How to deal with JDOException in managed environment?

Question

In the managed environment, one can use bean-managed transaction
(javax.transaction.UserTransaction) to demarcate the tran, but when the
tran commit, JDO may generate some exception to indicate something make
the commit impossible(Primary key conflict(JDOFataDataStoreException, Data
be changed before commit(JDOUserException) etc.), but the UserTransaction
only generate the RollbackException or other, not the JDO exception, and
there is no way to get the real exception from the RollbackException, but
sometime, I must do something according to the exception, how can I do?
One way is use javax.jdo.Transaction, but I don't know is it apropriate to
use this, and is there any side effect to use this?

Answer 1

But can I use javax.jdo.Transaction instead of javax.jdo.UserTransaction?
Patrick Linskey wrote:
The fact that you can't perform application-specific handling of
commit-time exceptions is a bit of an annoyance that the EJB CMT spec
presents.
Kodo provides an API to allow incremental flushing of data to the
database, which you can use to help catch some exceptions before commit
time. However, note that this is not foolproof -- depending on how your
database deals with various exceptions and integrity checking, you may
still see some exceptions at commit time instead of at flush time.
For details, see the JavaDoc for the
com.solarmetric.kodo.runtime.PersistenceManagerImpl.flush() method.
-Patrick
On Mon, 09 Jun 2003 02:33:01 +0000, maguohai wrote:
In the managed environment, one can use bean-managed transaction
(javax.transaction.UserTransaction) to demarcate the tran, but when the
tran commit, JDO may generate some exception to indicate something make
the commit impossible(Primary key conflict(JDOFataDataStoreException, Data
be changed before commit(JDOUserException) etc.), but the UserTransaction
only generate the RollbackException or other, not the JDO exception, and
there is no way to get the real exception from the RollbackException, but
sometime, I must do something according to the exception, how can I do?
One way is use javax.jdo.Transaction, but I don't know is it apropriate to
use this, and is there any side effect to use this?
Patrick Linskey
SolarMetric Inc.