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 }