public class SimpleCacheStatistics extends Base implements CacheStatistics, Serializable
Base.LoggingWriter, Base.StackFrame
Modifier and Type | Field and Description |
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protected long |
m_cCacheHits
The rough (ie unsynchronized) number of calls that could be answered from the front or the back and were answered by data in the front map.
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protected long |
m_cCacheMisses
The rough (ie unsynchronized) number of calls that could be answered from the front or the back and were answered by data in the back map.
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protected long |
m_cCachePrunes
Total number of evictions triggered based on the size of the cache since the last statistics reset.
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protected long |
m_cCachePrunesMillis
Total number of milliseconds used for prune operations since the last statistics reset.
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protected long |
m_cCachePuts
Total number of put operations since the last statistics reset.
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protected long |
m_cHitsMillis
Total number of milliseconds used for get operations that were hits since the last statistics reset.
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protected long |
m_cMissesMillis
Total number of milliseconds used for get operations that were misses since the last statistics reset.
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protected long |
m_cPutsMillis
Total number of milliseconds used for put operations since the last statistics reset.
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Constructor and Description |
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SimpleCacheStatistics()
Default constructor.
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Modifier and Type | Method and Description |
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double |
getAverageGetMillis()
Determine the average number of milliseconds per get() invocation since the cache statistics were last reset.
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double |
getAverageHitMillis()
Determine the average number of milliseconds per get() invocation that is a hit.
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double |
getAverageMissMillis()
Determine the average number of milliseconds per get() invocation that is a miss.
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double |
getAveragePruneMillis()
Calculate the average number of milliseconds that a prune takes.
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double |
getAveragePutMillis()
Determine the average number of milliseconds per put() invocation since the cache statistics were last reset.
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long |
getCacheHits()
Determine the rough number of cache hits since the cache statistics were last reset.
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long |
getCacheHitsMillis()
Determine the total number of milliseconds (since that last statistics reset) for the get() operations for which an entry existed in this map.
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long |
getCacheMisses()
Determine the rough number of cache misses since the cache statistics were last reset.
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long |
getCacheMissesMillis()
Determine the total number of milliseconds (since that last statistics reset) for the get() operations for which no entry existed in this map.
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long |
getCachePrunes()
Determine the rough number of cache pruning cycles since the cache statistics were last reset.
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long |
getCachePrunesMillis()
Determine the total number of milliseconds (since that last statistics reset) spent on cache pruning.
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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.
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long |
getTotalGets()
Determine the total number of get() operations since the cache statistics were last reset.
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long |
getTotalGetsMillis()
Determine the total number of milliseconds spent on get() operations since the cache statistics were last reset.
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long |
getTotalPuts()
Determine the total number of put() operations since the cache statistics were last reset.
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long |
getTotalPutsMillis()
Determine the total number of milliseconds spent on put() operations since the cache statistics were last reset.
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void |
registerCachePrune(long lStartMillis)
Register a cache prune.
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void |
registerHit()
Register a cache hit (no timing information).
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void |
registerHit(long lStartMillis)
Register a cache hit.
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void |
registerHits(int cHits, long lStartMillis)
Register a multiple cache hit.
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void |
registerIncrementalCachePrune(long lStartMillis)
Register an incremental cache prune, which is to say that the time is accreted but the number of prunes does not increase.
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void |
registerMiss()
Register a cache miss (no timing information).
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void |
registerMiss(long lStartMillis)
Register a cache miss.
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void |
registerMisses(int cMisses, long lStartMillis)
Register a multiple cache miss.
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void |
registerPut(long lStartMillis)
Register a cache put.
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void |
registerPuts(int cPuts, long lStartMillis)
Register a multiple cache put.
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void |
resetHitStatistics()
Reset all of the cache statistics.
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String |
toString()
For debugging purposes, format the contents of the SimpleCachingStatistics in a human readable format.
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azzert, azzert, azzert, azzertFailed, breakLines, breakLines, capitalize, checkNotEmpty, checkNotNull, checkRange, computeSafeWaitTime, decimalValue, dup, dup, ensureBigDecimal, ensureClassLoader, ensureRuntimeException, ensureRuntimeException, equals, equalsDeep, err, err, err, err, err, escape, formatDateTime, getCallerStackFrame, getCommonMonitor, getCommonMonitor, getCommonMonitor, getContextClassLoader, getContextClassLoader, getDeepMessage, getErr, getLastSafeTimeMillis, getLog, getMaxDecDigits, getMaxHexDigits, getOriginalException, getOut, getRandom, getRandomBinary, getRandomBinary, getRandomString, getSafeTimeMillis, getStackFrame, getStackFrames, getStackTrace, getStackTrace, getThreadFactory, getTimeZone, getUpTimeMillis, hashCode, hexValue, indentString, indentString, isDecimal, isHex, isLogEcho, isOctal, log, log, log, log, log, makeInteger, makeLong, makeThread, mod, mod, octalValue, out, out, out, out, out, pad, parseBandwidth, parseBandwidth, parseDelimitedString, parseHex, parseHex, parseMemorySize, parseMemorySize, parsePercentage, parseTime, parseTime, parseTimeNanos, parseTimeNanos, printStackTrace, randomize, randomize, randomize, read, read, read, read, read, read, read, replace, setErr, setLog, setLogEcho, setOut, sleep, toBandwidthString, toBandwidthString, toCharEscape, toCrc, toCrc, toCrc, toCrc, toCrc, toDecString, toDelimitedString, toDelimitedString, toDelimitedString, toDelimitedString, toHex, toHex, toHexDump, toHexEscape, toHexEscape, toHexEscape, toHexEscape, toHexString, toMemorySizeString, toMemorySizeString, toQuotedCharEscape, toQuotedStringEscape, toSqlString, toString, toString, toStringEscape, toUnicodeEscape, trace, trace, trace, trace, trace, trace, trace, trace, trace, truncateString, truncateString, wait
protected volatile long m_cCacheHits
protected volatile long m_cHitsMillis
protected volatile long m_cCacheMisses
protected volatile long m_cMissesMillis
protected volatile long m_cCachePuts
protected volatile long m_cPutsMillis
protected volatile long m_cCachePrunes
protected volatile long m_cCachePrunesMillis
public long getTotalGets()
getTotalGets
in interface CacheStatistics
public long getTotalGetsMillis()
getTotalGetsMillis
in interface CacheStatistics
public double getAverageGetMillis()
getAverageGetMillis
in interface CacheStatistics
public long getTotalPuts()
getTotalPuts
in interface CacheStatistics
public long getTotalPutsMillis()
getTotalPutsMillis
in interface CacheStatistics
public double getAveragePutMillis()
getAveragePutMillis
in interface CacheStatistics
public long getCacheHits()
A cache hit is a read operation invocation (e.g. get()) for which an entry exists in this map.
getCacheHits
in interface CacheStatistics
public long getCacheHitsMillis()
getCacheHitsMillis
in interface CacheStatistics
public double getAverageHitMillis()
getAverageHitMillis
in interface CacheStatistics
public long getCacheMisses()
A cache miss is a get() invocation that does not have an entry in this map.
getCacheMisses
in interface CacheStatistics
public long getCacheMissesMillis()
getCacheMissesMillis
in interface CacheStatistics
public double getAverageMissMillis()
getAverageMissMillis
in interface CacheStatistics
public double getHitProbability()
getHitProbability
in interface CacheStatistics
public long getCachePrunes()
For the LocalCache implementation, this refers to the number of times that the prune() method is executed.
getCachePrunes
in interface CacheStatistics
public long getCachePrunesMillis()
For the LocalCache implementation, this refers to the time spent in the prune() method.
getCachePrunesMillis
in interface CacheStatistics
public double getAveragePruneMillis()
public void resetHitStatistics()
Note that the method name implies that only the hit statistics are cleared, which is not the case; all of the statistics are cleared.
resetHitStatistics
in interface CacheStatistics
public String toString()
public void registerHit()
public void registerHit(long lStartMillis)
lStartMillis
- the time when the get operation startedpublic void registerHits(int cHits, long lStartMillis)
cHits
- the number of hitslStartMillis
- the time when the get operation startedpublic void registerMiss()
public void registerMiss(long lStartMillis)
lStartMillis
- the time when the get operation startedpublic void registerMisses(int cMisses, long lStartMillis)
cMisses
- the number of misseslStartMillis
- the time when the get operation startedpublic void registerPut(long lStartMillis)
lStartMillis
- the time when the put operation startedpublic void registerPuts(int cPuts, long lStartMillis)
cPuts
- the number of putslStartMillis
- the time when the put operation startedpublic void registerCachePrune(long lStartMillis)
lStartMillis
- the time when the prune operation startedpublic void registerIncrementalCachePrune(long lStartMillis)
lStartMillis
- the time when the prune operation started