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Why EntityManager. joinTransaction is not needed for shared application managed JTA

 
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Hi, in chp 6 of JPA Pro, there is an example, sharingApplicationManagedJTA,




 
Himai Minh
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I modify another example from JPA PRO 2nd edition , chapter 6 's applicationManagedJTA example:
 
Himai Minh
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I modified the example again. It works without joinTransaction.


Reference:http://piotrnowicki.com/2012/11/types-of-entitymanagers-application-managed-entitymanager/.
 
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