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

"FreePastry" Peer-to-Peer Application Development Substrate 

Copyright 2002, Rice University. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
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
or implied including, but not limited to, representations or
warranties of non-infringement, merchantability or fitness for a
particular purpose. In no event shall RICE or contributors be liable
for any direct, indirect, incidental, special, exemplary, or
consequential damages (including, but not limited to, procurement of
substitute goods or services; loss of use, data, or profits; or
business interruption) however caused and on any theory of liability,
whether in contract, strict liability, or tort (including negligence
or otherwise) arising in any way out of the use of this software, even
if advised of the possibility of such damage.

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

package rice.p2p.past.gc.messaging;

import java.io.IOException;

import rice.*;
import rice.environment.Environment;
import rice.p2p.commonapi.*;
import rice.p2p.commonapi.rawserialization.*;
import rice.p2p.past.*;
import rice.p2p.past.messaging.*;

/**
 * @(#) GCCollectMessage.java This class represents a message which tells GC
 * Past that it's time to delete all the expired objects in the local store.
 *
 * @version $Id: GCCollectMessage.java 3274 2006-05-15 16:17:47Z jeffh $
 * @author Alan Mislove
 */
public class GCCollectMessage extends PastMessage {
  /**
   * DESCRIBE THE FIELD
   */
  public final static short TYPE = 8;

  /**
   * Constructor
   *
   * @param id The location to be stored
   * @param source The source address
   * @param dest The destination address
   */
  public GCCollectMessage(int id, NodeHandle source, Id dest) {
    super(id, source, dest);
  }

  /**
   * Gets the Type attribute of the GCCollectMessage object
   *
   * @return The Type value
   */
  public short getType() {
    return TYPE;
  }

  /**
   * Method by which this message is supposed to return it's response - in this
   * case, it lets the continuation know that a the message was lost via the
   * receiveException method.
   *
   * @param c The continuation to return the reponse to.
   * @param env DESCRIBE THE PARAMETER
   * @param instance DESCRIBE THE PARAMETER
   */
  public void returnResponse(Continuation c, Environment env, String instance) {
    c.receiveException(new PastException("Should not be called!"));
  }

  /**
   * Returns a string representation of this message
   *
   * @return A string representing this message
   */
  public String toString() {
    return "[GCCollectMessage]";
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @param buf DESCRIBE THE PARAMETER
   * @exception IOException DESCRIBE THE EXCEPTION
   */
  public void serialize(OutputBuffer buf) throws IOException {
    throw new RuntimeException("serialize() not supported in MessageLostMessage");
  }
}

