org.jboss.cache.interceptors
Class CacheMgmtInterceptor

java.lang.Object
  org.jboss.cache.commands.AbstractVisitor
      org.jboss.cache.interceptors.base.CommandInterceptor
          org.jboss.cache.interceptors.CacheMgmtInterceptor

All Implemented Interfaces:

Visitor, CacheMgmtInterceptorMBean, InterceptorMBean

public class CacheMgmtInterceptor
extends CommandInterceptor
implements CacheMgmtInterceptorMBean

Captures cache management statistics

Version:

$Id: CacheMgmtInterceptor.java 5728 2008-04-28 15:46:50Z manik.surtani@jboss.com $

Author:

Jerry Gauthier

Field Summary

Fields inherited from class org.jboss.cache.interceptors.base.CommandInterceptor

configuration, log, trace

Constructor Summary

CacheMgmtInterceptor()

Method Summary

Map<String,Object>	dumpStatistics() Returns a map of statistics.
long	getAverageReadTime() Returns average milliseconds for an attribute read operation This includes both hits and misses.
long	getAverageWriteTime() Returns average milliseconds for an attribute write operation
long	getElapsedTime() Returns seconds since cache started
long	getEvictions() Returns the number of cache eviction operations
double	getHitMissRatio() Returns the hit/miss ratio for the cache This ratio is defined as hits/(hits + misses)
long	getHits() Returns the number of cache attribute hits
long	getMisses() Returns the number of cache attribute misses
int	getNumberOfAttributes()
int	getNumberOfNodes()
double	getReadWriteRatio() Returns the read/write ratio for the cache This ratio is defined as (hits + misses)/stores
long	getStores() Returns the number of cache attribute put operations
long	getTimeSinceReset() Returns seconds since cache statistics reset If statistics haven't been reset, this will be the same as ElapsedTime
void	resetStatistics() Resets statistics gathered.
void	setDependencies(DataContainer dataContainer)
Object	visitEvictFqnCommand(InvocationContext ctx, EvictCommand command) Visits a EvictCommand.
Object	visitGetKeyValueCommand(InvocationContext ctx, GetKeyValueCommand command) Visits a GetKeyValueCommand.
Object	visitPutDataMapCommand(InvocationContext ctx, PutDataMapCommand command) Visits a PutDataMapCommand.
Object	visitPutKeyValueCommand(InvocationContext ctx, PutKeyValueCommand command) Visits a PutKeyValueCommand.

Methods inherited from class org.jboss.cache.interceptors.base.CommandInterceptor

getNext, getStatisticsEnabled, handleDefault, hasNext, invokeNextInterceptor, setNext, setStatisticsEnabled

Methods inherited from class org.jboss.cache.commands.AbstractVisitor

visitCollection, visitCommitCommand, visitCreateNodeCommand, visitExistsNodeCommand, visitGetChildrenNamesCommand, visitGetDataMapCommand, visitGetKeysCommand, visitGetNodeCommand, visitGravitateDataCommand, visitInvalidateCommand, visitMoveCommand, visitOptimisticPrepareCommand, visitPrepareCommand, visitRemoveDataCommand, visitRemoveKeyCommand, visitRemoveNodeCommand, visitRollbackCommand

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jboss.cache.interceptors.InterceptorMBean

getStatisticsEnabled, setStatisticsEnabled

Constructor Detail

CacheMgmtInterceptor

public CacheMgmtInterceptor()

Method Detail

setDependencies

public void setDependencies(DataContainer dataContainer)

visitEvictFqnCommand

public Object visitEvictFqnCommand(InvocationContext ctx,
                                   EvictCommand command)
                            throws Throwable

Description copied from interface: Visitor

Visits a EvictCommand.

Specified by:

visitEvictFqnCommand in interface Visitor

Overrides:

visitEvictFqnCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitGetKeyValueCommand

public Object visitGetKeyValueCommand(InvocationContext ctx,
                                      GetKeyValueCommand command)
                               throws Throwable

Description copied from interface: Visitor

Visits a GetKeyValueCommand.

Specified by:

visitGetKeyValueCommand in interface Visitor

Overrides:

visitGetKeyValueCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitPutDataMapCommand

public Object visitPutDataMapCommand(InvocationContext ctx,
                                     PutDataMapCommand command)
                              throws Throwable

Description copied from interface: Visitor

Visits a PutDataMapCommand.

Specified by:

visitPutDataMapCommand in interface Visitor

Overrides:

visitPutDataMapCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

visitPutKeyValueCommand

public Object visitPutKeyValueCommand(InvocationContext ctx,
                                      PutKeyValueCommand command)
                               throws Throwable

Description copied from interface: Visitor

Visits a PutKeyValueCommand.

Specified by:

visitPutKeyValueCommand in interface Visitor

Overrides:

visitPutKeyValueCommand in class AbstractVisitor

Parameters:

ctx - invocation context

command - command to visit

Returns:

response from the visit

Throws:

Throwable - in the event of problems.

getHits

public long getHits()

Description copied from interface: CacheMgmtInterceptorMBean

Returns the number of cache attribute hits

Specified by:

getHits in interface CacheMgmtInterceptorMBean

Returns:

the number of cache hits

getMisses

public long getMisses()

Description copied from interface: CacheMgmtInterceptorMBean

Returns the number of cache attribute misses

Specified by:

getMisses in interface CacheMgmtInterceptorMBean

Returns:

the number of cache misses

getStores

public long getStores()

Description copied from interface: CacheMgmtInterceptorMBean

Returns the number of cache attribute put operations

Specified by:

getStores in interface CacheMgmtInterceptorMBean

Returns:

the number of cache put operations

getEvictions

public long getEvictions()

Description copied from interface: CacheMgmtInterceptorMBean

Returns the number of cache eviction operations

Specified by:

getEvictions in interface CacheMgmtInterceptorMBean

Returns:

the number of cache eviction operations

getHitMissRatio

public double getHitMissRatio()

Description copied from interface: CacheMgmtInterceptorMBean

Returns the hit/miss ratio for the cache This ratio is defined as hits/(hits + misses)

Specified by:

getHitMissRatio in interface CacheMgmtInterceptorMBean

Returns:

the hit/miss ratio for the cache

getReadWriteRatio

public double getReadWriteRatio()

Description copied from interface: CacheMgmtInterceptorMBean

Returns the read/write ratio for the cache This ratio is defined as (hits + misses)/stores

Specified by:

getReadWriteRatio in interface CacheMgmtInterceptorMBean

Returns:

the read/writes ratio for the cache

getAverageReadTime

public long getAverageReadTime()

Description copied from interface: CacheMgmtInterceptorMBean

Returns average milliseconds for an attribute read operation This includes both hits and misses.

Specified by:

getAverageReadTime in interface CacheMgmtInterceptorMBean

Returns:

the average number of milliseconds for a read operation

getAverageWriteTime

public long getAverageWriteTime()

Description copied from interface: CacheMgmtInterceptorMBean

Returns average milliseconds for an attribute write operation

Specified by:

getAverageWriteTime in interface CacheMgmtInterceptorMBean

Returns:

the average number of milliseconds for a write operation

getNumberOfAttributes

public int getNumberOfAttributes()

Specified by:

getNumberOfAttributes in interface CacheMgmtInterceptorMBean

getNumberOfNodes

public int getNumberOfNodes()

Specified by:

getNumberOfNodes in interface CacheMgmtInterceptorMBean

getElapsedTime

public long getElapsedTime()

Description copied from interface: CacheMgmtInterceptorMBean

Returns seconds since cache started

Specified by:

getElapsedTime in interface CacheMgmtInterceptorMBean

Returns:

the number of seconds since the cache was started

getTimeSinceReset

public long getTimeSinceReset()

Description copied from interface: CacheMgmtInterceptorMBean

Returns seconds since cache statistics reset If statistics haven't been reset, this will be the same as ElapsedTime

Specified by:

getTimeSinceReset in interface CacheMgmtInterceptorMBean

Returns:

the number of seconds since the cache statistics were last reset

dumpStatistics

public Map<String,Object> dumpStatistics()

Description copied from class: CommandInterceptor

Returns a map of statistics. This is a default implementation which returns an empty map and should be overridden if it is to be meaningful.

Specified by:

dumpStatistics in interface InterceptorMBean

Overrides:

dumpStatistics in class CommandInterceptor

Returns:

an empty map

resetStatistics

public void resetStatistics()

Description copied from class: CommandInterceptor

Resets statistics gathered. Is a no-op, and should be overridden if it is to be meaningful.

Specified by:

resetStatistics in interface InterceptorMBean

Overrides:

resetStatistics in class CommandInterceptor