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JTA UserTransaction rollback does not work

 
Olga Wsdf
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I try to describe my environment shortly. Technologies: EJB 3.1, JSF, JBoss 7.1.1

There are Servise-classes (@SessionScoped @Stateful). Servise-classes call Dao classes (@Stateless)

I want :
- use EntityManager only into @StateLess beans (Dao)
- have short transaction in most cases (like persist, merge)
- have one long transaction for some multistep-methods (methods are in Dao also)
- have actual (up to date, without first-level cache) data[

I have: Pesistense.xml


Dao

Problem: If it is throw an Exception into Dao method, part data will save in DB instead of total rollback.

I think, is need Join Transaction to EM. Or disconnect persists each item to the DB right away (using cache). I've try different ways, but didn't have success.

Thanks for in advance!
 
It is sorta covered in the JavaRanch Style Guide.
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