Class LocalStatelessSessionProxyFactoryBean

  extended byorg.springframework.jndi.JndiAccessor
      extended byorg.springframework.jndi.JndiLocatorSupport
          extended byorg.springframework.jndi.JndiObjectLocator
              extended byorg.springframework.ejb.access.AbstractSlsbInvokerInterceptor
                  extended byorg.springframework.ejb.access.LocalSlsbInvokerInterceptor
                      extended byorg.springframework.ejb.access.LocalStatelessSessionProxyFactoryBean
All Implemented Interfaces:
Advice, FactoryBean, InitializingBean, Interceptor, MethodInterceptor

public class LocalStatelessSessionProxyFactoryBean
extends LocalSlsbInvokerInterceptor
implements FactoryBean

Convenient factory for local Stateless Session Bean (SLSB) proxies. If you want control over interceptor chaining, use an AOP ProxyFactoryBean with LocalSlsbInvokerInterceptor rather than rely on this class.

See JndiObjectLocator for info on how to specify the JNDI location of the target EJB.

In a bean container, this class is normally best used as a singleton. However, if that bean container pre-instantiates singletons (as do the XML ApplicationContext variants) you may have a problem if the bean container is loaded before the EJB container loads the target EJB. That is because by default the JNDI lookup will be performed in the init method of this class and cached, but the EJB will not have been bound at the target location yet. The best solution is to set the lookupHomeOnStartup property to false, in which case the home will be fetched on first access to the EJB. (This flag is only true by default for backwards compatibility reasons).

Rod Johnson, Colin Sampaleanu
See Also:
AbstractSlsbInvokerInterceptor.setLookupHomeOnStartup(boolean), AbstractSlsbInvokerInterceptor.setCacheHome(boolean)

Field Summary
Fields inherited from class org.springframework.jndi.JndiLocatorSupport
Fields inherited from class org.springframework.jndi.JndiAccessor
Constructor Summary
Method Summary
 void afterPropertiesSet()
          Fetches EJB home on startup, if necessary.
 Class getBusinessInterface()
          Return the business interface of the EJB we're proxying.
 Object getObject()
          Return an instance (possibly shared or independent) of the object managed by this factory.
 Class getObjectType()
          Return the type of object that this FactoryBean creates, or null if not known in advance.
 boolean isSingleton()
          Is the bean managed by this factory a singleton or a prototype?
 void setBusinessInterface(Class businessInterface)
          Set the business interface of the EJB we're proxying.
Methods inherited from class org.springframework.ejb.access.LocalSlsbInvokerInterceptor
getSessionBeanInstance, invoke, newSessionBeanInstance, releaseSessionBeanInstance, removeSessionBeanInstance
Methods inherited from class org.springframework.ejb.access.AbstractSlsbInvokerInterceptor
create, getCreateMethod, getHome, isHomeRefreshable, refreshHome, setCacheHome, setLookupHomeOnStartup
Methods inherited from class org.springframework.jndi.JndiObjectLocator
getJndiName, lookup, setJndiName
Methods inherited from class org.springframework.jndi.JndiLocatorSupport
convertJndiName, isResourceRef, lookup, setResourceRef
Methods inherited from class org.springframework.jndi.JndiAccessor
getJndiEnvironment, getJndiTemplate, setJndiEnvironment, setJndiTemplate
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public LocalStatelessSessionProxyFactoryBean()
Method Detail


public void setBusinessInterface(Class businessInterface)
Set the business interface of the EJB we're proxying. This will normally be a super-interface of the EJB local component interface. Using a business methods interface is a best practice when implementing EJBs.

businessInterface - set the business interface of the EJB


public Class getBusinessInterface()
Return the business interface of the EJB we're proxying.


public void afterPropertiesSet()
                        throws NamingException
Description copied from class: AbstractSlsbInvokerInterceptor
Fetches EJB home on startup, if necessary.

Specified by:
afterPropertiesSet in interface InitializingBean
afterPropertiesSet in class AbstractSlsbInvokerInterceptor
See Also:
AbstractSlsbInvokerInterceptor.setLookupHomeOnStartup(boolean), AbstractSlsbInvokerInterceptor.refreshHome()


public Object getObject()
Description copied from interface: FactoryBean
Return an instance (possibly shared or independent) of the object managed by this factory. As with a BeanFactory, this allows support for both the Singleton and Prototype design pattern.

If this method returns null, the factory will consider the FactoryBean as not fully initialized and throw a corresponding FactoryBeanNotInitializedException.

Specified by:
getObject in interface FactoryBean
an instance of the bean (should not be null; a null value will be considered as an indication of incomplete initialization)
See Also:


public Class getObjectType()
Description copied from interface: FactoryBean
Return the type of object that this FactoryBean creates, or null if not known in advance. This allows to check for specific types of beans without instantiating objects, for example on autowiring.

For a singleton, this should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.

This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.

NOTE: Autowiring will simply ignore FactoryBeans that return null here. Therefore it is highly recommended to implement this method properly, using the current state of the FactoryBean.

Specified by:
getObjectType in interface FactoryBean
the type of object that this FactoryBean creates, or null if not known at the time of the call
See Also:


public boolean isSingleton()
Description copied from interface: FactoryBean
Is the bean managed by this factory a singleton or a prototype? That is, will getObject() always return the same object?

The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.

Specified by:
isSingleton in interface FactoryBean
if this bean is a singleton

Copyright (C) 2003-2004 The Spring Framework Project.