001/* 002 * Copyright 2019 Anyware Services 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.ametys.plugins.core.impl.cache; 018 019import org.ametys.core.cache.CacheStats; 020 021/** 022 * Guava implementation of CacheStats 023 */ 024public class GuavaCacheStats implements CacheStats 025{ 026 private com.google.common.cache.CacheStats _cacheStats; 027 028 /** 029 * GuavaCacheStats implementation of CacheStats 030 */ 031 public GuavaCacheStats() 032 { 033 this._cacheStats = new com.google.common.cache.CacheStats(0, 0, 0, 0, 0, 0); 034 } 035 036 /** 037 * GuavaCacheStats implementation of CacheStats 038 * @param cacheStats stats of Guava cache 039 */ 040 public GuavaCacheStats(com.google.common.cache.CacheStats cacheStats) 041 { 042 this._cacheStats = cacheStats; 043 } 044 045 public long requestCount() 046 { 047 return _cacheStats.requestCount(); 048 } 049 050 public long hitCount() 051 { 052 return _cacheStats.hitCount(); 053 } 054 055 public double hitRate() 056 { 057 return _cacheStats.hitRate(); 058 } 059 060 public long missCount() 061 { 062 return _cacheStats.missCount(); 063 } 064 065 public double missRate() 066 { 067 return _cacheStats.missRate(); 068 } 069 070 public long evictionCount() 071 { 072 return _cacheStats.evictionCount(); 073 } 074 075 public double evictionRate() 076 { 077 long requestCount = requestCount(); 078 return (requestCount == 0) ? 0.0 : (double) evictionCount() / requestCount; 079 } 080 081 public CacheStats minus(CacheStats cacheStats) 082 { 083 com.google.common.cache.CacheStats guavaCacheStats = new com.google.common.cache.CacheStats(cacheStats.hitCount(), cacheStats.missCount(), cacheStats.missCount(), 0, 0, cacheStats.evictionCount()); 084 return new GuavaCacheStats(_cacheStats.minus(guavaCacheStats)); 085 } 086 087 public CacheStats plus(CacheStats cacheStats) 088 { 089 com.google.common.cache.CacheStats guavaCacheStats = new com.google.common.cache.CacheStats(cacheStats.hitCount(), cacheStats.missCount(), cacheStats.missCount(), 0, 0, cacheStats.evictionCount()); 090 return new GuavaCacheStats(_cacheStats.plus(guavaCacheStats)); 091 } 092}