Package com.sap.cloud.sdk.cloudplatform.cache

Interface CacheStatsMXBean

All Known Implementing Classes:
CacheStats
public interface CacheStatsMXBean
JMX wrapper interface for the Guava CacheStats.

  • Method Summary

    Modifier and Type
    Method
    Description
    long
    getEvictionCount()
    Returns the number of times an entry has been evicted.
    long
    getHitCount()
    Returns the number of times Cache lookup methods have returned a cached value.
    long
    getLoadExceptionCount()
    Returns the number of times Cache lookup methods threw an exception while loading a new value.
    long
    getLoadSuccessCount()
    Returns the number of times Cache lookup methods have successfully loaded a new value.
    long
    getMissCount()
    Returns the number of times Cache lookup methods have returned an uncached (newly loaded) value, or null.
    long
    getTotalLoadTime()
    Returns the total number of nanoseconds the cache has spent loading new values.

  • Method Details

    • getHitCount

      long getHitCount()
      Returns the number of times Cache lookup methods have returned a cached value.
      Returns:
      The number of successful cache lookups.
      See Also:
      • CacheStats.hitCount()

    • getMissCount

      long getMissCount()
      Returns the number of times Cache lookup methods have returned an uncached (newly loaded) value, or null. Multiple concurrent calls to Cache lookup methods on an absent value can result in multiple misses, all returning the results of a single cache load operation.
      Returns:
      The number of cache lookup misses.
      See Also:
      • CacheStats.missCount()

    • getLoadSuccessCount

      long getLoadSuccessCount()
      Returns the number of times Cache lookup methods have successfully loaded a new value. This is usually incremented in conjunction with getMissCount(), though getMissCount is also incremented when an exception is encountered during cache loading (see getLoadExceptionCount()). Multiple concurrent misses for the same key will result in a single load operation. This may be incremented not in conjunction with getMissCount if the load occurs as a result of a refresh or if the cache loader returned more items than was requested. getMissCount may also be incremented not in conjunction with this (nor getLoadExceptionCount()) on calls to getIfPresent.
      Returns:
      The number of successful loads of new cache entries.
      See Also:
      • CacheStats.loadSuccessCount()

    • getLoadExceptionCount

      long getLoadExceptionCount()
      Returns the number of times Cache lookup methods threw an exception while loading a new value. This is usually incremented in conjunction with getMissCount, though getMissCount is also incremented when cache loading completes successfully (see getLoadSuccessCount()). Multiple concurrent misses for the same key will result in a single load operation. This may be incremented not in conjunction with getMissCount if the load occurs as a result of a refresh or if the cache loader returned more items than was requested. getMissCount may also be incremented not in conjunction with this (nor getLoadSuccessCount()) on calls to getIfPresent.
      Returns:
      The number of exception during the load of new cache entries.
      See Also:
      • CacheStats.loadExceptionCount()

    • getTotalLoadTime

      long getTotalLoadTime()
      Returns the total number of nanoseconds the cache has spent loading new values. This can be used to calculate the miss penalty. This value is increased every time getLoadSuccessCount or getLoadExceptionCount is incremented.
      Returns:
      The total time spent loading new values, in nanoseconds.
      See Also:
      • CacheStats.totalLoadTime()

    • getEvictionCount

      long getEvictionCount()
      Returns the number of times an entry has been evicted. This count does not include manual invalidations.
      Returns:
      The number of automatic eviction of entries.
      See Also:
      • CacheStats.evictionCount()