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Using joinTransaction() on resource-local entity managers.

 
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What will happen if we use the joinTransaction() method on a resource-local EntityManager?
 
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What do you expect to happen ?
 
Treimin Clark
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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
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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
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Thanks Ralph.
 
Consider Paul's rocket mass heater.
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