glacierpolicy.java

pastry的java实现的2.0b版

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

"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
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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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- Neither  the name  of Rice  University (RICE) nor  the names  of its
contributors may be  used to endorse or promote  products derived from
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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.p2p.glacier.v2;

import rice.p2p.commonapi.*;
import rice.p2p.glacier.*;
import rice.p2p.past.PastContent;
import rice.p2p.past.rawserialization.PastContentDeserializer;
import rice.Continuation;

/**
 * DESCRIBE THE INTERFACE
 *
 * @version $Id: pretty.settings 2305 2005-03-11 20:22:33Z jeffh $
 * @author jeffh
 */
public interface GlacierPolicy {

  /**
   * DESCRIBE THE METHOD
   *
   * @param manifest DESCRIBE THE PARAMETER
   * @param key DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public boolean checkSignature(Manifest manifest, VersionKey key);

  /**
   * DESCRIBE THE METHOD
   *
   * @param obj DESCRIBE THE PARAMETER
   * @param generateFragment DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public Fragment[] encodeObject(PastContent obj, boolean[] generateFragment);

  /**
   * DESCRIBE THE METHOD
   *
   * @param key DESCRIBE THE PARAMETER
   * @param obj DESCRIBE THE PARAMETER
   * @param fragments DESCRIBE THE PARAMETER
   * @param expiration DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public Manifest[] createManifests(VersionKey key, PastContent obj, Fragment[] fragments, long expiration);

  /**
   * DESCRIBE THE METHOD
   *
   * @param key DESCRIBE THE PARAMETER
   * @param manifest DESCRIBE THE PARAMETER
   * @param newExpiration DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public Manifest updateManifest(VersionKey key, Manifest manifest, long newExpiration);

  /**
   * DESCRIBE THE METHOD
   *
   * @param fragments DESCRIBE THE PARAMETER
   * @param endpoint DESCRIBE THE PARAMETER
   * @param pcd DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public PastContent decodeObject(Fragment[] fragments, Endpoint endpoint, PastContentDeserializer pcd);

  /**
   * DESCRIBE THE METHOD
   *
   * @param key DESCRIBE THE PARAMETER
   * @param command DESCRIBE THE PARAMETER
   */
  public void prefetchLocalObject(VersionKey key, Continuation command);

}