Class QThreadPoolExecutor

java.lang.Object

org.jpos.q2.QBeanSupport

org.jpos.q2.qbean.QThreadPoolExecutor

All Implemented Interfaces:

Configurable, QBean, QThreadPoolExecutorMBean, QBeanSupportMBean, QPersist

public class QThreadPoolExecutor
extends QBeanSupport
implements QThreadPoolExecutorMBean

A qbean dedicated to thread pool executor creation and registration by Q2 NameRegistrar registry

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_TERMINATION_TIMER
static final String	THREAD_POOL_EXECUTOR__QBEAN_PREFIX
static final String	XML_CONFIG_ATTR__EXEC_SRV_COREPOOLSIZE
static final String	XML_CONFIG_ATTR__EXEC_SRV_TERMINATION_TIMER
static final String	XML_CONFIG_ATTR__EXEC_SRV_TYPE

Fields inherited from class QBeanSupport

cfg, log, scheduledThreadPoolExecutor

Fields inherited from interface QBean

DESTROYED, FAILED, STARTED, STARTING, stateString, STOPPED, STOPPING

Constructor Summary

Constructors

Constructor	Description
QThreadPoolExecutor()

Method Summary

Modifier and Type	Method	Description
int	getActiveCount()
protected org.jdom2.Attribute	getAttribute(org.jdom2.Element elt, String attrName, boolean mandatory, String errDesc)
long	getCompletedTaskCount()
int	getCorePoolSize()
String	getExecSrvType()
int	getInitialCorePoolSize()
long	getKeepAliveTimeMS()
int	getLargestPoolSize()
int	getMaximumPoolSize()
int	getPoolSize()
protected String	getRegistrationName()
long	getTaskCount()
int	getTerminationTimer()
static ThreadPoolExecutor	getThreadPoolExecutor(String name)	Retrieves a thread pool executor from NameRegistrar given its name
static <T extends ThreadPoolExecutor> T	getThreadPoolExecutor(String name, Class<T> clazz)	Retrieves a thread pool executor from NameRegistrar given its name, and its expected class
protected void	initService()	Handle specific config elements type := "fixed" | "scheduled" | "cached" corePoolSize := integer (required for "fixed" and "scheduled" kinds, optional for "cached" kind)
boolean	isShutdown()
boolean	isTerminated()
boolean	isTerminating()
protected void	setExecSrvType(String execSrvType)
protected void	setInitialCorePoolSize(int initialCorePoolSize)
protected void	setTerminationTimer(int terminationTimer)
protected void	startService()
protected void	stopService()

Methods inherited from class QBeanSupport

addAttr, close, createElement, destroy, destroyService, getAttrs, getAttrs, getConfiguration, getDump, getFactory, getLoader, getLoaderURLS, getLog, getLogger, getName, getPersist, getProperties, getProperty, getRealm, getScheduledThreadPoolExecutor, getServer, getState, getStateAsString, init, isModified, running, setAttr, setConfiguration, setLogger, setModified, setName, setPersist, setProperty, setRealm, setServer, setState, start, stop

Methods inherited from class Object

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

Methods inherited from interface QBean

destroy, getState, getStateAsString, init, start, stop

Methods inherited from interface QBeanSupportMBean

getDump, getLoader, getLoaderURLS, getLogger, getName, getRealm, getServer, setLogger, setName, setPersist, setRealm, setServer

Methods inherited from interface QPersist

getPersist, isModified

Field Details

THREAD_POOL_EXECUTOR__QBEAN_PREFIX

public static final String THREAD_POOL_EXECUTOR__QBEAN_PREFIX

See Also:

• Constant Field Values

XML_CONFIG_ATTR__EXEC_SRV_TYPE

public static final String XML_CONFIG_ATTR__EXEC_SRV_TYPE

See Also:

• Constant Field Values

XML_CONFIG_ATTR__EXEC_SRV_COREPOOLSIZE

public static final String XML_CONFIG_ATTR__EXEC_SRV_COREPOOLSIZE

See Also:

• Constant Field Values

XML_CONFIG_ATTR__EXEC_SRV_TERMINATION_TIMER

public static final String XML_CONFIG_ATTR__EXEC_SRV_TERMINATION_TIMER

See Also:

• Constant Field Values

DEFAULT_TERMINATION_TIMER

public static final int DEFAULT_TERMINATION_TIMER

See Also:

• Constant Field Values

Constructor Details

QThreadPoolExecutor

public QThreadPoolExecutor()

Method Details

initService

protected void initService()
                    throws Exception

Handle specific config elements type := "fixed" | "scheduled" | "cached" corePoolSize := integer (required for "fixed" and "scheduled" kinds, optional for "cached" kind)

Overrides:

initService in class QBeanSupport

Throws:

Exception

startService

protected void startService()
                     throws Exception

Overrides:

startService in class QBeanSupport

Throws:

Exception

stopService

protected void stopService()
                    throws Exception

Overrides:

stopService in class QBeanSupport

Throws:

Exception

getRegistrationName

protected String getRegistrationName()

getAttribute

protected org.jdom2.Attribute getAttribute(org.jdom2.Element elt,
 String attrName,
 boolean mandatory,
 String errDesc)
                                    throws ConfigurationException

Parameters:

elt -

attrName -

mandatory -

errDesc -

Throws:

ConfigurationException

getThreadPoolExecutor

public static ThreadPoolExecutor getThreadPoolExecutor(String name)
                                                throws NameRegistrar.NotFoundException

Retrieves a thread pool executor from NameRegistrar given its name

Parameters:

name -

Throws:

NameRegistrar.NotFoundException

getThreadPoolExecutor

public static <T extends ThreadPoolExecutor> T getThreadPoolExecutor(String name,
 Class<T> clazz)
                                                              throws NameRegistrar.NotFoundException

Retrieves a thread pool executor from NameRegistrar given its name, and its expected class

Parameters:

name -

clazz -

Throws:

NameRegistrar.NotFoundException

getExecSrvType

public String getExecSrvType()

Specified by:

getExecSrvType in interface QThreadPoolExecutorMBean

Returns:

executor service type

getTerminationTimer

public int getTerminationTimer()

Specified by:

getTerminationTimer in interface QThreadPoolExecutorMBean

Returns:

await termination delay

getActiveCount

public int getActiveCount()
                   throws NameRegistrar.NotFoundException

Specified by:

getActiveCount in interface QThreadPoolExecutorMBean

Returns:

approximate number of threads that are actively executing tasks

Throws:

NameRegistrar.NotFoundException

getCompletedTaskCount

public long getCompletedTaskCount()
                           throws NameRegistrar.NotFoundException

Specified by:

getCompletedTaskCount in interface QThreadPoolExecutorMBean

Returns:

the approximate total number of tasks that have completed execution.

Throws:

NameRegistrar.NotFoundException

getCorePoolSize

public int getCorePoolSize()
                    throws NameRegistrar.NotFoundException

Specified by:

getCorePoolSize in interface QThreadPoolExecutorMBean

Returns:

returns the core number of threads.

Throws:

NameRegistrar.NotFoundException

getKeepAliveTimeMS

public long getKeepAliveTimeMS()
                        throws NameRegistrar.NotFoundException

Specified by:

getKeepAliveTimeMS in interface QThreadPoolExecutorMBean

Returns:

the thread keep-alive time, which is the amount of time (in milliseconds) which threads in excess of the core pool size may remain idle before being terminated

Throws:

NameRegistrar.NotFoundException

getLargestPoolSize

public int getLargestPoolSize()
                       throws NameRegistrar.NotFoundException

Specified by:

getLargestPoolSize in interface QThreadPoolExecutorMBean

Returns:

the largest number of threads that have ever simultaneously been in the pool.

Throws:

NameRegistrar.NotFoundException

getMaximumPoolSize

public int getMaximumPoolSize()
                       throws NameRegistrar.NotFoundException

Specified by:

getMaximumPoolSize in interface QThreadPoolExecutorMBean

Returns:

the maximum allowed number of threads.

Throws:

NameRegistrar.NotFoundException

getPoolSize

public int getPoolSize()
                throws NameRegistrar.NotFoundException

Specified by:

getPoolSize in interface QThreadPoolExecutorMBean

Returns:

the current number of threads in the pool.

Throws:

NameRegistrar.NotFoundException

getTaskCount

public long getTaskCount()
                  throws NameRegistrar.NotFoundException

Specified by:

getTaskCount in interface QThreadPoolExecutorMBean

Returns:

the approximate total number of tasks that have been scheduled for execution

Throws:

NameRegistrar.NotFoundException

isShutdown

public boolean isShutdown()
                   throws NameRegistrar.NotFoundException

Specified by:

isShutdown in interface QThreadPoolExecutorMBean

Returns:

true if this executor has been shut down.

Throws:

NameRegistrar.NotFoundException

isTerminated

public boolean isTerminated()
                     throws NameRegistrar.NotFoundException

Specified by:

isTerminated in interface QThreadPoolExecutorMBean

Returns:

true if all tasks have completed following shut down

Throws:

NameRegistrar.NotFoundException

isTerminating

public boolean isTerminating()
                      throws NameRegistrar.NotFoundException

Specified by:

isTerminating in interface QThreadPoolExecutorMBean

Returns:

true if this executor is in the process of terminating after shutdown or shutdownNow but has not completely terminated.

Throws:

NameRegistrar.NotFoundException

getInitialCorePoolSize

public int getInitialCorePoolSize()

setExecSrvType

protected void setExecSrvType(String execSrvType)

setInitialCorePoolSize

protected void setInitialCorePoolSize(int initialCorePoolSize)

setTerminationTimer

protected void setTerminationTimer(int terminationTimer)