org/objectweb/proactive/calcium/MultiThreadedManager.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;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class MultiThreadedManager extends ResourceManager{
        
        ExecutorService threadPool;  //Thread pool
        int numThreads;                          //Maximum number of threads to be used
        
        public MultiThreadedManager(int numThreads){
                
                this.threadPool=Executors.newFixedThreadPool(numThreads);
                this.numThreads=numThreads;
        }
        
        @Override
        public  Skernel boot(Skernel skernel) {
                
                for(int i=0;i<numThreads;i++){
                        threadPool.submit(new CallableInterpreter(skernel));
                }
                return skernel;
        }
        
        @Override
        public void shutdown(){
                threadPool.shutdownNow();
        }
        
        protected class CallableInterpreter extends Interpreter implements Callable<Task<?>>{
                
                Skernel skernel;
                
                public CallableInterpreter(Skernel skernel){
                        this.skernel=skernel;
                }

                public Task<?> call() throws Exception {
                        
                        Task<?> task = skernel.getReadyTask(DEFAULT_GET_READY_TASK_TIMEOUT);
                        
                        while(task!=null){
                                task = super.interpret(task);
                                skernel.putTask(task);
                                task = skernel.getReadyTask(DEFAULT_GET_READY_TASK_TIMEOUT);
                        }
                        return task;
                }
        }
}

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