/*
* 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 <code>LRUAlgorithms</code>
*
* @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 <code>LRUCapacityController</code> or the estimated amount of memory that
* has changed after performing a Region operation. The <code>HeapLRUCapacityController</code>
* however does not care about <code>Region</code> changes, it only considers heap changes and
* uses <code>Runtime</code> 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 <code>HeapLRUCapacityController</code> reflects in use heap. Since you can not
* programatically reset the amount of heap usage (at least not directly) this method does
* <b>NOT</b> reset the counter value.
*/
@Override
final public void resetCounter() {
super.resetCounter();
}
}