001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.commons.jcs.jcache.jmx;
020
021import org.apache.commons.jcs.jcache.Statistics;
022
023import javax.cache.management.CacheStatisticsMXBean;
024
025public class JCSCacheStatisticsMXBean implements CacheStatisticsMXBean
026{
027    private final Statistics statistics;
028
029    public JCSCacheStatisticsMXBean(final Statistics stats)
030    {
031        this.statistics = stats;
032    }
033
034    @Override
035    public void clear()
036    {
037        statistics.reset();
038    }
039
040    @Override
041    public long getCacheHits()
042    {
043        return statistics.getHits();
044    }
045
046    @Override
047    public float getCacheHitPercentage()
048    {
049        final long hits = getCacheHits();
050        if (hits == 0)
051        {
052            return 0;
053        }
054        return (float) hits / getCacheGets() * 100.0f;
055    }
056
057    @Override
058    public long getCacheMisses()
059    {
060        return statistics.getMisses();
061    }
062
063    @Override
064    public float getCacheMissPercentage()
065    {
066        final long misses = getCacheMisses();
067        if (misses == 0)
068        {
069            return 0;
070        }
071        return (float) misses / getCacheGets() * 100.0f;
072    }
073
074    @Override
075    public long getCacheGets()
076    {
077        return getCacheHits() + getCacheMisses();
078    }
079
080    @Override
081    public long getCachePuts()
082    {
083        return statistics.getPuts();
084    }
085
086    @Override
087    public long getCacheRemovals()
088    {
089        return statistics.getRemovals();
090    }
091
092    @Override
093    public long getCacheEvictions()
094    {
095        return statistics.getEvictions();
096    }
097
098    @Override
099    public float getAverageGetTime()
100    {
101        return averageTime(statistics.getTimeTakenForGets());
102    }
103
104    @Override
105    public float getAveragePutTime()
106    {
107        return averageTime(statistics.getTimeTakenForPuts());
108    }
109
110    @Override
111    public float getAverageRemoveTime()
112    {
113        return averageTime(statistics.getTimeTakenForRemovals());
114    }
115
116    private float averageTime(final long timeTaken)
117    {
118        final long gets = getCacheGets();
119        if (timeTaken == 0 || gets == 0)
120        {
121            return 0;
122        }
123        return timeTaken / gets;
124    }
125}