Package org.infinispan.stats

Class CacheStatisticCollector

java.lang.Object

org.infinispan.stats.CacheStatisticCollector

public class CacheStatisticCollector
extends Object

Collects and maintains all the statistics for a cache.

Since:

6.0

Author:

Roberto Palmieri, Sebastiano Peluso, Diego Didona, Pedro Ruivo

Constructor Summary

Constructors

Constructor	Description
CacheStatisticCollector(TimeService timeService)

Method Summary

Modifier and Type	Method	Description
void	addLocalValue(ExtendedStatistic stat, double value)	Adds a value to a local statistic.
void	addRemoteValue(ExtendedStatistic stat, double value)	Adds a value to a remote statistic.
static double	convertNanosToMicro(double nanos)
static double	convertNanosToSeconds(double nanos)
void	dumpTo(PrintWriter writer)	Prints the cache statistics values to a PrintStream.
void	dumpTo(StringBuilder builder)	Dumps all the cache statistic values to a StringBuilder
double	getAttribute(ExtendedStatistic stat)
double	getPercentile(PercentileStatistic stat, int percentile)
void	merge(TransactionStatistics transactionStatistics)	Merges a transaction statistics in this cache statistics.
void	reset()	reset all the statistics collected so far.

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheStatisticCollector

public CacheStatisticCollector(TimeService timeService)

Method Detail

reset

public final void reset()

reset all the statistics collected so far.

merge

public final void merge(TransactionStatistics transactionStatistics)

Merges a transaction statistics in this cache statistics.

addLocalValue

public final void addLocalValue(ExtendedStatistic stat,
                                double value)

Adds a value to a local statistic. This value is not associated with any transaction.

addRemoteValue

public final void addRemoteValue(ExtendedStatistic stat,
                                 double value)

Adds a value to a remote statistic. This value is not associated with any transaction.

getPercentile

public final double getPercentile(PercentileStatistic stat,
                                  int percentile)
                           throws IllegalArgumentException

Returns:

the percentile og the statistic.

Throws:

IllegalArgumentException - if the percentile request is not in the correct bounds (]0,100[)

getAttribute

public final double getAttribute(ExtendedStatistic stat)
                          throws ExtendedStatisticNotFoundException

Returns:

the current value of the statistic. If the statistic is not exported (via JMX), then the sum of the remote and local value is returned.

Throws:

ExtendedStatisticNotFoundException - if the statistic is not found.

dumpTo

public final void dumpTo(StringBuilder builder)

Dumps all the cache statistic values to a StringBuilder

dumpTo

public final void dumpTo(PrintWriter writer)

Prints the cache statistics values to a PrintStream.

convertNanosToMicro

public static double convertNanosToMicro(double nanos)

Returns:

the conversion of nanoseconds to microseconds without losing precision.

convertNanosToSeconds

public static double convertNanosToSeconds(double nanos)

Returns:

the conversion of nanoseconds to seconds without losing precision.