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how to trace or debug EJB in the step by step mode?

kevin chang
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1.Cuz there is no response in my oracle database, server and client when i run my programme, i want to trace the programme in remote EJB. Is there any way to do that like execute client java codes step by step?
2.I am writing my CMP but got some confused about the database key and EJB key class. if i want to create a record , should i use codes in a session bean like this?

should i just set LEGID in Key Class while the other two field should not set to null in database?
Best Regards
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