pingevent.java

Java p2p程序设计2002年版

package net.jxta.impl.shell.bin.ping;

import java.util.*;

/**
 * Provided to PingReplyListeners when a ping reply is received by
 * a PingReplyHandler. This represents the initial ping leg and not
 * the reply.
 *
 * This event object holds two timestamps. One representing the sending
 * time and one representing the receving time. Plus the differential
 * time.
 *
 */
public class PingEvent extends java.util.EventObject {
    
    //timestamp of ping arrival
    long timestamp = 0;
    
    // name of peer who sent this message
    String name = "";
    
    // timestamp when ping left
    long ostamp = 0;
    
    /** Creates new PingEvent */
    public PingEvent(Object source, String name, long ot, long t) {
        super(source);
        this.name = name;
        this.ostamp = ot;
        this.timestamp = t;
    }
    
    /**
     * @return This method returns the timestamp of the origin of the ping
     * message, which is to say, the ping sender.
     */
    public long getOriginTimestamp() {
        return ostamp;
    }
    
    /**
     * @return Returns the timestamp when the ping message was received.
     */
    public long getTimestamp() {
        return timestamp;
    }

    /**
     * @return The name of the peer who sent the ping message
     */
    public String getPeerName() {
        return name;
    }
    
    /**
     * @return Returns the time differential between the sender
     * and receiver of this leg of a ping.
     */
    public long getDifferential() {
        return timestamp-ostamp;
    }
}