/* * Copyright 1999-2012 Alibaba Group. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.alibaba.dubbo.cache.support.lru; import java.util.LinkedHashMap; import java.util.Map; import java.util.Map.Entry; import com.alibaba.dubbo.cache.Cache; import com.alibaba.dubbo.common.URL; /** * LruCache * * @author william.liangf */ public class LruCache implements Cache { private final Map<Object, Object> store; public LruCache(URL url) { final int max = url.getParameter("cache.size", 1000); this.store = new LinkedHashMap<Object, Object>() { private static final long serialVersionUID = -3834209229668463829L; @Override protected boolean removeEldestEntry(Entry<Object, Object> eldest) { return size() > max; } }; } public void put(Object key, Object value) { synchronized (store) { store.put(key, value); } } public Object get(Object key) { synchronized (store) { return store.get(key); } } }