[jboss-user] [JBoss Seam] - Re: Warning: do not use Seam managed pesistent context for B

[koenhandekyn]

The good news is that indeed, a joinTransaction() call does the job with @In injected entityManager. 

anonymous wrote : Of course the @Injected EM will not join the transaction automatically because the transaction is started AFTER injection, when the method is called

i think i understand your remark: seam injection occurs just in front of each method invocation and the transasction is only started in the method! 

however, @PersistenceContext injection occurs somewhere at bean creation and even earlier if i understand well. 

so while I think I understand the seam behaviour now (joining makes sense),  i'm still confused why i don't have to do a joinTransaction with @PersistenceContext injected entityManager (where does the join happen?) and why the behaviour should be different.

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