Confused about the role of ejbc in Weblogic 7

Howdy All
Here is my understanding of the role of ejbc in Weblogic 7:
* Let's assume I have a JAR containing an EJB (let's say a stateless session bean).
Let's call this the no-ejbc-JAR.
1. I run the no-ejbc-JAR through ejbc to create the container-ejbc-JAR which can
now be deployed in Weblogic.
2. I can run ejbc against the no-ejbc-JAR to create a client-ejbc-JAR for use
by clients wishing to access and use the EJB.
Questions...
MUST I run the no-ejbc-JAR through ejbc (to create the container-ejbc-JAR) before
it can be deployed in Weblogic 7?
If so, why?
I can sort of see why this may be necessary from the containers perspective, although
I would have thought the ejbc process could have been automatically applied by
Weblogic to no-ejbc-JARs being deployed.
But I am confused as to why ejbc would need to be used to create a client-ejbc-JAR.
From the client's perspective, isn't it simply enough to have the no-ejbc-JAR
(or a subset of the no-ejb-JAR) containing the EJB home and remote interfaces
(along with any non-ejbc generated support classes)? For use by the client, why
would it be necessary to run the no-ejbc-JAR through ejbc to create a client-ejbc-JAR?
Or do I have an incorrect understanding of the role of ejbc?
Thanks,
Rob

Hello Rob,
I will try to clarify a couple of your concerns. First of all, if your EJB jar
contains CMP 2.0 entity beans, the underlying JDBC implementations must be generated
for your respective abstract classes of the entity beans. EJBC will generate this
for you automatically. Also, the EJBC utility generates all of the other necessary
server classes that WebLogic requires for deploying your EJBs (such as custom
code for handling transactions, security, and other EJB services). When your EJB
utilizes remote home/component interfaces, the utility will also generate all
of the necessary client-side proxy and server-side byte code by running the RMI
compiler on your EJBs. In addition to the above code generation that takes place,
EJBC also checks all of your EJBs and makes sure that they are written according
to the EJB specification. This way you will always be sure that your EJBs will
be deployable on BEA WebLogic if EJBC returns with no error messages. You also
asked if EJBC must be run manually before deploying the EJBs. If you run your
application in exploded directory format, WebLogic will automatically invoke the
EJBC utility prior to deploying your EJBs. Please refer to the links below for
more information about the EJBC utility as well as deploying your application
in exploded directory format:
http://edocs.bea.com/wls/docs70/ejb/EJB_utilities.html#1075296
http://edocs.bea.com/wls/docs70/programming/deploying.html#1125152
Also, feel free to examine the code that EJBC generates to gain a better feel
for what's happening behind the scenes. Also, please be aware that ejbc has been
deprecated in WebLogic 8.1, in favor of the appc utility:
http://edocs.bea.com/wls/docs81/ejb/EJB_tools.html#1096936
Best regards,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
"Rob Young" <[email protected]> wrote:
>
Howdy All
Here is my understanding of the role of ejbc in Weblogic 7:
* Let's assume I have a JAR containing an EJB (let's say a stateless
session bean).
Let's call this the no-ejbc-JAR.
1. I run the no-ejbc-JAR through ejbc to create the container-ejbc-JAR
which can
now be deployed in Weblogic.
2. I can run ejbc against the no-ejbc-JAR to create a client-ejbc-JAR
for use
by clients wishing to access and use the EJB.
Questions...
MUST I run the no-ejbc-JAR through ejbc (to create the container-ejbc-JAR)
before
it can be deployed in Weblogic 7?
If so, why?
I can sort of see why this may be necessary from the containers perspective,
although
I would have thought the ejbc process could have been automatically applied
by
Weblogic to no-ejbc-JARs being deployed.
But I am confused as to why ejbc would need to be used to create a client-ejbc-JAR.
From the client's perspective, isn't it simply enough to have the no-ejbc-JAR
(or a subset of the no-ejb-JAR) containing the EJB home and remote interfaces
(along with any non-ejbc generated support classes)? For use by the client,
why
would it be necessary to run the no-ejbc-JAR through ejbc to create a
client-ejbc-JAR?
Or do I have an incorrect understanding of the role of ejbc?
Thanks,
Rob

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