On Aug 19, 5:00 am, PSL <psl.appengine.test.acco...@gmail.com> wrote: > Hi, > I want to implement aggregate functions like sum and avg in Java in > Google App Engine.
I don't know a good way to acomplish this in GAE right now. I think that having Asychronous URL fetches is one way that this could be done (this is a feature in the Python GAE API but not in the Java API). This feature would allow you to create a servlet that will calculate functions over a range of records. Then your method could break the job of calculating the function into jobs of 10000 records each. For example, for 50000 rows your method wouold issue 5 asychronous calls to the servlet that calculates the function, each call specifies a range a rows. Then the method would collection the result from each call and return the total. I have created a feature request for adding the Asychronous URL fetch to the Java API. Please go and 'star' this issue.... http://code.google.com/p/googleappengine/issues/detail?id=1899 --~--~---------~--~----~------------~-------~--~----~ 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-java@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 -~----------~----~----~----~------~----~------~--~---
