org/objectweb/proactive/calcium/Stream.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.Hashtable;
import java.util.Vector;

import org.apache.log4j.Logger;
import org.objectweb.proactive.calcium.exceptions.MuscleException;
import org.objectweb.proactive.calcium.exceptions.PanicException;
import org.objectweb.proactive.calcium.interfaces.Instruction;
import org.objectweb.proactive.calcium.interfaces.Skeleton;
import org.objectweb.proactive.calcium.statistics.Stats;
import org.objectweb.proactive.core.util.log.Loggers;
import org.objectweb.proactive.core.util.log.ProActiveLogger;


public class Stream<T>{
        static Logger logger = ProActiveLogger.getLogger(Loggers.SKELETONS_KERNEL);
        
        private int streamId;
        private Facade facade;
        private Skeleton<T> skeleton;
        private int pendingTasks;
        
        private Hashtable<T, Stats> taskStats;
        protected Stream(Facade facade,  Skeleton<T> skeleton){
                
                this.streamId=(int)(Math.random()*Integer.MAX_VALUE);
                this.skeleton=skeleton;
                this.facade=facade;
                this.taskStats = new Hashtable<T, Stats>();
                this.pendingTasks=0;
        }

        public void input(T param){
                Vector<T> paramV= new Vector<T>(1);
                paramV.add(param);
                input(paramV);
        }
        
        public void input(Vector<T> paramV){
                
                Vector<Instruction<T>> v = (Vector<Instruction<T>>) skeleton.getInstructionStack();

                //Put the parameters in a Task container
                for(T param:paramV){
                        Task<T> task = new Task<T>(param);
                        task.setStack(v);
                        task.setStreamId(streamId);
                        facade.putTask(task); //add them to the ready queue in the kernel
                        pendingTasks++;
                }
        }
        
        @SuppressWarnings("unchecked")
        public T getResult() throws PanicException, MuscleException{
                if(pendingTasks==0) return null; //waiting for no results
        
                Task<T> task =  (Task<T>) facade.getResult(streamId);
                T res= task.getObject();
                
                taskStats.put(res,task.getStats());
                pendingTasks--;
                
                return res;
        }

        public Stats getStats(T res) {
                return this.taskStats.get(res);
        }
}

---