org/objectweb/proactive/core/component/collectiveitfs/GatherFuturesHandler.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.collectiveitfs;

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

import org.objectweb.proactive.Body;
import org.objectweb.proactive.ProActive;
import org.objectweb.proactive.RunActive;
import org.objectweb.proactive.Service;
import org.objectweb.proactive.core.body.future.FutureResult;
import org.objectweb.proactive.core.body.migration.MigrationException;
import org.objectweb.proactive.core.body.request.Request;
import org.objectweb.proactive.core.body.request.RequestFilter;
import org.objectweb.proactive.core.component.representative.ItfID;
import org.objectweb.proactive.core.exceptions.manager.ExceptionThrower;
import org.objectweb.proactive.core.node.Node;

public class GatherFuturesHandler implements RunActive, Serializable {
    List<ItfID> senders;
    List<?> resultOfGatheredInvocation;
    Throwable exceptionToRaise;
    String methodName = null;
    int step = 0;
    
    public GatherFuturesHandler() {
    }
  
    public void setFutureOfGatheredInvocation(FutureResult future) {
        if (future.getExceptionToRaise() != null) {
            exceptionToRaise = future.getExceptionToRaise();
        } else {
            // no cast for futures ==> need to get the result before casting
            resultOfGatheredInvocation = (List<?>) future.getResult();
            ProActive.waitFor(resultOfGatheredInvocation);
        }
    }

    // returns
    public Object distribute(ItfID sender) {
        if (exceptionToRaise != null) {
            ExceptionThrower.throwException(exceptionToRaise); // guillaume's exception thrower
        }

        // redistribution policies for results can be applied here
        return resultOfGatheredInvocation.get(senders.indexOf(sender));
    }

    public void migrateTo(Node node) throws MigrationException {
        ProActive.migrateTo(node);
    }

    public void setConnectedClientItfs(List<ItfID> connectedClientItfs) {
        senders = connectedClientItfs;
    }

    public void setMethodName(String methodName) {
        this.methodName = methodName;
    }
    
    public void passivate() {
        senders = null;
        methodName = null;
    }
    
    
    

    public void runActivity(Body body) {
        Service service = new Service(body);
        while (ProActive.getBodyOnThis().isActive()) {
            service.blockingServeOldest("setConnectedClientItfs");
            
            service.blockingServeOldest("setFutureOfGatheredInvocation");
            int i = 1;
            for (ItfID senderID : senders) {
                service.blockingServeOldest("distribute");
                i++;
            }
            
            service.blockingServeOldest("passivate");
            
        }
    }


}

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