Exception Handling in EJB Transactions. 2004-02-24 - By Kalra, Ashwani
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>-- --Original Message-- --
>From: Basava Rajesh [mailto:Basava.Rajesh@(protected)]
>Sent: Tuesday, February 24, 2004 12:03 PM
>To: J2EEPATTERNS-INTEREST@(protected)
>Subject: Re: Exception Handling in EJB Transactions.
>
>
>hi,
>
>thanks for the quick response.
>Dont u think its a overhead in every method to catch the Application
>Exception and do a setRollBackOnly() ?
Overhead is not there for catching, but for throwing exception. so dont
worrry about that.
>This could be avoided by creating Application Exception extending the
>EJBException and hence the container takes care of rolling back the
>transactions.
in this case you dont have the choice of retrying the transaction. Since its
application exception, you can retry the Tx.
But if you extend EJBException, it will become SystemException, and it will
always be rolled back by container.
>
>thanks n regards,
>Rajesh
>
>-- --Original Message-- --
>From: Kalra, Ashwani [mailto:ashwani.kalra@(protected)]
>Sent: Tuesday, February 24, 2004 11:45 AM
>To: J2EEPATTERNS-INTEREST@(protected)
>Subject: Re: Exception Handling in EJB Transactions.
>
>
>Inline....
>
>>-- --Original Message-- --
>>From: Basava Rajesh [mailto:Basava.Rajesh@(protected)]
>>Sent: Tuesday, February 24, 2004 11:28 AM
>>To: J2EEPATTERNS-INTEREST@(protected)
>>Subject: Exception Handling in EJB Transactions.
>>
>>
>>Hi,
>> The EJB 2.0 specification states that if an
>>EJBException is thrown,
>>the container shall rollback the transaction while for
>>Application level
>>Exceptions, the container does not. But since EJBException is a
>>RuntimeException(and thus is not checked), should the
>>Application Exceptions
>>thrown in the Data/Business layer extend EJBException??
>
>They should be descendent of Exception classes
>
>>Or do
>>we catch the
>>Application Exceptions and do a manual context.setRollbackOnly().
>Yes , when ever in doubt of data integrity, do it.
>>
>> What would be the best way to handle rollback of
>>Transactions when
>>Application Exceptions are thrown?
>
>do context.setrollback or retry. then throw that exception to client if
>could not succeed.
>
>
>>TIA,
>>Rajesh.
>>
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