1 /*
2 * Copyright (c) 2002-2014, Mairie de Paris
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice
10 * and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice
13 * and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * 3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 * License 1.0
33 */
34 package fr.paris.lutece.portal.service.page;
35
36 import fr.paris.lutece.portal.service.cache.AbstractCacheableService;
37
38 import net.sf.ehcache.Ehcache;
39 import net.sf.ehcache.Element;
40
41 import java.util.concurrent.ConcurrentHashMap;
42
43
44 /**
45 * Page Cache Service
46 */
47 public class PageCacheService extends AbstractCacheableService
48 {
49 private static final String SERVICE_NAME = "Page Cache Service";
50
51 // Performance patch
52 private static ConcurrentHashMap<String, String> _keyMemory = new ConcurrentHashMap<String, String>( );
53
54 /**
55 * {@inheritDoc }
56 */
57 public String getName( )
58 {
59 return SERVICE_NAME;
60 }
61
62 /**
63 * Get a memory key
64 * @param strKey The key
65 * @return The key
66 */
67 String getKey( String strKey )
68 {
69 String keyInMemory = _keyMemory.putIfAbsent( strKey, strKey );
70
71 if ( keyInMemory != null )
72 {
73 return keyInMemory;
74 }
75
76 return strKey;
77 }
78
79 /**
80 * @see net.sf.ehcache.event.CacheEventListener#notifyElementEvicted(net.sf.ehcache.Ehcache,
81 * net.sf.ehcache.Element)
82 * @param cache The Ehcache object
83 * @param element The Element object
84 */
85 @Override
86 public void notifyElementEvicted( Ehcache cache, Element element )
87 {
88 removeKeyFromMap( element );
89 }
90
91 /**
92 * @see net.sf.ehcache.event.CacheEventListener#notifyElementExpired(net.sf.ehcache.Ehcache,
93 * net.sf.ehcache.Element)
94 * @param cache The Ehcache object
95 * @param element The Element object
96 */
97 @Override
98 public void notifyElementExpired( Ehcache cache, Element element )
99 {
100 removeKeyFromMap( element );
101 }
102
103 /**
104 * @see net.sf.ehcache.event.CacheEventListener#notifyElementRemoved(net.sf.ehcache.Ehcache,
105 * net.sf.ehcache.Element)
106 * @param cache The Ehcache object
107 * @param element The Element object
108 */
109 @Override
110 public void notifyElementRemoved( Ehcache cache, Element element )
111 {
112 removeKeyFromMap( element );
113 }
114
115 /**
116 * @see net.sf.ehcache.event.CacheEventListener#notifyRemoveAll(net.sf.ehcache.Ehcache)
117 * @param cache The Ehcache object
118 */
119 @Override
120 public void notifyRemoveAll( Ehcache cache )
121 {
122 _keyMemory.clear( );
123 }
124
125 /**
126 * @param element The Element object
127 */
128 public void removeKeyFromMap( Element element )
129 {
130 _keyMemory.remove( (String) element.getKey( ) );
131 }
132
133 /**
134 * @see java.lang.Object#clone()
135 * @return the instance
136 */
137 @Override
138 public Object clone( )
139 {
140 throw new RuntimeException( "This class shouldn't be cloned" );
141 }
142 }