simudpackmessage.java

来自「High performance DB query」· Java 代码 · 共 153 行

/*
 * @(#)$Id: SimUDPAckMessage.java,v 1.6 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 simulator.services.network.udp;

import services.network.Payload;
import util.FreeList;
import util.FreeListFactory;
import util.network.serialization.GenericByteBuffer;
import util.network.serialization.SerializationManager;

/**
 * Class SimUDPAckMessage
 *
 */
public class SimUDPAckMessage implements Payload {

    public static long serialVersionUID =
        SerializationManager.getSerialUID(
            "simulator.services.network.udp.SimUDPAckMessage");
    private Payload data;
    private double sendTime;
    private static FreeList freeList =
        new FreeList(new SimUDPAckMessageFactory());

    /**
     * DeSerialize the object from the provided GenericByteBuffer.
     *
     * @param inputBuffer
     */
    public SimUDPAckMessage(GenericByteBuffer inputBuffer) {
        this.data = SerializationManager.deSerialize(inputBuffer);
    }

    /**
     * Serialize the object into the provided GenericByteBuffer.
     *
     * @param outputBuffer
     * @return
     */
    public long serialize(GenericByteBuffer outputBuffer) {
        SerializationManager.serialize(outputBuffer, data);

        return serialVersionUID;
    }

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

    /**
     * Method init
     *
     * @param data
     * @param sendTime
     */
    public void init(Payload data, double sendTime) {
        this.data = data;
        this.sendTime = sendTime;
    }

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

    /**
     * Method getSendTime
     * @return
     */
    public double getSendTime() {
        return sendTime;
    }

    /**
     * Method getSize
     * @return
     */
    public int getSize() {
        return SimUDPDataMessage.UDP_ACKOVERHEAD
               + SimUDPDataMessage.UDP_OVERHEAD;
    }

    /**
     * Method toString
     * @return
     */
    public String toString() {
        return "<UDPACK: DA:" + data + ">";
    }

    /**
     * Method allocate
     *
     * @param data
     * @param sendTime
     * @return
     */
    public static SimUDPAckMessage allocate(Payload data, double sendTime) {
        SimUDPAckMessage message = (SimUDPAckMessage) freeList.allocate();

        message.init(data, sendTime);

        return message;
    }

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


/**
 * Class SimUDPAckMessageFactory
 *
 */
class SimUDPAckMessageFactory implements FreeListFactory {

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