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 }