Package jadex.commons

Class DefaultPoolStrategy

java.lang.Object

jadex.commons.DefaultPoolStrategy

All Implemented Interfaces:

IPoolStrategy

public class DefaultPoolStrategy
extends java.lang.Object
implements IPoolStrategy

This strategy has two parameters: - The desired number of free workers in the pool. - The maximum timeout for workers to wait for new tasks.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	capacity	The number of free workers.
protected int	deferdec	The defer factor to slow down thread deletion.
protected int	deferdectarget
protected int	deferinc	The defer factor to slow down thread creation.
protected int	deferinctarget
protected int	desfree	The desired number of free workers.
protected boolean	dodeferdec	Defer the deletion of threads according to their distance from desfree.
protected boolean	dodeferinc	Defer the creation of threads according to their distance from desfree.
protected int	maxcnt	The maximum number of allowed workers.
protected long	maxwait	The max wait time for workers.
protected java.util.List<java.lang.Double>	waitings	The waiting times of the pool.
protected int	workercnt	The number of workers in the pool.

Constructor Summary

Constructors

Constructor	Description
DefaultPoolStrategy()	Create a new default pool strategy.
DefaultPoolStrategy(int desfree, int maxcnt)	Create a new default pool strategy.
DefaultPoolStrategy(int workercnt, int desfree, long maxwait, int maxcnt)	Create a new default pool strategy.
DefaultPoolStrategy(int workercnt, int desfree, long maxwait, int maxcnt, boolean defer)	Create a new default pool strategy.
DefaultPoolStrategy(int workercnt, int desfree, long maxwait, int maxcnt, boolean deferinc, boolean deferdec)	Create a new default pool strategy.
DefaultPoolStrategy(int desfree, long maxwait, int maxcnt)	Create a new default pool strategy.

Method Summary

Modifier and Type	Method	Description
int	getCapacity()	Get the capacity.
int	getDesiredFree()	Get the desfree.
int	getMaxCount()	Get the max cnt.
long	getMaxWait()	Get the maxwait.
int	getWorkerCount()	Get the worker cnt.
long	getWorkerTimeout()	Get the worker timeout.
void	setCapacity(int capacity)	Set the capacity.
void	setDesiredFree(int desfree)	Set the desfree.
void	setMaxCount(int maxcnt)	Set the max cnt.
void	setMaxWait(long maxwait)	Set the maxwait.
void	setWorkerCount(int workercnt)	Set the worker cnt.
boolean	taskAdded()	Called when a new task was added to the pool.
boolean	taskFinished()	Called when a task is finished.
void	taskServed(long waitdur)	Called when a new task was served from the pool.
java.lang.String	toString()	Get the string representation.
void	workersAdded(int cnt)	Called when a new worker was added proactively to the pool.
boolean	workerTimeoutOccurred()	Notify the strategy that a timeout for a worker has occurred, i.e.

Methods inherited from class java.lang.Object

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

Field Detail

workercnt

protected int workercnt

The number of workers in the pool.

capacity

protected int capacity

The number of free workers.

desfree

protected int desfree

The desired number of free workers.

maxwait

protected long maxwait

The max wait time for workers.

maxcnt

protected int maxcnt

The maximum number of allowed workers.

dodeferinc

protected boolean dodeferinc

Defer the creation of threads according to their distance from desfree.

dodeferdec

protected boolean dodeferdec

Defer the deletion of threads according to their distance from desfree.

deferinc

protected int deferinc

The defer factor to slow down thread creation.

deferinctarget

protected int deferinctarget

deferdec

protected int deferdec

The defer factor to slow down thread deletion.

deferdectarget

protected int deferdectarget

waitings

protected java.util.List<java.lang.Double> waitings

The waiting times of the pool.

Constructor Detail

DefaultPoolStrategy

public DefaultPoolStrategy()

Create a new default pool strategy.

DefaultPoolStrategy

public DefaultPoolStrategy(int desfree,
                           int maxcnt)

Create a new default pool strategy.

DefaultPoolStrategy

public DefaultPoolStrategy(int desfree,
                           long maxwait,
                           int maxcnt)

Create a new default pool strategy.

DefaultPoolStrategy

public DefaultPoolStrategy(int workercnt,
                           int desfree,
                           long maxwait,
                           int maxcnt)

Create a new default pool strategy.

DefaultPoolStrategy

public DefaultPoolStrategy(int workercnt,
                           int desfree,
                           long maxwait,
                           int maxcnt,
                           boolean defer)

Create a new default pool strategy.

DefaultPoolStrategy

public DefaultPoolStrategy(int workercnt,
                           int desfree,
                           long maxwait,
                           int maxcnt,
                           boolean deferinc,
                           boolean deferdec)

Create a new default pool strategy.

Method Detail

taskAdded

public boolean taskAdded()

Called when a new task was added to the pool.

Specified by:

taskAdded in interface IPoolStrategy

Returns:

True, if a new worker should be added to the pool.

workersAdded

public void workersAdded(int cnt)

Called when a new worker was added proactively to the pool.

Specified by:

workersAdded in interface IPoolStrategy

Parameters:

cnt - The number of new workers.

taskServed

public void taskServed(long waitdur)

Called when a new task was served from the pool.

Specified by:

taskServed in interface IPoolStrategy

Parameters:

waitdur - The waiting time of the task.

taskFinished

public boolean taskFinished()

Called when a task is finished.

Specified by:

taskFinished in interface IPoolStrategy

Returns:

True, if executing worker be excluded from the pool.

getWorkerTimeout

public long getWorkerTimeout()

Get the worker timeout.

Specified by:

getWorkerTimeout in interface IPoolStrategy

Returns:

The timeout for the worker to wait for new tasks in the pool.

workerTimeoutOccurred

public boolean workerTimeoutOccurred()

Notify the strategy that a timeout for a worker has occurred, i.e. it was not needed for serving some task.

Specified by:

workerTimeoutOccurred in interface IPoolStrategy

Returns:

True, if the worker be excluded from the pool.

getWorkerCount

public int getWorkerCount()

Get the worker cnt.

Specified by:

getWorkerCount in interface IPoolStrategy

setWorkerCount

public void setWorkerCount(int workercnt)

Set the worker cnt.

Parameters:

workercnt - The workercnt to set.

getCapacity

public int getCapacity()

Get the capacity.

Specified by:

getCapacity in interface IPoolStrategy

Returns:

The capacity.

setCapacity

public void setCapacity(int capacity)

Set the capacity.

Parameters:

capacity - The capacity to set.

getDesiredFree

public int getDesiredFree()

Get the desfree.

Returns:

The desfree.

setDesiredFree

public void setDesiredFree(int desfree)

Set the desfree.

Parameters:

desfree - The desfree to set.

getMaxWait

public long getMaxWait()

Get the maxwait.

Returns:

The maxwait.

setMaxWait

public void setMaxWait(long maxwait)

Set the maxwait.

Parameters:

maxwait - The maxwait to set.

getMaxCount

public int getMaxCount()

Get the max cnt.

Returns:

The max cnt.

setMaxCount

public void setMaxCount(int maxcnt)

Set the max cnt.

Parameters:

maxservicecnt - The max cnt to set.

toString

public java.lang.String toString()

Get the string representation.

Overrides:

toString in class java.lang.Object