queueddata.java

High performance DB query

/*
 * @(#)$Id: QueuedData.java,v 1.3 2004/07/02 23:59:22 huebsch Exp $
 *
 * Copyright (c) 2001-2004 Regents of the University of California.
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached BERKELEY-LICENSE
 * file. If you do not find these files, copies can be found by writing to:
 * Computer Science Division, Database Group, Universite of California,
 * 617 Soda Hall #1776, Berkeley, CA 94720-1776. Attention: Berkeley License
 *
 * Copyright (c) 2003-2004 Intel Corporation. All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE file.
 * If you do not find these files, copies can be found by writing to:
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300,
 * Berkeley, CA, 94704.  Attention:  Intel License Inquiry.
 */


package runtime.services.network.udp;

import java.net.InetSocketAddress;
import services.network.Payload;
import util.FreeList;
import util.FreeListFactory;

/**
 * Class QueuedData
 *
 */
public class QueuedData {

    protected Payload data;
    protected InetSocketAddress source;
    protected InetSocketAddress destination;
    private static FreeList freeList = new FreeList(new QueuedDataFactory());

    /**
     * Constructor QueuedData
     */
    protected QueuedData() {}

    /**
     * Method init
     *
     * @param data
     * @param source
     * @param destination
     */
    protected void init(Payload data, InetSocketAddress source,
                        InetSocketAddress destination) {
        this.data = data;
        this.destination = destination;
    }

    /**
     * Method getData
     * @return
     */
    public Payload getData() {
        return data;
    }

    /**
     * Method getSource
     * @return
     */
    public InetSocketAddress getSource() {
        return source;
    }

    /**
     * Method getDestination
     * @return
     */
    public InetSocketAddress getDestination() {
        return destination;
    }

    /**
     * Method allocate
     *
     * @param data
     * @param source
     * @param destination
     * @return
     */
    public static QueuedData allocate(Payload data, InetSocketAddress source,
                                      InetSocketAddress destination) {
        QueuedData object;

        synchronized (freeList) {
            object = (QueuedData) freeList.allocate();
        }

        object.init(data, source, destination);

        return object;
    }

    /**
     * Method free
     *
     * @param object
     */
    public static void free(QueuedData object) {
        synchronized (freeList) {
            freeList.free(object);
        }
    }
}


/**
 * Class QueuedDataFactory
 *
 */
class QueuedDataFactory implements FreeListFactory {

    /**
     * Method create
     * @return
     */
    public Object create() {
        return new QueuedData();
    }
}