Why there are overloaded create methods in Statful bean?
Hi all,
I have a question ...!
Why there are overloaded create methods for Statefule beans? and why not for Stateless bean?
because any way these create methods are for giving referneces of EJB objects.hence, what is use of overloaded methods in stateful bean?
Thanks in advance.
Regards,
Rahul
Hi Rahul,
Each stateful session bean is tied to a particular client. That means whatever state is passed in during create() is guaranteed
to be available on subsequent invocations. Allowing multiple create methods is a convenience.
For stateless session beans there is no prescribed relationship between the caller and which bean instance is used to handle
an invocation. It wouldn't make sense to allow creation parameters since there would be no guarantee that a subsequent
invocation is handled by an instance containing that particular initialization state.
All of this only applies to the EJB 2.1 and earlier API. Starting in EJB 3.0, there are no longer explicit create() methods.
As you've seen there isn't any benefit to having them in the stateless case. For stateful session beans in EJB 3.0, the
developer can perform initialization by just declaring a particular business method and calling that after first acquiring a
new stateful session bean reference.
--ken
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