ping.java

pastry的java实现的2.0b版

/*************************************************************************

"FreePastry" Peer-to-Peer Application Development Substrate 

Copyright 2002, Rice University. All rights reserved.

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- Redistributions of source code must retain the above copyright
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- Redistributions in binary form must reproduce the above copyright
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documentation and/or other materials provided with the distribution.

- Neither  the name  of Rice  University (RICE) nor  the names  of its
contributors may be  used to endorse or promote  products derived from
this software without specific prior written permission.

This software is provided by RICE and the contributors on an "as is"
basis, without any representations or warranties of any kind, express
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********************************************************************************/
package rice.pastry.testing;

import rice.pastry.*;
import rice.pastry.client.*;
import rice.pastry.routing.*;
import rice.pastry.messaging.*;
import rice.pastry.direct.*;

import java.util.*;

/**
 * Ping A performance test suite for pastry. This is the per-node app object.
 *
 * @version $Id: Ping.java 3274 2006-05-15 16:17:47Z jeffh $
 * @author Rongmei Zhang
 */

public class Ping extends PastryAppl {
  private static int pingAddress = PingAddress.getCode();

  /**
   * Constructor for Ping.
   *
   * @param pn DESCRIBE THE PARAMETER
   */
  public Ping(PastryNode pn) {
    super(pn);
  }

  /**
   * Gets the Address attribute of the Ping object
   *
   * @return The Address value
   */
  public int getAddress() {
    return pingAddress;
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @param nid DESCRIBE THE PARAMETER
   */
  public void sendPing(Id nid) {
    routeMsg(nid, new PingMessageNew(pingAddress, getNodeHandle(), nid),
      new SendOptions());
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @param msg DESCRIBE THE PARAMETER
   */
  public void messageForAppl(Message msg) {

    PingMessageNew pMsg = (PingMessageNew) msg;
    int nHops = pMsg.getHops() - 1;
    double fDistance = pMsg.getDistance();
    double rDistance;

    NetworkSimulator sim = ((DirectNodeHandle) ((DirectPastryNode) thePastryNode)
      .getLocalHandle()).getSimulator();
    PingTestRecord tr = (PingTestRecord) (sim.getTestRecord());

    double dDistance = sim.proximity((DirectNodeHandle) thePastryNode.getLocalHandle(), (DirectNodeHandle) pMsg.getSender());
    if (dDistance == 0) {
      rDistance = 0;
    } else {
      rDistance = fDistance / dDistance;
    }
    tr.addHops(nHops);
    tr.addDistance(rDistance);

  }

  /**
   * DESCRIBE THE METHOD
   *
   * @param msg DESCRIBE THE PARAMETER
   * @param from DESCRIBE THE PARAMETER
   * @param nextHop DESCRIBE THE PARAMETER
   * @param opt DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public boolean enrouteMessage(Message msg, Id from, NodeHandle nextHop,
                                SendOptions opt) {

    PingMessageNew pMsg = (PingMessageNew) msg;
    pMsg.incrHops();
    pMsg.incrDistance(((DirectNodeHandle) ((DirectPastryNode) thePastryNode)
      .getLocalHandle()).getSimulator().proximity(
      (DirectNodeHandle) thePastryNode.getLocalHandle(),
      (DirectNodeHandle) nextHop));

    return true;
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @param nh DESCRIBE THE PARAMETER
   * @param wasAdded DESCRIBE THE PARAMETER
   */
  public void leafSetChange(NodeHandle nh, boolean wasAdded) {
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @param nh DESCRIBE THE PARAMETER
   * @param wasAdded DESCRIBE THE PARAMETER
   */
  public void routeSetChange(NodeHandle nh, boolean wasAdded) {
  }
}