CallBack

[Prashanth Bhanu]

hi Friends,
As we all know we have a ejbCreate(),ejbRemove()..so on methods in a bean,
But i'm unable to understand why they are called as "callback" methods???.
yes these methods will be invoked by the container to obtain the services for the bean.But still why these methods are called as callback.
Plz help me to understand it as u all have understood
thanx in advance
prashu

[David Harkness]

Originally posted by prashu bk:
But i'm unable to understand why they are called as "callback" methods?

Are you asking for the definition of a callback method? The name "callback" comes from how they are used: "Call me when X happens." When the container activates a bean instance, it calls its ejbActivate method so the bean can do something in response to the event.

Or are you asking for the reason why callback methods were used in EJBs? "Right tool for the job."

[Rajeev Asthana]

Originally posted by prashu bk:
hi Friends,
As we all know we have a ejbCreate(),ejbRemove()..so on methods in a bean,
But i'm unable to understand why they are called as "callback" methods???.
yes these methods will be invoked by the container to obtain the services for the bean.But still why these methods are called as callback.
Plz help me to understand it as u all have understood
thanx in advance
prashu

Container calls these methods during the lifecycle events of a bean. That's why they are callbacks.