[mod_python] Question on Transactions

Robert Lilly rclilly at cox.net
Sat Feb 7 11:25:21 EST 2004

> [mailto:mod_python-bounces at modpython.org]On Behalf Of jalil
> Sent: Saturday, February 07, 2004 10:28 AM
> Subject: [mod_python] Question on Transactions
> I am looking for a clean way to create a transaction and use it across
> multiple method calls. For example, method A calls B and C. B updates a
> row successfully but C fails. I like A to abort changes made by B. I
> thought about doing it by passing a connection created in A to B and C
> so I can rollback if needed in A. But I don't like this approach.  I
> like B to creates its own connection but join the transaction that
> already started by A (or somehow get the same connection) or use its own
> transaction context (or a new connection) if none there.
> I wonder how other people do this using Python.
> Thanks,
> -Jalil

Jalil, is this a database transaction? It sounds like the Atomicity part of
the ACID test for DBMSes where when a transaction that updates the database
occurs, either all of the update occurs, or none of the update occurs, even
if a hardware or software failure occurs during the transaction.

I'm not sure how DBMSes accomplish this, but maybe the same principle would
work for you.

Sorry I'm not of much help, but maybe this will assist others to get a
better idea of your situation.


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