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Topic: What is EJB or Enterprise Java Beans and Explain the types of EJB

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User: pankaj244 Post Date: 25 May 2011 14:24

Introduction:
An Enterprise Java Bean is a Server side component of J2EE applications that can be used alone or with other EJB to execute the business logic on the J2EE server.




Main Content:

There are three types of EJB

A)session EJB : A seesion bean is a type of EJB that created and destroyed by EJB client

                and is usually associated with one client.

                It can be stateless of stateful

b)Entity EJB : Entity EJB is the type of bean that can be assocaiated with more than

               one client and it is always stateful.

c)Message Driven EJB :This EJB is started by a message sent by Java Message Service


Conclusion:
An Enterprise Java Bean is a Server side component of J2EE applications that can be used alone or with other EJB to execute the business logic on the J2EE server.



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