pingentry.java

High performance DB query

/*
 * @(#)$Id: PingEntry.java,v 1.4 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 util.network.ping;

import java.net.InetSocketAddress;
import util.FreeList;
import util.FreeListFactory;

/**
 * Class PingEntry
 *
 */
public class PingEntry {

    private int sequenceNumber;
    private InetSocketAddress destination;
    private PingClient client;
    private static FreeList freeList = new FreeList(new PingEntryFactory());

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

    private void init(InetSocketAddress destination, PingClient client) {
        this.destination = destination;
        this.client = client;
    }

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

    /**
     * Method getClient
     * @return
     */
    public PingClient getClient() {
        return client;
    }

    /**
     * Method allocate
     *
     * @param destination
     * @param client
     * @return
     */
    public static PingEntry allocate(InetSocketAddress destination,
                                     PingClient client) {
        PingEntry theEntry = (PingEntry) freeList.allocate();

        theEntry.init(destination, client);

        return theEntry;
    }

    /**
     * Method free
     *
     * @param theItem
     */
    public static void free(PingEntry theItem) {
        freeList.free(theItem);
    }
}


/**
 * Class PingEntryFactory
 *
 */
class PingEntryFactory implements FreeListFactory {

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