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 */
017package org.apache.activemq.memory;
018
019import java.util.Map;
020
021import 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 */
029public 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}