AFAIK there is no (simple) way to turn requests with undefined result into idempotent tasks. I've been struggling to execute gdata insert requests in a transaction as they may return with a timeout. It would be very nice if google would provide the standard services in an idempotent manner.
On 10 Jul., 18:43, Marcus Brody <[email protected]> wrote: > Hello, > > I would like to ask, if there is some way how to send mail only in > case that some db transaction will be successful. > I am not very experienced with gae, but I did study it now for about 2 > weeks. > > Desired output: > > 1) prepare email > 2) db transaction.begin() > 3) do some db operation > 4) bind sending mail with current transaction (similar to > how can you can attach Task to queue) > 5) db transaction.commit() > > I am aware that I can queue mail sending task to task queue, but i > cannot find the way how to do that mail sending task Idempotent > without (i think) complicated locking mechanism . > Most simple solution would be to put mail sending task to task queue, > but this means mail could be send twice in some rare situation. (this > is maybe not that bad but if there is some way how to avoid it, I > would like to know) > > Thank you, > > Marcus -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
