org.jboss.ejb.plugins
Class SingletonStatelessSessionInstancePool

java.lang.Object
  |
  +--org.jboss.ejb.plugins.SingletonStatelessSessionInstancePool

All Implemented Interfaces:

ContainerPlugin, InstancePool, Service, XmlLoadable

public class SingletonStatelessSessionInstancePool

extends java.lang.Object

implements InstancePool, XmlLoadable

Singleton pool for session beans. This lets you have singletons in EJB!

Version:

$Revision: 1.6.6.3 $

Author:

Rickard Öberg (rickard.oberg@telkel.com)

See Also:

Constructor Summary

SingletonStatelessSessionInstancePool()

Method Summary

void	add() Add a instance in the pool
protected EnterpriseContext	create(java.lang.Object instance, Container con)
void	destroy()
void	discard(EnterpriseContext ctx) Discard an anonymous instance after invocation.
void	free(EnterpriseContext ctx) Return an instance after invocation.
EnterpriseContext	get() Get the singleton instance
int	getCurrentSize() Return the size of the pool.
int	getMaxSize() Get the maximum size of the pool.
void	importXml(org.w3c.dom.Element element)
void	init()
void	setContainer(Container c) Set the callback to the container.
void	start()
void	stop()

Methods inherited from class java.lang.Object

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

Constructor Detail

SingletonStatelessSessionInstancePool

public SingletonStatelessSessionInstancePool()

Method Detail

setContainer

public void setContainer(Container c)

Set the callback to the container. This is for initialization. The pool may extract the configuration from the container.

Specified by:

setContainer in interface ContainerPlugin

Parameters:

c -

init

public void init()
          throws java.lang.Exception

Specified by:

init in interface Service

start

public void start()
           throws java.lang.Exception

Specified by:

start in interface Service

stop

public void stop()

Specified by:

stop in interface Service

destroy

public void destroy()

Specified by:

destroy in interface Service

get

public EnterpriseContext get()
                      throws java.lang.Exception

Get the singleton instance

Specified by:

get in interface InstancePool

Returns:

Context /w instance

Throws:

java.rmi.RemoteException -

free

public void free(EnterpriseContext ctx)

Return an instance after invocation. Called in 2 cases: a) Done with finder method b) Just removed

Specified by:

free in interface InstancePool

Parameters:

ctx -

discard

public void discard(EnterpriseContext ctx)

Description copied from interface: InstancePool

Discard an anonymous instance after invocation. This is called if the instance should not be reused, perhaps due to some exception being thrown from it.

Specified by:

discard in interface InstancePool

Following copied from interface: org.jboss.ejb.InstancePool

Parameters:

ctx -

add

public void add()
         throws java.lang.Exception

Add a instance in the pool

Specified by:

add in interface InstancePool

Following copied from interface: org.jboss.ejb.InstancePool

Throws:

java.lang.Exception - when an Instance can not be instantiated

getCurrentSize

public int getCurrentSize()

Description copied from interface: InstancePool

Return the size of the pool.

Specified by:

getCurrentSize in interface InstancePool

Following copied from interface: org.jboss.ejb.InstancePool

Returns:

the size of the pool.

getMaxSize

public int getMaxSize()

Description copied from interface: InstancePool

Get the maximum size of the pool.

Specified by:

getMaxSize in interface InstancePool

Following copied from interface: org.jboss.ejb.InstancePool

Returns:

the size of the pool.

importXml

public void importXml(org.w3c.dom.Element element)
               throws java.lang.Exception

Specified by:

importXml in interface XmlLoadable

create

protected EnterpriseContext create(java.lang.Object instance,
                                   Container con)
                            throws java.lang.Exception