Hi, OK, that makes sense. How could I make a GAE mail handler idempotent? Is there any unique identifier associated with an inbound email that I can reference, or will I truly need to build the ".equals" logic to analyze the email elements (including attachments) to know if it is a duplicate?
thanks MG On Dec 12, 2010, at 11:34 PM, Didier Durand wrote: > Hi, > > Yes, your code gets (probably) executed more than once because it is > scheduled as a task in a task queue defined in the architecture of > GAE. > > As such your code as to be idempotent (the word you were looking for) > because it can be executed multiple times: Google highly recommend to > guarantee to work on a true idempotence of the code in such cases. > > regards > > didier > > On Dec 12, 10:22 pm, Max <[email protected]> wrote: >> Hi, >> >> My application receives emails and performs duties based on the content of >> the email. I'm sometimes having an issue (< 5%) where a single email that >> goes in to the application causes the handler to execute twice. Is this an >> issue with GAE that would be intended to be fixed? Or is the nature of the >> environment one that requires writing code that can be executed multiple >> times without negative consequences (can't remember the word for this)? >> >> If I need to write code to support running multiple times over the same >> inbound email, are there any suggestions on how to manage this? I'm >> assuming I'd need to come up with an ".equals" method that makes sure it >> isn't a repeat of a prior message. Any advice? >> >> thanks! >> MG > > -- > 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. > -- 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.
