Examples of net.sf.ehcache.Statistics

net.sf.ehcache.Statistics
An immutable Cache statistics implementation}
This is like a value object, with the added ability to clear cache statistics on the cache. That ability does not survive any Serialization of this class. On deserialization the cache can be considered disconnected.
The accuracy of these statistics are determined by the value of {#getStatisticsAccuracy()} at the time the statistic was computed. This can be changed by setting {@link Cache#setStatisticsAccuracy}.
Because this class maintains a reference to an Ehcache, any references held to this class will precent the Ehcache from getting garbage collected.
The {@link #STATISTICS_ACCURACY_BEST_EFFORT}, {@link #STATISTICS_ACCURACY_GUARANTEED} and {@link #STATISTICS_ACCURACY_NONE}constants have the same values as in JSR107. @author Greg Luck @version $Id: Statistics.java 744 2008-08-16 20:10:49Z gregluck $


    if (cache != null) {
      System.out.printf(" cache= %s%n", cache.toString());
      System.out.printf(" cache.size= %d%n", cache.getSize());
      System.out.printf(" cache.memorySize= %d%n", cache.getMemoryStoreSize());
      Statistics stats = cache.getStatistics();
      System.out.printf(" stats= %s%n", stats.toString());
    }
  }

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      for (final String cacheName : this.cacheManager.getCacheNames()) {
          final Cache cache = this.cacheManager.getCache(cacheName);
          
          if (null != cache && Status.STATUS_ALIVE.equals(cache.getStatus())) {
              final CacheConfiguration cacheConfiguration = cache.getCacheConfiguration();
              final Statistics statistics = cache.getStatistics();
              
              final CacheStatistics cacheStatistics = new CacheStatistics();
              
              cacheStatistics.hits = statistics.getCacheHits();
              cacheStatistics.misses = statistics.getCacheMisses();
              cacheStatistics.size = statistics.getObjectCount();
              cacheStatistics.maxSize = cacheConfiguration.getMaxElementsInMemory() + cacheConfiguration.getMaxElementsOnDisk();
              
              allCacheStatistics.put(cacheName, cacheStatistics);
          }
      }

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   * @return the {@link Statistics} for the specified cache; returns null of cache is not alive or doesn't exist
   */
  public Statistics getCacheStatistics(String cacheName) {
    Cache cache = this.cacheManager.getCache(cacheName);
    if(null != cache && Status.STATUS_ALIVE.equals(cache.getStatus())) {
      Statistics result = cache.getStatistics();
      return result;
    }


    return null;
  }

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                java.util.Arrays.sort(ehcacheNames);
                for (String ehcacheName : ehcacheNames) {
                    net.sf.ehcache.Cache ehcache = ehcacheManager.getCache(ehcacheName);
                    strOut.append(ehcacheName).append(": ");
                    if (ehcache.isStatisticsEnabled()) {
                        Statistics ehcacheStats = ehcache.getStatistics();
                        String efficiencyStr = "0";
                        if (ehcacheStats.getCacheHits() + ehcacheStats.getCacheMisses() > 0) {
                            efficiencyStr = percentFormat.format(ehcacheStats.getCacheHits() * 100f / (ehcacheStats.getCacheHits() + ehcacheStats.getCacheMisses()));
                        }
                        strOut.append("size=" + ehcacheStats.getObjectCount()
                                + ", successful hits=" + ehcacheStats.getCacheHits()
                                + ", total hits="
                                + (ehcacheStats.getCacheHits() + ehcacheStats.getCacheMisses())
                                + ", efficiency=" + efficiencyStr + "%");
                    } else {
                        strOut.append("statistics disabled");
                    }
                    strOut.println();

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    protected CacheMonitorState snapshotAndCalculateStatistics(String name, boolean calculate)
    {
        Cache cache = cacheManager.getCache(name);        
        CacheMonitorStateImpl state = new CacheMonitorStateImpl(name);
        Statistics statistics = cache.getStatistics();        
        state.setMemoryStoreSize(cache.getMemoryStoreSize());
        if (calculate)
        {
            state.setInMemorySize(cache.calculateInMemorySize());
            if (calculateObjectCount)
            {
                state.setObjectCount(statistics.getObjectCount());
            }
            else
            {
                state.setObjectCount(0);
            }
            calculatedStates.put(name, new CalculatedState(state.getInMemorySize(), state.getObjectCount()));
        }
        else
        {
            CalculatedState cs = (CalculatedState)calculatedStates.get(name);
            if (cs == null)
            {
                state.setInMemorySize(0);                
                state.setObjectCount(0);
            }
            else
            {
                state.setInMemorySize(cs.inMemorySize);
                state.setObjectCount(cs.objectCount);
            }            
        }
        state.setSize(cache.getSize());
        state.setDiskStoreSize(cache.getDiskStoreSize()); 
        state.setAverageGetTime(statistics.getAverageGetTime());
        state.setCacheHits(statistics.getCacheHits());
        state.setCacheMisses(statistics.getCacheMisses());
        state.setEvictionCount(statistics.getEvictionCount());
        state.setInMemoryHits(statistics.getInMemoryHits());
        state.setOnDiskHits(statistics.getOnDiskHits());
        state.setMaxElementsInMemory(cache.getCacheConfiguration().getMaxElementsInMemory());
        state.setMaxElementsOnDisk(cache.getCacheConfiguration().getMaxElementsOnDisk());            
        state.setTimeToIdle(cache.getCacheConfiguration().getTimeToIdleSeconds());
        state.setTimeToLive(cache.getCacheConfiguration().getTimeToLiveSeconds());
        return state;

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    return removeWithChildren(RepositoryItemUid.PATH_ROOT);
  }


  @Override
  public CacheStatistics getStatistics() {
    Statistics stats = getEHCache().getStatistics();


    return new CacheStatistics(stats.getObjectCount(), stats.getCacheMisses(), stats.getCacheHits());
  }

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        LinkedHashMap<String,String> result = new LinkedHashMap<String, String>();
        for(String cacheName : cachingService.getCacheNames()) {
            Ehcache cache = cachingService.getCacheByName(cacheName);
            if(cache != null) {
                Statistics stat = cache.getStatistics();


                result.put(cacheName + " hits",""+stat.getCacheHits());
                result.put(cacheName + " misses",""+stat.getCacheMisses());
                result.put(cacheName + " size",""+stat.getObjectCount());
            } else {
                log.warn("cache with name {} does not exist",cacheName);
            }
        }
        return result;

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      for (final String cacheName : this.cacheManager.getCacheNames()) {
          final Cache cache = this.cacheManager.getCache(cacheName);
          
          if (null != cache && Status.STATUS_ALIVE.equals(cache.getStatus())) {
              final CacheConfiguration cacheConfiguration = cache.getCacheConfiguration();
              final Statistics statistics = cache.getStatistics();
              
              final CacheStatistics cacheStatistics = new CacheStatistics();
              
              cacheStatistics.hits = statistics.getCacheHits();
              cacheStatistics.misses = statistics.getCacheMisses();
              cacheStatistics.size = statistics.getObjectCount();
              cacheStatistics.maxSize = cacheConfiguration.getMaxElementsInMemory() + cacheConfiguration.getMaxElementsOnDisk();
              
              allCacheStatistics.put(cacheName, cacheStatistics);
          }
      }

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   * @return the {@link Statistics} for the specified cache; returns null of cache is not alive or doesn't exist
   */
  public Statistics getCacheStatistics(String cacheName) {
    Cache cache = this.cacheManager.getCache(cacheName);
    if(null != cache && Status.STATUS_ALIVE.equals(cache.getStatus())) {
      Statistics result = cache.getStatistics();
      return result;
    }


    return null;
  }

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  /**
   * Returns the Cache statistics.
   */
  public Properties getStatistics() {
    Properties props = new Properties();
    Statistics stats = delegate.getStatistics();
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_AverageGetTime, stats.getAverageGetTime() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_AverageSearchTime, stats.getAverageSearchTime() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_CacheHits, stats.getCacheHits() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_CacheMisses, stats.getCacheMisses() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_DiskStoreObjectCount, stats.getDiskStoreObjectCount() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_EvictionCount, stats.getEvictionCount() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_InMemoryHits, stats.getInMemoryHits() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_InMemoryMisses, stats.getInMemoryMisses() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_MemoryStoreObjectCount, stats.getMemoryStoreObjectCount() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_ObjectCount, stats.getObjectCount() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_OffHeapHits, stats.getOffHeapHits() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_OffHeapMisses, stats.getOffHeapMisses() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_OffHeapStoreObjectCount, stats.getOffHeapStoreObjectCount() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_OnDiskHits, stats.getOnDiskHits() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_OnDiskMisses, stats.getOnDiskMisses() + "");
    props.setProperty(CacheStatisticsConstats.KEY_CACHE_STATS_SearchesPerSecond, stats.getSearchesPerSecond() + "");
    return props;
  }

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