1 /*
2 * Copyright 2006-2008 The Kuali Foundation
3 *
4 * Licensed under the Educational Community License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.opensource.org/licenses/ecl2.php
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.kuali.rice.kns.util;
17
18 import org.apache.commons.collections.map.LRUMap;
19 import org.apache.log4j.Logger;
20 import org.kuali.rice.kns.service.impl.SessionDocumentServiceImpl;
21
22 /**
23 * Override LRUMap removeEntity method
24 *
25 *
26 */
27 public class KualiLRUMap extends LRUMap {
28
29 /** Serialization version */
30 private static final long serialVersionUID = 1L;
31
32 public KualiLRUMap() {
33 super();
34 }
35
36 public KualiLRUMap(int maxSize) {
37 super(maxSize);
38 }
39
40 protected void removeEntry(HashEntry entry, int hashIndex, HashEntry previous) {
41
42 // It is for session document cache enhancement.
43 // To control the size of cache. When the LRUMap reach the maxsize.
44 // It will remove session document entries from the in-memory user
45 // session objects.
46 try {
47 SessionDocumentServiceImpl.CachedObject cachedObject
48 = (SessionDocumentServiceImpl.CachedObject)this.entryValue(entry);
49 cachedObject.getUserSession().removeObject(cachedObject.getFormKey());
50 } catch (Exception ex) {
51 Logger.getLogger(getClass()).warn( "Problem purging old entry from the user session when removing from the map: ", ex);
52 }
53
54 super.removeEntry(entry, hashIndex, previous);
55 }
56
57 }