org.jboss.ejb.plugins
Class SingletonStatelessSessionInstancePool

java.lang.Object
  org.jboss.mx.util.JBossNotificationBroadcasterSupport
      org.jboss.system.ServiceMBeanSupport
          org.jboss.ejb.plugins.AbstractInstancePool
              org.jboss.ejb.plugins.SingletonStatelessSessionInstancePool

All Implemented Interfaces:

javax.management.MBeanRegistration, javax.management.NotificationBroadcaster, javax.management.NotificationEmitter, AllowedOperationsFlags, ContainerPlugin, InstancePool, AbstractInstancePoolMBean, XmlLoadable, org.jboss.system.Service, org.jboss.system.ServiceMBean

public class SingletonStatelessSessionInstancePool
extends AbstractInstancePool

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

Version:

$Revision: 57209 $

Author:

Rickard Oberg

Field Summary

Fields inherited from class org.jboss.ejb.plugins.AbstractInstancePool

container, maxSize, pool, reclaim

Fields inherited from class org.jboss.system.ServiceMBeanSupport

log, server, SERVICE_CONTROLLER_SIG, serviceName

Fields inherited from interface org.jboss.system.ServiceMBean

CREATE_EVENT, CREATED, DESTROY_EVENT, DESTROYED, FAILED, REGISTERED, START_EVENT, STARTED, STARTING, states, STOP_EVENT, STOPPED, STOPPING, UNREGISTERED

Fields inherited from interface org.jboss.ejb.AllowedOperationsFlags

IN_AFTER_BEGIN, IN_AFTER_COMPLETION, IN_BEFORE_COMPLETION, IN_BUSINESS_METHOD, IN_EJB_ACTIVATE, IN_EJB_CREATE, IN_EJB_FIND, IN_EJB_HOME, IN_EJB_LOAD, IN_EJB_PASSIVATE, IN_EJB_POST_CREATE, IN_EJB_REMOVE, IN_EJB_STORE, IN_EJB_TIMEOUT, IN_INTERCEPTOR_METHOD, IN_SERVICE_ENDPOINT_METHOD, IN_SET_ENTITY_CONTEXT, IN_SET_MESSAGE_DRIVEN_CONTEXT, IN_SET_SESSION_CONTEXT, IN_UNSET_ENTITY_CONTEXT, NOT_ALLOWED

Constructor Summary

SingletonStatelessSessionInstancePool()

Method Summary

void	add() Add a instance in the pool
void	create()
protected EnterpriseContext	create(Object instance)
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(Element element) XmlLoadable implementation
void	start()
void	stop()

Methods inherited from class org.jboss.ejb.plugins.AbstractInstancePool

clear, destroyService, getAvailableCount, getContainer, setContainer

Methods inherited from class org.jboss.system.ServiceMBeanSupport

createService, getDeploymentInfo, getLog, getName, getNextNotificationSequenceNumber, getObjectName, getServer, getServiceName, getState, getStateString, jbossInternalCreate, jbossInternalDescription, jbossInternalDestroy, jbossInternalLifecycle, jbossInternalStart, jbossInternalStop, postDeregister, postRegister, preDeregister, preRegister, startService, stopService

Methods inherited from class org.jboss.mx.util.JBossNotificationBroadcasterSupport

addNotificationListener, getNotificationInfo, handleNotification, nextNotificationSequenceNumber, removeNotificationListener, removeNotificationListener, sendNotification

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jboss.system.ServiceMBean

getName, getState, getStateString, jbossInternalLifecycle

Constructor Detail

SingletonStatelessSessionInstancePool

public SingletonStatelessSessionInstancePool()

Method Detail

create

public void create()
            throws Exception

Specified by:

create in interface org.jboss.system.Service

Overrides:

create in class org.jboss.system.ServiceMBeanSupport

Throws:

Exception

start

public void start()
           throws Exception

Specified by:

start in interface org.jboss.system.Service

Overrides:

start in class org.jboss.system.ServiceMBeanSupport

Throws:

Exception

stop

public void stop()

Specified by:

stop in interface org.jboss.system.Service

Overrides:

stop in class org.jboss.system.ServiceMBeanSupport

destroy

public void destroy()

Specified by:

destroy in interface org.jboss.system.Service

Overrides:

destroy in class org.jboss.system.ServiceMBeanSupport

get

public EnterpriseContext get()
                      throws Exception

Get the singleton instance

Specified by:

get in interface InstancePool

Overrides:

get in class AbstractInstancePool

Returns:

Context /w instance

Throws:

Exception

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

Overrides:

free in class AbstractInstancePool

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

Overrides:

discard in class AbstractInstancePool

Parameters:

ctx - The context to discard.

add

public void add()
         throws Exception

Add a instance in the pool

Throws:

Exception

getCurrentSize

public int getCurrentSize()

Description copied from interface: InstancePool

Return the size of the pool.

Specified by:

getCurrentSize in interface InstancePool

Specified by:

getCurrentSize in interface AbstractInstancePoolMBean

Overrides:

getCurrentSize in class AbstractInstancePool

Returns:

the current pool size

getMaxSize

public int getMaxSize()

Description copied from interface: InstancePool

Get the maximum size of the pool.

Specified by:

getMaxSize in interface InstancePool

Specified by:

getMaxSize in interface AbstractInstancePoolMBean

Overrides:

getMaxSize in class AbstractInstancePool

Returns:

the current pool size

importXml

public void importXml(Element element)
               throws org.jboss.deployment.DeploymentException

Description copied from class: AbstractInstancePool

XmlLoadable implementation

Specified by:

importXml in interface XmlLoadable

Overrides:

importXml in class AbstractInstancePool

Throws:

org.jboss.deployment.DeploymentException

create

protected EnterpriseContext create(Object instance)
                            throws Exception

Specified by:

create in class AbstractInstancePool

Throws:

Exception