Re: [Springframework-developer] DeadlockLoserDataAccessException vs CannotAcquireLockException

[Juergen H. <ju...@in...>]

FYI, we already do throw OptimisticLockingFailureException for Hibernate and
JDO since the beginning of time :-)

PessimisticLockingFailureException as superclass for
CannotAcquireLockException and co sounds appropriate to me. Do we want to
include this in 1.2 RC1, which was originally scheduled for today? ;-) It
looks like 1.2 RC1 won't be released before Wednesday anyway.

Juergen


-----Original Message-----
From: spr...@li...
[mailto:spr...@li...]On Behalf
Of Rod Johnson
Sent: Monday, March 21, 2005 3:00 PM
To: spr...@li...
Subject: Re: [Springframework-developer]
DeadlockLoserDataAccessException vs CannotAcquireLockException


Thomas

> ConcurrencyFailureException
> '- TransactionLockingFailureException [X]
>     '- CannotAquireLockException [X]
>     '- CannotSerializeTransactionException [X]
>     '- DeadlockLoserDataAccessException [X]
> '- OptimisticLockingFailureException [X?]
>
> The [X] indicates that I think we should provide the option for separate
> categories in sql-error-codes.xml for this exception.  Some of the lower
> exception classes might not make sense for all databases, but
> TransactionLockingFailure and OptimisticLockingFailure will provide
> enough information to retry the transaction if the app developer want to
> do that.

I like this proposal. Though should it ben
PessimisticLockingFailureException to match
OptimisticLockingFailureException? Yes, the latter is intended to be
thrown by ORM tools, not JDBC-level operations. So we could convert from
whatever the ORM tool throws. Or developers could throw it themselves,
still allowing for consistent handling within Spring's DAO abstraction.

R
>
> Oracle might have these categories defined:
>     '- CannotAquireLockException [X]
>     '- CannotSerializeTransactionException [X]
>     '- DeadlockLoserDataAccessException [X]
>
> while MySQL might have this
> '- TransactionLockingFailureException [X]



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