/*

  * Copyright 2001-2004 The Apache Software Foundation

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.apache.commons.cache;

 import java.io.Serializable;

 /**

  * tk.

  * @version $Id: RetrievalListener.java 155435 2005-02-26 13:17:27Z dirkv $

  * @author Rodney Waldhoff

  */

 public interface RetrievalListener extends Serializable {

   public void retrieveRequested(Serializable key);

   public void retrieved(Serializable key);

   public void notRetrieved(Serializable key);

   /*

   public void activate();

   public void passivate();

   */

 }