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JavaRanch » Java Forums » Certification » EJB Certification (SCBCD/OCPJBCD)
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DD vendor specific

viswanadh kasinadhuni
Ranch Hand

Joined: Oct 14, 2003
Posts: 33
Just wanted to know why the DD are specific to each vendor. Is there any common way to write a DD which will be not vendor specific?

Pradeep bhatt
Ranch Hand

Joined: Feb 27, 2002
Posts: 8904

DD are vendor specific because the EJB container is implemented in different ways. Some (or every )containers provide extra features other than the one specfied in the spec.
Having a common DD would be difficult to achieve. As EJB evolves you will find more vendor specific feature becoming a standard and will fins its place in ejb-jar.xml. for e.g. EJBQL .
If you have a common DD it will be difficult for vendors to compete.
[ October 28, 2003: Message edited by: Pradeep Bhat ]

Sivasundaram Umapathy
Ranch Hand

Joined: Aug 10, 2002
Posts: 360
If everything is predefined and regulated by the spec,then the vendors will have a tough time to push their products as every other product will be the same

Co-Author - SCMAD Exam Guide - ISBN:9780070077881
Author - Java certification success, Part 4: SCEA
I agree. Here's the link:
subject: DD vendor specific
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