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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You 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 org.apache.geode.internal.cache.lru;

import org.apache.geode.*;
// import org.apache.geode.internal.*;

/**
 * Statistics for the HeapLRUCapacityController, which treats the counter statistic differently than
 * other flavors of LRUAlgorithms
 *
 * @see org.apache.geode.internal.cache.lru.MemLRUCapacityController
 * @see org.apache.geode.internal.cache.lru.LRUCapacityController
 * @since GemFire 4.0
 */
public class HeapLRUStatistics extends LRUStatistics {

  public HeapLRUStatistics(StatisticsFactory factory, String name, EnableLRU helper) {
    super(factory, name, helper);
  }

  /**
   * Ignore the delta value since the change isn't relevant for heap related LRU since the counter
   * reflects a percentage of used memory. Normally the delta reflects either the number of entries
   * that changed for the LRUCapacityController or the estimated amount of memory that
   * has changed after performing a Region operation. The HeapLRUCapacityController
   * however does not care about Region changes, it only considers heap changes and
   * uses Runtime to determine how much to evict.
   * 
   * @see org.apache.geode.internal.cache.lru.HeapLRUCapacityController#createLRUHelper
   * @see EnableLRU#mustEvict
   */
  @Override
  final public void updateCounter(long delta) {
    super.updateCounter(delta);
  }

  /**
   * The counter for HeapLRUCapacityController reflects in use heap. Since you can not
   * programatically reset the amount of heap usage (at least not directly) this method does
   * NOT reset the counter value.
   */
  @Override
  final public void resetCounter() {
    super.resetCounter();
  }
}