What is the difference between session entity and message driven beans ?

What is the difference between session entity and message driven beans ? why beans concept is required?

baddamramesh10@yahoo.co.in
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Apr 24th, 2006
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N.N.Ramesh

Apr 24th, 2006

The difference between Session entity and message driven bean is, the session entity can not stores the information when the system is switched off. while the message driven bean can stores the information even when the system is switched off. In message driven bean the whole message is transferred at a time.

leodonz

Apr 4th, 2007

Session Bean :- Used to encapsulate the business data
Entity bean :- Represents the shared business data
Message driven Bean:- Used for Asynchronus Communication