org/objectweb/proactive/core/body/ft/protocols/pmlrb/managers/HalfFTManagerPMLRB.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.body.ft.protocols.pmlrb.managers;

import java.net.MalformedURLException;
import java.rmi.Naming;
import java.rmi.NotBoundException;
import java.rmi.RemoteException;

import org.apache.log4j.Logger;
import org.objectweb.proactive.core.ProActiveException;
import org.objectweb.proactive.core.ProActiveRuntimeException;
import org.objectweb.proactive.core.body.AbstractBody;
import org.objectweb.proactive.core.body.UniversalBody;
import org.objectweb.proactive.core.body.ft.checkpointing.CheckpointInfo;
import org.objectweb.proactive.core.body.ft.internalmsg.FTMessage;
import org.objectweb.proactive.core.body.ft.protocols.FTManager;
import org.objectweb.proactive.core.body.ft.protocols.pmlrb.infos.MessageInfoPMLRB;
import org.objectweb.proactive.core.body.ft.servers.location.LocationServer;
import org.objectweb.proactive.core.body.reply.Reply;
import org.objectweb.proactive.core.body.request.Request;
import org.objectweb.proactive.core.config.ProActiveConfiguration;
import org.objectweb.proactive.core.util.log.Loggers;
import org.objectweb.proactive.core.util.log.ProActiveLogger;
import org.objectweb.proactive.ext.security.exceptions.RenegotiateSessionException;


public class HalfFTManagerPMLRB extends FTManager {
    //logger
    protected static Logger logger = ProActiveLogger.getLogger(Loggers.FAULT_TOLERANCE_PML);

    //sequence number of sending for any messages
    private char sendNumber;
    private MessageInfoPMLRB requestInfos;

    public int init(AbstractBody owner) throws ProActiveException {
        //super.init(owner);        
        try {
            String urlGlobal = ProActiveConfiguration.getGlobalFTServer();
            if (urlGlobal != null) {
                this.location = (LocationServer) (Naming.lookup(urlGlobal));
            } else {
                String urlLocation = ProActiveConfiguration.getLocationServer();
                if (urlLocation != null) {
                    this.location = (LocationServer) (Naming.lookup(urlLocation));
                } else {
                    throw new ProActiveException(
                        "Unable to init HalfFTManager : servers are not correctly set");
                }
            }
            this.storage = null;
            this.recovery = null;
        } catch (MalformedURLException e) {
            throw new ProActiveException("Unable to init HalfFTManager : FT is disable.",
                e);
        } catch (RemoteException e) {
            throw new ProActiveException("Unable to init HalfFTManager : FT is disable.",
                e);
        } catch (NotBoundException e) {
            throw new ProActiveException("Unable to init HalfFTManager : FT is disable.",
                e);
        }
        this.sendNumber = 0;
        this.requestInfos = new MessageInfoPMLRB();
        logger.info(" PML fault-tolerance is enabled for half body " +
            this.ownerID);
        return 0;
    }

    public int onReceiveReply(Reply reply) {
        reply.setFTManager(this);
        return 0;
    }

    public int onDeliverReply(Reply reply) {
        return FTManager.NON_FT;
    }

    public int onSendReplyBefore(Reply reply) {
        return 0;
    }

    public int onSendReplyAfter(Reply reply, int rdvValue,
        UniversalBody destination) {
        return 0;
    }

    public int onSendRequestBefore(Request request) {
        this.requestInfos.sentSequenceNumber = this.getNextSendNumber();
        request.setMessageInfo(this.requestInfos);
        return 0;
    }

    public int onSendRequestAfter(Request request, int rdvValue,
        UniversalBody destination) throws RenegotiateSessionException {
        return 0;
    }

    private synchronized char getNextSendNumber() {
        return ++sendNumber;
    }

    // UNCALLABLE METHODS //
    public int onReceiveRequest(Request request) {
        throw new ProActiveRuntimeException(HALF_BODY_EXCEPTION_MESSAGE);
    }

    public int onDeliverRequest(Request request) {
        throw new ProActiveRuntimeException(HALF_BODY_EXCEPTION_MESSAGE);
    }

    public int onServeRequestBefore(Request request) {
        throw new ProActiveRuntimeException(HALF_BODY_EXCEPTION_MESSAGE);
    }

    public int onServeRequestAfter(Request request) {
        throw new ProActiveRuntimeException(HALF_BODY_EXCEPTION_MESSAGE);
    }

    public int beforeRestartAfterRecovery(CheckpointInfo ci, int inc) {
        throw new ProActiveRuntimeException(HALF_BODY_EXCEPTION_MESSAGE);
    }

    public int getIncarnation() {
        throw new ProActiveRuntimeException(HALF_BODY_EXCEPTION_MESSAGE);
    }

    public Object handleFTMessage(FTMessage fte) {
        throw new ProActiveRuntimeException(HALF_BODY_EXCEPTION_MESSAGE);
    }
}

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