Package com.tangosol.net.partition

Class PartitionSplittingBackingMap.AggregatingCacheStatistics

java.lang.Object
com.tangosol.net.partition.PartitionSplittingBackingMap.AggregatingCacheStatistics
All Implemented Interfaces:
CacheStatistics
Enclosing class:
PartitionSplittingBackingMap
public class PartitionSplittingBackingMap.AggregatingCacheStatistics extends Object implements CacheStatistics
An implementation of the CacheStatics interface that aggregates across the CacheStatics objects provided by each of the backing maps corresponding to the partitions managed by this PartitionSplittingBackingMap.

  • Constructor Summary

    Constructors
    Constructor
    Description
    AggregatingCacheStatistics()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    double
    getAverageGetMillis()
    Determine the average number of milliseconds per get() invocation since the cache statistics were last reset.
    double
    getAverageHitMillis()
    Determine the average number of milliseconds per get() invocation that is a hit.
    double
    getAverageMissMillis()
    Determine the average number of milliseconds per get() invocation that is a miss.
    double
    getAveragePutMillis()
    Determine the average number of milliseconds per put() invocation since the cache statistics were last reset.
    long
    getCacheHits()
    Determine the rough number of cache hits since the cache statistics were last reset.
    long
    getCacheHitsMillis()
    Determine the total number of milliseconds (since the last statistics reset) for the get() operations for which an entry existed in this map.
    long
    getCacheMisses()
    Determine the rough number of cache misses since the cache statistics were last reset.
    long
    getCacheMissesMillis()
    Determine the total number of milliseconds (since the last statistics reset) for the get() operations for which no entry existed in this map.
    long
    getCachePrunes()
    Determine the rough number of cache pruning cycles since the cache statistics were last reset.
    long
    getCachePrunesMillis()
    Determine the total number of milliseconds (since the last statistics reset) spent on cache pruning.
    double
    getHitProbability()
    Determine the rough probability (0 <= p <= 1) that the next invocation will be a hit, based on the statistics collected since the last reset of the cache statistics.
    long
    getTotalGets()
    Determine the total number of get() operations since the cache statistics were last reset.
    long
    getTotalGetsMillis()
    Determine the total number of milliseconds spent on get() operations since the cache statistics were last reset.
    long
    getTotalPuts()
    Determine the total number of put() operations since the cache statistics were last reset.
    long
    getTotalPutsMillis()
    Determine the total number of milliseconds spent on put() operations since the cache statistics were last reset.
    void
    resetHitStatistics()
    Reset all of the cache statistics.
    String
    toString()
    For debugging purposes, format the statistics information into a human-readable format.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

  • Constructor Details

    • AggregatingCacheStatistics

      public AggregatingCacheStatistics()

  • Method Details

    • getTotalGets

      public long getTotalGets()
      Determine the total number of get() operations since the cache statistics were last reset.
      Specified by:
      getTotalGets in interface CacheStatistics
      Returns:
      the total number of get() operations

    • getTotalGetsMillis

      public long getTotalGetsMillis()
      Determine the total number of milliseconds spent on get() operations since the cache statistics were last reset.
      Specified by:
      getTotalGetsMillis in interface CacheStatistics
      Returns:
      the total number of milliseconds processing get() operations

    • getAverageGetMillis

      public double getAverageGetMillis()
      Determine the average number of milliseconds per get() invocation since the cache statistics were last reset.
      Specified by:
      getAverageGetMillis in interface CacheStatistics
      Returns:
      the average number of milliseconds per get() operation

    • getTotalPuts

      public long getTotalPuts()
      Determine the total number of put() operations since the cache statistics were last reset.
      Specified by:
      getTotalPuts in interface CacheStatistics
      Returns:
      the total number of put() operations

    • getTotalPutsMillis

      public long getTotalPutsMillis()
      Determine the total number of milliseconds spent on put() operations since the cache statistics were last reset.
      Specified by:
      getTotalPutsMillis in interface CacheStatistics
      Returns:
      the total number of milliseconds processing put() operations

    • getAveragePutMillis

      public double getAveragePutMillis()
      Determine the average number of milliseconds per put() invocation since the cache statistics were last reset.
      Specified by:
      getAveragePutMillis in interface CacheStatistics
      Returns:
      the average number of milliseconds per put() operation

    • getCacheHits

      public long getCacheHits()
      Determine the rough number of cache hits since the cache statistics were last reset.

      A cache hit is a read operation invocation (e.g. get()) for which an entry exists in this map.

      Specified by:
      getCacheHits in interface CacheStatistics
      Returns:
      the number of get() calls that have been served by existing cache entries

    • getCacheHitsMillis

      public long getCacheHitsMillis()
      Determine the total number of milliseconds (since the last statistics reset) for the get() operations for which an entry existed in this map.
      Specified by:
      getCacheHitsMillis in interface CacheStatistics
      Returns:
      the total number of milliseconds for the get() operations that were hits

    • getAverageHitMillis

      public double getAverageHitMillis()
      Determine the average number of milliseconds per get() invocation that is a hit.
      Specified by:
      getAverageHitMillis in interface CacheStatistics
      Returns:
      the average number of milliseconds per cache hit

    • getCacheMisses

      public long getCacheMisses()
      Determine the rough number of cache misses since the cache statistics were last reset.

      A cache miss is a get() invocation that does not have an entry in this map.

      Specified by:
      getCacheMisses in interface CacheStatistics
      Returns:
      the number of get() calls that failed to find an existing cache entry because the requested key was not in the cache

    • getCacheMissesMillis

      public long getCacheMissesMillis()
      Determine the total number of milliseconds (since the last statistics reset) for the get() operations for which no entry existed in this map.
      Specified by:
      getCacheMissesMillis in interface CacheStatistics
      Returns:
      the total number of milliseconds (since the last statistics reset) for the get() operations that were misses

    • getAverageMissMillis

      public double getAverageMissMillis()
      Determine the average number of milliseconds per get() invocation that is a miss.
      Specified by:
      getAverageMissMillis in interface CacheStatistics
      Returns:
      the average number of milliseconds per cache miss

    • getHitProbability

      public double getHitProbability()
      Determine the rough probability (0 <= p <= 1) that the next invocation will be a hit, based on the statistics collected since the last reset of the cache statistics.
      Specified by:
      getHitProbability in interface CacheStatistics
      Returns:
      the cache hit probability (0 <= p <= 1)

    • getCachePrunes

      public long getCachePrunes()
      Determine the rough number of cache pruning cycles since the cache statistics were last reset.

      For the LocalCache implementation, this refers to the number of times that the prune() method is executed.

      Specified by:
      getCachePrunes in interface CacheStatistics
      Returns:
      the total number of cache pruning cycles (since the last statistics reset)

    • getCachePrunesMillis

      public long getCachePrunesMillis()
      Determine the total number of milliseconds (since the last statistics reset) spent on cache pruning.

      For the LocalCache implementation, this refers to the time spent in the prune() method.

      Specified by:
      getCachePrunesMillis in interface CacheStatistics
      Returns:
      the total number of milliseconds (since the last statistics reset) for cache pruning operations

    • resetHitStatistics

      public void resetHitStatistics()
      Reset all of the cache statistics.

      Note that the method name implies that only the hit statistics are cleared, which is not the case; all of the statistics are cleared.

      Specified by:
      resetHitStatistics in interface CacheStatistics

    • toString

      public String toString()
      For debugging purposes, format the statistics information into a human-readable format.
      Overrides:
      toString in class Object
      Returns:
      a String representation of this object