Does WLS 6.1 support EJB2.0

[Jane Somerfield]

Hi,
Does WLS6.1 support CMR, MDB?

[GCSAA]

Yes,
It support EJB2.0
including CMR and MDB

[Chris Mathews]

It is important to note that WebLogic 6.1 is not certified on J2EE 1.3, so some areas of their spec support may be shaky.
Rick Hightower has said he ran into some problems with CMP on 6.1. I use both CMP and MDBs and have not run into any problems but that is not to say that they aren't there.

[Jane Somerfield]

Thanks.
What is the difference between 6.1 and 7.0?

[Rahul Mahindrakar]

http://edocs.bea.com/platform/docs70/interm/whatsnew.html
This may help you out on whats new in Weblogic 7.0.
One of the significant changes is Weblogic 7.0 is J2EE 1.3 compliant and that there have been significant changes in Security and Webservices implementation.
Weblogic 6.x by default does not support 2.0 ejb. You need to download a jar file through which the support for ejb 2.0 was provided. But if I rember right bea stated that this implementation is not production worthy, though we are using it in production.

[Rick Hightower]

Rick Hightower has said he ran into some problems with CMP on 6.1. I use both CMP and MDBs and have not run into any problems but that is not to say that they aren't there.

I did run into some problems. But, I was trying every possible combination of EJB QL statements. I've gotten some simple EJB 2.0 CMP stuff to work in WebLogic six. However, I suggest upgrading to 7 if you are going to be using EJB 2.0.

[John King]

I'm using CMR with WLS6.1SP3 and found the
following problems for one-to-many
unidirectional relationships:
A DEPARTMENT can have many COURSEs that can also many STUDENTs.
The tables in DB is something like:
DEPARTMENT table has an ID as its primary key,
COURSE_ID as foreign key, and other data
columns.
COURSE table has an ID as its primary key,
STUDENT_ID as foreign key, and other data
columns.
STUDENT table has an ID as its primary key
and other data columns.
I'm using compound primary keys for DEPARTMENT
CMR entity bean and COURSE CMR entity bean.
For DEPARTMENT CMR bean I have DepartmentPK
that contains ID and CourseID.
For COURSE CMR bean I have CoursePK
that contains ID and StudentID.
It worked fine for the relationship between
DEPARTMENT and COURSE. When I added the
relationship between COURCE and STUDENT and
ran weblogic.ejbc, I got following errors:
"In relationship 'Course-Student',
role 'Student-belongs-to-Course', a
weblogic-relationship-role element contains
the wrong number of column mappings. A single
column mapping must be given for each primary
key column in the bean referenced by the mapping."
But I have mapped them in my
weblogic-cmp-rdbms-jar.xml deployment descriptor
as:
...
<weblogic-rdbms-relation>
<relation-name>Course-Student</relation-name>
<weblogic-relationship-role>
<relationship-role-name>Student-belongs-to-Course</relationship-role-name>
<column-map>
<foreign-key-column>STUDENT_ID</foreign-key-column>
<key-column>ID</key-column>
</column-map>
</weblogic-relationship-role>
</weblogic-rdbms-relation>
...
Is this a bug in WLS6.1SP3 because it is not
certified for EJB2.0? Or did I do something
wrong?
Thanks.