setRollbackOnly()

Hi,
I have a question.
I have a stateless session bean.
I want to rollback the transaction when an application exception occured.
There are two options to do.Please let me know which one would be better.
Option 1:
try{
//perform database operation}
catch(DataAccessException ex){
getSessionContext().setRollbackOnly()
}
Option 2:
try{
//perform database operation}
catch(DataAccessException ex){
throw new EJBException(ex);
}

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