/*

  * Copyright 2006-2008 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  *

  * 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.kuali.rice.kns.util;

 import org.apache.commons.collections.map.LRUMap;

 import org.apache.log4j.Logger;

 import org.kuali.rice.kns.service.impl.SessionDocumentServiceImpl;

 /**

  * Override LRUMap removeEntity method

  * 

  * 

  */

 public class KualiLRUMap extends LRUMap {

         /** Serialization version */

         private static final long serialVersionUID = 1L;

         public KualiLRUMap() {

                 super();

         }

         public KualiLRUMap(int maxSize) {

                 super(maxSize);

         }

         protected void removeEntry(HashEntry entry, int hashIndex, HashEntry previous) {

                 // It is for session document cache enhancement.

                 // To control the size of cache. When the LRUMap reach the maxsize.

                 // It will remove session document entries from the in-memory user

                 // session objects.

                 try {

                         SessionDocumentServiceImpl.CachedObject cachedObject 

                                         = (SessionDocumentServiceImpl.CachedObject)this.entryValue(entry);

                         cachedObject.getUserSession().removeObject(cachedObject.getFormKey());

                 } catch (Exception ex) {

                         Logger.getLogger(getClass()).warn( "Problem purging old entry from the user session when removing from the map: ", ex);

                 }

                 super.removeEntry(entry, hashIndex, previous);

         }

 }