simudpdatamessage.java

High performance DB query

/*
 * @(#)$Id: SimUDPDataMessage.java,v 1.9 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 SimUDPDataMessage
 *
 */
public class SimUDPDataMessage implements Payload {

    public static long serialVersionUID =
        SerializationManager.getSerialUID(
            "simulator.services.network.udp.SimUDPDataMessage");
    protected static final int UDP_MTU = 1480;
    protected static final int UDP_OVERHEAD = 8;
    protected static final int UDP_ACKOVERHEAD = 8;
    private Integer sourcePortNumber;
    private Integer destinationPortNumber;
    private Payload data;
    private Object ackData;
    private double sendTime;
    private static FreeList freeList =
        new FreeList(new SimUDPDataMessageFactory());

    /**
     * DeSerialize the object from the provided GenericByteBuffer.
     *
     * @param inputBuffer
     */
    public SimUDPDataMessage(GenericByteBuffer inputBuffer) {
        this.sourcePortNumber = new Integer(inputBuffer.getInt());
        this.destinationPortNumber = new Integer(inputBuffer.getInt());
        this.data = SerializationManager.deSerialize(inputBuffer);
    }

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

        return serialVersionUID;
    }

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

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

    /**
     * Method getSourcePortNumber
     * @return
     */
    public Integer getSourcePortNumber() {
        return sourcePortNumber;
    }

    /**
     * Method getDestinationPortNumber
     * @return
     */
    public Integer getDestinationPortNumber() {
        return destinationPortNumber;
    }

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

    /**
     * Method getAckData
     * @return
     */
    public Object getAckData() {
        return ackData;
    }

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

    /**
     * Method getSize
     * @return
     */
    public int getSize() {
        int size = (ackData == null)
                   ? 0
                   : UDP_ACKOVERHEAD;
        int dataSize = SerializationManager.getPayloadSize(data);
        int numPackets = dataSize / (UDP_MTU - UDP_OVERHEAD);

        return size + dataSize + (numPackets * UDP_OVERHEAD);
    }

    /**
     * Method toString
     * @return
     */
    public String toString() {
        return "<UDP: SP:" + sourcePortNumber + ", DP:" + destinationPortNumber
               + ", DA:" + data + ">";
    }

    /**
     * Method allocate
     *
     * @param sourcePortNumber
     * @param destinationPortNumber
     * @param data
     * @param ackData
     * @param sendTime
     * @return
     */
    public static SimUDPDataMessage allocate(Integer sourcePortNumber,
                                             Integer destinationPortNumber,
                                             Payload data, Object ackData,
                                             double sendTime) {
        SimUDPDataMessage message = (SimUDPDataMessage) freeList.allocate();

        message.init(sourcePortNumber, destinationPortNumber, data, ackData,
                     sendTime);

        return message;
    }

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


/**
 * Class SimUDPDataMessageFactory
 *
 */
class SimUDPDataMessageFactory implements FreeListFactory {

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