org.infinispan.stats

Class CacheStatisticManager

java.lang.Object

org.infinispan.stats.CacheStatisticManager

public final class CacheStatisticManager
extends Object

Manages all the statistics for a single cache. All the statistics should be added in this class.

Since:

6.0

Author:

Roberto Palmieri, Sebastiano Peluso, Diego Didona, Pedro Ruivo

Constructor Summary

Constructors

Constructor and Description
CacheStatisticManager(Configuration configuration, TimeService timeService)

Method Summary

Methods

Modifier and Type	Method and Description
void	add(ExtendedStatistic stat, double value, GlobalTransaction globalTransaction, boolean local) Adds a value to a statistic.
void	beginTransaction(GlobalTransaction globalTransaction, boolean local) Signals the start of a transaction.
String	dumpCacheStatistics()
void	dumpCacheStatisticsTo(PrintStream stream) Prints the cache statistics values to a PrintStream.
double	getAttribute(ExtendedStatistic stat)
double	getPercentile(PercentileStatistic stat, int percentile)
boolean	hasPendingTransactions()
void	increment(ExtendedStatistic stat, GlobalTransaction globalTransaction, boolean local) Increments the statistic value.
void	markAsWriteTransaction(GlobalTransaction globalTransaction, boolean local) Marks the transaction as a write transaction (instead of a read only transaction)
void	onPrepareCommand(GlobalTransaction globalTransaction, boolean local) Invoked when a PrepareCommand is received for a transaction.
void	reset() Resets the cache statistics collected so far.
void	setTransactionOutcome(boolean commit, GlobalTransaction globalTransaction, boolean local) Sets the transaction outcome to commit or rollback, depending if the transaction has commit successfully or not respectively.
void	terminateTransaction(GlobalTransaction globalTransaction, boolean local, boolean remote) Signals the ending of a transaction.

Constructor Detail

CacheStatisticManager

public CacheStatisticManager(Configuration configuration,
                     TimeService timeService)

Method Detail

add

public final void add(ExtendedStatistic stat,
       double value,
       GlobalTransaction globalTransaction,
       boolean local)

Adds a value to a statistic.

Parameters:

globalTransaction - the global transaction in which the statistics was updated

local - true if measurement occurred in a local context.

increment

public final void increment(ExtendedStatistic stat,
             GlobalTransaction globalTransaction,
             boolean local)

Increments the statistic value. It is equivalent to add(stat, 1, globalTransaction, local).

Parameters:

globalTransaction - the global transaction in which the statistics was updated

local - true if measurement occurred in a local context.

onPrepareCommand

public final void onPrepareCommand(GlobalTransaction globalTransaction,
                    boolean local)

Invoked when a PrepareCommand is received for a transaction.

Parameters:

globalTransaction - the global transaction to be prepared.

local - true if measurement occurred in a local context.

setTransactionOutcome

public final void setTransactionOutcome(boolean commit,
                         GlobalTransaction globalTransaction,
                         boolean local)

Sets the transaction outcome to commit or rollback, depending if the transaction has commit successfully or not respectively.

Parameters:

commit - true if the transaction has committed successfully.

globalTransaction - the terminated global transaction.

local - true if measurement occurred in a local context.

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.

getPercentile

public final double getPercentile(PercentileStatistic stat,
                   int percentile)

Returns:

the percentile og the statistic.

Throws:

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

markAsWriteTransaction

public final void markAsWriteTransaction(GlobalTransaction globalTransaction,
                          boolean local)

Marks the transaction as a write transaction (instead of a read only transaction)

Parameters:

local - true if it is a local transaction.

beginTransaction

public final void beginTransaction(GlobalTransaction globalTransaction,
                    boolean local)

Signals the start of a transaction.

Parameters:

local - true if the transaction is local.

terminateTransaction

public final void terminateTransaction(GlobalTransaction globalTransaction,
                        boolean local,
                        boolean remote)

Signals the ending of a transaction. After this, no more statistics are updated for this transaction and the values measured are merged with the cache statistics.

Parameters:

local - true if the transaction is local.

remote - true if the transaction is remote.

reset

public final void reset()

Resets the cache statistics collected so far.

hasPendingTransactions

public final boolean hasPendingTransactions()

Returns:

true if it has some transaction pending, i.e., transaction in which the statistics can be updated.

dumpCacheStatistics

public final String dumpCacheStatistics()

Returns:

a String with all the cache statistic values.

dumpCacheStatisticsTo

public final void dumpCacheStatisticsTo(PrintStream stream)

Prints the cache statistics values to a PrintStream.