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 google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.