org.deegree_impl.enterprise
Class WCASServicePool

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

All Implemented Interfaces:

java.lang.Runnable

public class WCASServicePool

extends ObjectPool

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

private static WCASServicePool	instance
private WCASCapabilities	wcasCapa
private WFSCapabilities	wfsCapa

Fields inherited from class org.deegree_impl.tools.ObjectPool

available, existingInstances, in_use, startLifeTime, startUsageTime

Fields inherited from class java.util.TimerTask

Constructor Summary

private

WCASServicePool(WCASCapabilities wcasCapa, WFSCapabilities wfsCapa)

Method Summary

java.lang.Object	acuireObject()
void	destroy()
void	fill(int noOfInstances) fill the pool with the submitted number of instances
static WCASServicePool	getInstance(WCASCapabilities wcasCapa, WFSCapabilities wfsCapa) realize singelton pattern using double checked locking pattern.
void	onObjectKill(java.lang.Object o) this method will be called when the submitted object will be removed from the pool
java.lang.String	toString()

Methods inherited from class org.deegree_impl.tools.ObjectPool

clear, getInstance, getMaxInstances, getMaxLifeTime, getMaxUsageTime, getUpdateInterval, releaseObject, run, setMaxInstances, setMaxLifeTime, setMaxUsageTime, setUpdateInterval

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

instance

private static WCASServicePool instance

wcasCapa

private WCASCapabilities wcasCapa

wfsCapa

private WFSCapabilities wfsCapa

Constructor Detail

WCASServicePool

private WCASServicePool(WCASCapabilities wcasCapa,
                        WFSCapabilities wfsCapa)

Method Detail

getInstance

public static WCASServicePool getInstance(WCASCapabilities wcasCapa,
                                          WFSCapabilities wfsCapa)

realize singelton pattern using double checked locking pattern.

Returns:

an instance of the object pool. it is gauranteed that there exists only one instance of pool for each submitted class name.

destroy

public void destroy()

acuireObject

public java.lang.Object acuireObject()
                              throws java.lang.Exception

Throws:

java.lang.Exception

fill

public void fill(int noOfInstances)

fill the pool with the submitted number of instances

onObjectKill

public void onObjectKill(java.lang.Object o)

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

Specified by:

onObjectKill in class ObjectPool

toString

public java.lang.String toString()

Overrides:

toString in class ObjectPool

Returns: