prioritypacket.java

银行项目为后台ｓｏｃｋｅｔ通信写的程序

/****************************************************************************
 * Package		: com.ecSolutions.ecAppServer.server.filter
 * File			: PriorityPacket.java
 * Create Date  : 2007-7-20
 * Author		: Steven Chen
 * 
 * Copyright(C) 2006 ecSolutions(shanghai) Co.,Limited.All Rights Reserved.
 *			
 ***************************************************************************/
package com.ecSolutions.ecAppServer.server.packet;

import com.ecSolutions.ecAppServer.server.Packet;
import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicLong;

/**
 * Implementation of <code>Packet</code>, compared by priority and create
 * time.
 * 
 * @author Steven Chen
 * @version $Id: PriorityPacket.java,v 1.2 2007/07/26 03:29:53 stevenchen Exp $
 */
public class PriorityPacket extends DelegatePacket implements Comparable {

    private static final AtomicLong TIMESTAMP = new AtomicLong();

    private final int priority;
    private final long createTime;

    public PriorityPacket(Packet packet, int priority) {
        super(packet);
        this.priority = priority;
        createTime = TIMESTAMP.getAndIncrement();
    }

    public int compareTo(Object obj) {
        PriorityPacket packet = (PriorityPacket) obj;
        int sp = packet.priority;
        return priority < sp ? -1 : (priority > sp ? 1
                : (int) (createTime - packet.createTime));
    }

    public String toString() {
        return super.toString() + " [priority] " + priority;
    }
}