content: /**
   * Copyright 1999-2011 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.cobar.client.support;
  
  import java.util.LinkedHashMap;
  
  public class LRUMap<K, V> extends LinkedHashMap<K, V> {
  
      private static final long serialVersionUID = -3700466745992492679L;
  
      private int               coreSize;
  
      public LRUMap(int coreSize) {
          super(coreSize + 1, 1.1f, true);
          this.coreSize = coreSize;
      }
  
      @Override
      protected boolean removeEldestEntry(java.util.Map.Entry<K, V> eldest) {
          return size() > coreSize;
      }
  }
  