Have you looked into Memcache's INCR? http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/memcache/MemcacheService.html#increment(java.lang.Object, long)
This'll do it atomically, but you run the risk of it being volatile, so you'll have to account for that in your client code. On Tue, Mar 2, 2010 at 11:40 PM, legendlink <gregc...@gmail.com> wrote: > hi, i wanted to have a sequence generator that increments by x value > everytime it generates a value. if i would create the sequence > generator by using the datastore, it is likely that data contention > would occurr if there is high access times. > > i have looked into the sample code of max ross in the google code > repository (SequenceExamplesJDO.java) and think this is limited to > increment by 1 only and not increment by x value. > > if sharding technique is used, my concern is that i might not get the > right sequence. > > what is the best/elegant way of doing sequence generator that > increments x value? > > -- > 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. > > -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- 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.
