001    /*
002     * Copyright 2010 the original author or authors.
003     * 
004     *  Licensed under the Apache License, Version 2.0 (the "License");
005     *  you may not use this file except in compliance with the License.
006     *  You may obtain a copy of the License at
007     *
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     *
010     *  Unless required by applicable law or agreed to in writing, software
011     *  distributed under the License is distributed on an "AS IS" BASIS,
012     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     *  See the License for the specific language governing permissions and
014     *  limitations under the License.
015     */
016    package com.hs.mail.util;
017    
018    import java.util.List;
019    
020    import net.sf.ehcache.Ehcache;
021    import net.sf.ehcache.Element;
022    
023    public class EhCacheWrapper<K, V> implements CacheWrapper<K, V> {
024    
025            private Ehcache cache;
026    
027            public EhCacheWrapper(Ehcache cache) {
028                    this.cache = cache;
029            }
030    
031            @SuppressWarnings("unchecked")
032            public V get(K key) {
033                    Element element = getCache().get(key);
034                    if (element != null) {
035                            return (V) element.getObjectValue();
036                    }
037                    return null;
038            }
039    
040            public void put(K key, V value) {
041                    getCache().put(new Element(key, value));
042            }
043            
044            public boolean remove(K key) {
045                    return getCache().remove(key);
046            }
047    
048            public Ehcache getCache() {
049                    return cache;
050            }
051    
052            public int remove(List<K> keys) {
053                    int evicted = 0;
054                    if (keys != null) {
055                            for (K key : keys) {
056                                    if (remove(key)) {
057                                            evicted++;
058                                    }
059                            }
060                    }
061                    return evicted;
062            }
063            
064            public static void flush(EhCacheWrapper<?, ?> wrapper) {
065                    if (wrapper != null) {
066                            wrapper.getCache().flush();
067                    }
068            }
069    
070    }