wt.pom
Class POMHandler

java.lang.Object
  wt.pom.POMHandler

All Implemented Interfaces:

POMHandlerIfc, Runnable

public class POMHandler

extends Object

implements POMHandlerIfc, Runnable

An adapter to handle dependencies between the wt.method and wt.pom packages which are potentially loaded by different class loaders.

Field Summary

private WTConnection[]	availableConnections
private PersistentObjectManager	pom
private static int	SYNCH_VERBOSE_THRESHOLD
private int	totalConnections

Fields inherited from interface wt.method.POMHandlerIfc

versionID

Constructor Summary

POMHandler()

Method Summary

void	freeConnection(Object connection) Free a datastore connection to be available for reuse.
int	getAvailableConnections() Get total number of available connections.
Object	getConnection() Get an available connection to a datastore.
Object	getPom() Get the POM associated with this handler.
int	getTotalConnections() Get total number of open connections.
private int	idleMonitor()
private int	memoryMonitor()
private void	report()
void	run()

Methods inherited from class java.lang.Object

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

Field Detail

pom

private PersistentObjectManager pom

totalConnections

private int totalConnections

availableConnections

private WTConnection[] availableConnections

SYNCH_VERBOSE_THRESHOLD

private static int SYNCH_VERBOSE_THRESHOLD

Constructor Detail

POMHandler

public POMHandler()

Method Detail

getPom

public Object getPom()
              throws POMInitException

Get the POM associated with this handler.

Specified by:

getPom in interface POMHandlerIfc

Returns:

the new POM instance.

Throws:

Exception - Occurs if the handler cannot construct a persistent object manager.

POMInitException

getConnection

public Object getConnection()
                     throws PersistenceException

Get an available connection to a datastore. If there are no available connections, this method may create a new connection or block waiting for an existing connection to become available.

Specified by:

getConnection in interface POMHandlerIfc

Returns:

the datastore connection

Throws:

PersistenceException - Occurs if the persistent object manager cannot connect to a datastore.

freeConnection

public void freeConnection(Object connection)

Free a datastore connection to be available for reuse.

Specified by:

freeConnection in interface POMHandlerIfc

Parameters:

connection - the datastore connection

getTotalConnections

public int getTotalConnections()

Get total number of open connections.

Specified by:

getTotalConnections in interface POMHandlerIfc

Returns:

the number of open connections

getAvailableConnections

public int getAvailableConnections()

Get total number of available connections.

Returns:

the number of available connections

run

public void run()

Specified by:

run in interface Runnable

report

private void report()

idleMonitor

private int idleMonitor()

memoryMonitor

private int memoryMonitor()