networksimulator.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 in binary form must reproduce the above copyright
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- Neither  the name  of Rice  University (RICE) nor  the names  of its
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This software is provided by RICE and the contributors on an "as is"
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********************************************************************************/
package rice.pastry.direct;

import rice.environment.Environment;
import rice.p2p.commonapi.CancellableTask;
import rice.pastry.*;
import rice.pastry.messaging.*;

/**
 * Interface to an object which is simulating the network.
 *
 * @version $Id: NetworkSimulator.java 3274 2006-05-15 16:17:47Z jeffh $
 * @author Andrew Ladd
 */

public interface NetworkSimulator {

  /**
   * Gets the Environment attribute of the NetworkSimulator object
   *
   * @return The Environment value
   */
  public Environment getEnvironment();

  /**
   * Registers a node handle with the simulator.
   *
   * @param dpn DESCRIBE THE PARAMETER
   */
  public void registerNode(DirectPastryNode dpn);

  /**
   * Checks to see if a node id is alive.
   *
   * @param nh DESCRIBE THE PARAMETER
   * @return true if alive, false otherwise.
   */

  public boolean isAlive(DirectNodeHandle nh);

  /**
   * Determines proximity between two nodes.
   *
   * @param a a node id.
   * @param b another node id.
   * @return proximity of b to a.
   */

  public int proximity(DirectNodeHandle a, DirectNodeHandle b);

  /**
   * Deliver message.
   *
   * @param msg message to deliver.
   * @param node the Pastry node to deliver it to.
   * @param delay DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public ScheduledMessage deliverMessage(Message msg, DirectPastryNode node, int delay);

  /**
   * Deliver message.
   *
   * @param msg message to deliver.
   * @param node the Pastry node to deliver it to.
   * @param period to deliver the message after the delay
   * @param delay DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public ScheduledMessage deliverMessage(Message msg, DirectPastryNode node, int delay, int period);

  /**
   * Deliver message.
   *
   * @param msg message to deliver.
   * @param node the Pastry node to deliver it to.
   * @param period to deliver the message after the delay
   * @param delay DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public ScheduledMessage deliverMessageFixedRate(Message msg, DirectPastryNode node, int delay, int period);

  /**
   * Deliver message ASAP.
   *
   * @param msg message to deliver.
   * @param node the Pastry node to deliver it to.
   * @return DESCRIBE THE RETURN VALUE
   */
  public ScheduledMessage deliverMessage(Message msg, DirectPastryNode node);

  /**
   * Sets the TestRecord attribute of the NetworkSimulator object
   *
   * @param tr The new TestRecord value
   */
  public void setTestRecord(TestRecord tr);

  /**
   * Gets the TestRecord attribute of the NetworkSimulator object
   *
   * @return The TestRecord value
   */
  public TestRecord getTestRecord();

  /**
   * Returns the closest Node in proximity.
   *
   * @param nh DESCRIBE THE PARAMETER
   * @return
   */
  public DirectNodeHandle getClosest(DirectNodeHandle nh);

  /**
   * DESCRIBE THE METHOD
   *
   * @param dpn DESCRIBE THE PARAMETER
   */
  public void destroy(DirectPastryNode dpn);

  /**
   * Generates a random node record
   *
   * @return
   */
  public NodeRecord generateNodeRecord();

  /**
   * DESCRIBE THE METHOD
   *
   * @param node DESCRIBE THE PARAMETER
   */
  public void removeNode(DirectPastryNode node);

  /**
   * DESCRIBE THE METHOD
   */
  public void start();

  /**
   * DESCRIBE THE METHOD
   */
  public void stop();

  /**
   * Deliver message.
   *
   * @param del DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public CancellableTask enqueueDelivery(Delivery del);
}