shortcut implements Serializable {
    public static Logger logger = ProActiveLogger.getLogger(Loggers.COMPONENTS_REQUESTS);
    private transient UniversalBody sender;
    private List<UniversalBody> steps; // the list of crossed membranes; TODO_M transient 

    // FIXME replace with a custom list with custom serialization of contained bodies 
    private String fcFunctionalInterfaceName;

    public Shortcut() {
    }

    public Shortcut(String functionalInterfaceName, UniversalBody sender,
        UniversalBody intermediate) {
        fcFunctionalInterfaceName = functionalInterfaceName;
        steps = new Vector<UniversalBody>();
        this.sender = sender;
        steps.add(intermediate);
    }

    public UniversalBody getSender() {
        return sender;
    }

    public void setSender(UniversalBody sender) {
        this.sender = sender;
    }

    public int length() {
        return steps.size();
    }

    public void updateDestination(UniversalBody destination) {
        if (logger.isDebugEnabled()) {
            logger.debug("adding a new step to the shortcut chain");
        }
        steps.add(destination);
    }

    public String getFcFunctionalInterfaceName() {
        return fcFunctionalInterfaceName;
    }

    public ItfID getLinkedInterfaceID() {
        // it is the first encountered interface while creating the shortcut
        return new ItfID(fcFunctionalInterfaceName,
            steps.get(0).getID());
    }

    public ItfID getShortcutInterfaceID() {
        // it is the last encountered interface while creating the shortcut
        return new ItfID(fcFunctionalInterfaceName,
            steps.get(steps.size() - 1).getID());
    }

    public UniversalBody getShortcutTargetBody() {
        return steps.get(steps.size() - 1);
    }

    //
    // -- PRIVATE METHODS FOR SERIALIZATION -----------------------------------------------
    //
    private void writeObject(java.io.ObjectOutputStream out)
        throws java.io.IOException {
        out.defaultWriteObject();
        out.writeObject(sender.getRemoteAdapter());
    }

    private void readObject(java.io.ObjectInputStream in)
        throws java.io.IOException, ClassNotFoundException {
        in.defaultReadObject();
        sender = (UniversalBody) in.readObject(); // it is actually a UniversalBody
    }
}

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