org/objectweb/proactive/calcium/proactive/ActiveObjectSkernel.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.calcium.proactive;

import java.io.Serializable;

import org.objectweb.proactive.Body;
import org.objectweb.proactive.RunActive;
import org.objectweb.proactive.Service;
import org.objectweb.proactive.calcium.Skernel;
import org.objectweb.proactive.calcium.Task;
import org.objectweb.proactive.core.body.request.Request;
import org.objectweb.proactive.core.body.request.RequestFilter;

public class ActiveObjectSkernel<T> extends Skernel implements RunActive, Serializable {

        public ActiveObjectSkernel(){
        }

        public ActiveObjectSkernel(Skernel skernel){
                super();
                
                while(skernel.getReadyQueueLength() >0){
                        this.putTask(skernel.getReadyTask(0));
                }
        }

        //Producer-Consumer
        public void runActivity(Body body) {
                Service service = new Service(body);
                
                while(true){
                        String allowedMethodNames="getStats|putTask|getReadyQueueLength|hasResults|isFinished|isPaniqued|getStatsGlobal";
                        
                        if(getReadyQueueLength() > 0 ) allowedMethodNames +="getReadyTask|";
                        if(hasResults()) allowedMethodNames += "getResult|";
                        
                        service.blockingServeOldest( new RequestFilterOnAllowedMethods(allowedMethodNames));
                }
        }
        
        @SuppressWarnings("unchecked")
        public Task<?> getReadyTask(){
                Task<?> task= super.getReadyTask(0);
                if(task==null){    //ProActive doesn't handle null
                        task= new Task<T>();
                        task.setDummy();
                        return task;   //return dummy task
                }
                return task;
        }
        
        protected class RequestFilterOnAllowedMethods implements RequestFilter,
        java.io.Serializable {
        private String allowedMethodNames;

        public RequestFilterOnAllowedMethods(String allowedMethodNames) {
            this.allowedMethodNames = allowedMethodNames;
        }

        public boolean acceptRequest(Request request) {
            return allowedMethodNames.indexOf(request.getMethodName())>=0;
        }
    }
}

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