/*
    * 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.commons.jcs.jcache.jmx;
  
  import org.apache.commons.jcs.jcache.Statistics;
  
  import javax.cache.management.CacheStatisticsMXBean;
  
  public class JCSCacheStatisticsMXBean implements CacheStatisticsMXBean
  {
      private final Statistics statistics;
  
      public JCSCacheStatisticsMXBean(final Statistics stats)
      {
          this.statistics = stats;
      }
  
      @Override
      public void clear()
      {
          statistics.reset();
      }
  
      @Override
      public long getCacheHits()
      {
          return statistics.getHits();
      }
  
      @Override
      public float getCacheHitPercentage()
      {
          final long hits = getCacheHits();
          if (hits == 0)
          {
              return 0;
          }
          return (float) hits / getCacheGets() * 100.0f;
      }
  
      @Override
      public long getCacheMisses()
      {
          return statistics.getMisses();
      }
  
      @Override
      public float getCacheMissPercentage()
      {
          final long misses = getCacheMisses();
          if (misses == 0)
          {
              return 0;
          }
          return (float) misses / getCacheGets() * 100.0f;
      }
  
      @Override
      public long getCacheGets()
      {
          return getCacheHits() + getCacheMisses();
      }
  
      @Override
      public long getCachePuts()
      {
          return statistics.getPuts();
      }
  
      @Override
      public long getCacheRemovals()
      {
          return statistics.getRemovals();
      }
  
      @Override
      public long getCacheEvictions()
      {
          return statistics.getEvictions();
      }
  
      @Override
      public float getAverageGetTime()
     {
         return averageTime(statistics.getTimeTakenForGets());
     }
 
     @Override
     public float getAveragePutTime()
     {
         return averageTime(statistics.getTimeTakenForPuts());
     }
 
     @Override
     public float getAverageRemoveTime()
     {
         return averageTime(statistics.getTimeTakenForRemovals());
     }
 
     private float averageTime(final long timeTaken)
     {
         final long gets = getCacheGets();
         if (timeTaken == 0 || gets == 0)
         {
             return 0;
         }
         return timeTaken / gets;
     }
 }