org/objectweb/proactive/core/group/spmd/ProActiveSPMDGroupManager.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.group.spmd;

import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;


public class ProActiveSPMDGroupManager implements java.io.Serializable {

    private Object spmdGroup = null;

    private HashMap currentBarriers = new HashMap(4); // initial capacity is 4.

    private LinkedList barrierTags = new LinkedList();

    public void setSPMDGroup(Object o) {
        this.spmdGroup = o;
    }

    public Object getSPMDGroup() {
        return this.spmdGroup;
    }

    public void addToBarrierTags(String barrierID) {
        if (!this.barrierTags.contains(barrierID)) {
            this.barrierTags.add(barrierID);
        }
    }

    public BarrierState getBarrierStateFor(String barrierName) {
        return (BarrierState) this.currentBarriers.get(barrierName);
    }

    public void setAwaitedBarrierCalls(String barrierName, int nbCalls) {
        BarrierState bs = (BarrierState) this.currentBarriers.get(barrierName);
        if (bs == null) {
            // System.out.println("First barrier \"" + this.getIDName() + "\" encountered !");
            // build and add infos about new barrier
            bs = new BarrierState();
            this.addToCurrentBarriers(barrierName, bs);
        }
        bs.setAwaitedCalls(nbCalls);
    }

    public void addToCurrentBarriers(String barrierName, BarrierState bs) {
        this.currentBarriers.put(barrierName, bs);
    }

    public void remove(String barrierName) {
        // stop tagging the outgoing message
        this.barrierTags.remove(barrierName);
        // remove the barrier from the current active barriers list
        this.currentBarriers.remove(barrierName);
    }

    public boolean isTagsListEmpty() {
        return (this.barrierTags.size() == 0);
    }

    public LinkedList getBarrierTags() {
        return this.barrierTags;
    }

    public boolean checkExecution(LinkedList barrierTags) {
        if (barrierTags == null) {
            return true;
        }
        Iterator it = barrierTags.iterator();
        while (it.hasNext()) {
            if (this.currentBarriers.get((String) it.next()) != null) {
                return false;
            }
        }
        return true;
    }

    public boolean isCurrentBarriersEmpty() {
        return (this.currentBarriers.size() == 0);
    }
}

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