Using joinTransaction() on resource-local entity managers.

[Treimin Clark]

What will happen if we use the joinTransaction() method on a resource-local EntityManager?

[Ralph Jaus]

What do you expect to happen ?

[Treimin Clark]

Ralph Jaus wrote:What do you expect to happen ?

I expect a runtime exception or transaction rollback or something like that. Because the resource-local EntityManager uses EntityTransaction and it couldn't be joined to the active JTA Transaction. Am I correct? Please tell me what will really happen here?

[Ralph Jaus]

Hi Treimin,

I did a test using glassfish/toplink and the result was

Message ID: javax.persistence.TransactionRequiredException

Complete Message: joinTransaction has been called on a resource-local EntityManager which is unable to register for a JTA transaction.

But I'm not aware if it is specified in the JPA spec which exception exactly (e.g. TransactionRequiredException or IllegalStateException) has to be thrown here.

[Treimin Clark]

Thanks Ralph.