EJB 3.0 : Stateless Session Bean

• What is Stateless Session Bean?
• Example for Stateless session Bean

Stateless session EJBs have the following behaviour:

• provide a single use service
• do not maintain state on behalf of the client
• are relatively short lived
• do not survive EJB server crashes
• any two instances of the same stateless session EJB type are always identical
• each instance can be shared by multiple clients

When to use Session Beans?

Session beans are typically used for business process or control logic that spans multiple entity beans

Life Cycle of Stateless Session Bean

• Does not Exist
• Ready State

Interaction between Client, Bean instance, Container for Stateless Session Bean

Sequence of Operations initiated by Client

• Client calls a create() method on the home object
• Home object requests a bean instance from a pool, home object returns EJB object to client
• Client calls business methods on EJB object
• EJb object passes the call to Bean instance
• Client calls remove() on the EJB object
• EJB object releases bean instance

Sequence of Operations initiated by Container (independent from Client action)

• Create Bean instance
• Container calls setSessionContext() of the bean
• Container calls ejbCreate() of the bean
• Container calls ejbRemove() of a bean
• remove

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Stateless Session Bean Deployment

Now Start The Weblogic Server 10

Now, Start the Weblogic Server Administrator console.

http://localhost:7001/console

Run the Client Program to test your Stateless Session bean deployed on weblogic server.