org.deegree_impl.tools
Class ObjectPool

java.lang.Object
  java.util.TimerTask
      org.deegree_impl.tools.ObjectPool

All Implemented Interfaces:

java.lang.Runnable

Direct Known Subclasses:

DBPool, WCASServicePool, WCServicePool, WFSGServicePool, WFSServicePool, WMServicePool, WTServicePool

public abstract class ObjectPool

extends java.util.TimerTask

class to manage the object pool. this is part of the combination of the object pool pattern an the singelton pattern.

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Version:

07.02.2001

Author:

Andreas Poth

Field Summary

protected java.util.List	available
protected int	existingInstances
protected java.util.List	in_use
private int	maxInstances
private int	maxLifeTime
private int	maxUsageTime
protected java.util.Map	startLifeTime
protected java.util.Map	startUsageTime
private int	updateInterval

Fields inherited from class java.util.TimerTask

Constructor Summary

protected

ObjectPool() Creates a new ObjectPool object.

Method Summary

private void	cleaner()
void	clear() clears the complete pool. objects in used while the clear() method has been called won't be put back to the pool if released back through the releaseObject method.
static ObjectPool	getInstance() dummy
int	getMaxInstances()
int	getMaxLifeTime()
int	getMaxUsageTime()
int	getUpdateInterval()
abstract void	onObjectKill(java.lang.Object o) this method will be called when the submitted object will be removed from the pool
void	releaseObject(java.lang.Object object) release an object back to the pool so it is available from other requests.
void	run()
void	setMaxInstances(int maxInstances)
void	setMaxLifeTime(int maxLifeTime)
void	setMaxUsageTime(int maxUsageTime)
void	setUpdateInterval(int updateInterval)
java.lang.String	toString()
private void	usage()

Methods inherited from class java.util.TimerTask

cancel, scheduledExecutionTime

Methods inherited from class java.lang.Object

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

Field Detail

available

protected java.util.List available

in_use

protected java.util.List in_use

startLifeTime

protected java.util.Map startLifeTime

startUsageTime

protected java.util.Map startUsageTime

existingInstances

protected int existingInstances

maxInstances

private int maxInstances

maxLifeTime

private int maxLifeTime

maxUsageTime

private int maxUsageTime

updateInterval

private int updateInterval

Constructor Detail

ObjectPool

protected ObjectPool()

Creates a new ObjectPool object.

Method Detail

getInstance

public static ObjectPool getInstance()

dummy

Returns:

null

clear

public void clear()

clears the complete pool. objects in used while the clear() method has been called won't be put back to the pool if released back through the releaseObject method.

releaseObject

public void releaseObject(java.lang.Object object)
                   throws java.lang.Exception

release an object back to the pool so it is available from other requests.

Throws:

java.lang.Exception

onObjectKill

public abstract void onObjectKill(java.lang.Object o)

this method will be called when the submitted object will be removed from the pool

getMaxLifeTime

public int getMaxLifeTime()

Returns:

setMaxLifeTime

public void setMaxLifeTime(int maxLifeTime)

Parameters:

maxLifeTime -

getMaxUsageTime

public int getMaxUsageTime()

Returns:

setMaxUsageTime

public void setMaxUsageTime(int maxUsageTime)

Parameters:

maxUsageTime -

getUpdateInterval

public int getUpdateInterval()

Returns:

setUpdateInterval

public void setUpdateInterval(int updateInterval)

Parameters:

updateInterval -

getMaxInstances

public int getMaxInstances()

Returns:

setMaxInstances

public void setMaxInstances(int maxInstances)

Parameters:

maxInstances -

toString

public java.lang.String toString()

Returns:

run

public void run()

cleaner

private void cleaner()

usage

private void usage()