001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.activemq.memory;
018    
019    import java.util.Map;
020    
021    import java.util.concurrent.ConcurrentHashMap;
022    
023    /**
024     * Use any Map to implement the Cache.  No cache eviction going on here.  Just gives
025     * a Map a Cache interface.
026     * 
027     * 
028     */
029    public class MapCache implements Cache {
030        
031        protected final Map<Object, Object> map;
032        
033        public MapCache() {
034            this(new ConcurrentHashMap<Object, Object>());
035        }
036        
037        public MapCache(Map<Object, Object> map) {
038            this.map = map;
039        }
040    
041        public Object put(Object key, Object value) {
042            return map.put(key, value);
043        }
044    
045        public Object get(Object key) {
046            return map.get(key);
047        }
048    
049        public Object remove(Object key) {
050            return map.remove(key);
051        }
052        
053        public void close() {
054            map.clear();
055        }
056    
057        public int size() {
058            return map.size();
059        }
060    }