Help me regarding basics of E.J.B

[mahudees waran]

i am new to E.J.B ,i have a doubt that whether ejb-jar file must exactly contain only one HOME , COMPONENT interfaces and only one BEAN class.Also BEAN class is not implementing COMPONENT interface then how it can be able to implement the COMPONENT interface?.

[Christophe Verré]

In the deployment descriptor, you tell the container which is the home interface and which is the component interface.

[Mahesh Desai]

According to the spec, we must provide one of the following combinations for certain session/entity bean in ejb-jar.xml file:


1. Local home interface + Local component interface + Bean Class
2. Remote home interface + Remote component interface + Bean Class
3. Local home interface + Local component interface + Remote home interface + Remote component interface + Bean Class

(Note: No other combination is valid.)


The bean class does not implement component interface directly. The corresponding container-generated EJBObject code implements this interface and delegates to the enterprise bean. The EJBObject acts as a proxy, intercepts the remote object invocations and calls the appropriate methods on the enterprise Bean instance.


Thanks,
Mahesh

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SCJP 1.4 |SCWCD 1.4 | SCBCD 1.3 | SCEA Part I - In Progress

[mahudees waran]

thank's a lot guy's