Sounds promising... Should say that I didn't know about the backend service so far. I'm starting with GAE, but with a non trivial problem, instead of a hello world :-)
Now I just need to be able to update my timers in a second by second fashion (there are situations where I need to restart them). As far as I could see, Thread.sleep( 1000 ) should not be a problem... Thanks for the advice Bruno! On Mon, Jun 27, 2011 at 1:35 PM, Bruno Fuster <brunofus...@gmail.com> wrote: > Right... > > I'm not sure but you could use the increment method from MemcacheService to > atomically update this value each second from a single machine (backends) > and read that from your dynamic instances constantly using ajax. > > > http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/memcache/MemcacheService.html#increment(java.lang.Object, > long) > > > > On Mon, Jun 27, 2011 at 1:08 PM, lorenoolive...@gmail.com < > lorenoolive...@gmail.com> wrote: > >> I thought on this, but I think this works fine only if I have just one >> running copy of my application. If I have two or more (because the workload >> can be high), they can be out of sync regarding their local clocks. Thus, >> requests that arrive at approximately the same time at the different >> instances, can get a different value to the "second" variable... >> >> >> >> On Mon, Jun 27, 2011 at 12:58 PM, Bruno Fuster <brunofus...@gmail.com>wrote: >> >>> You could just put this countdown date into your cache (or even a static >>> property if it won't change) and calculate the seconds easily using >>> jodatime >>> >>> int seconds = Seconds.secondsBetween(new DateTime(), >>> cache.get(countdownDate)).getSeconds(); >>> >>> After that, use javascript intervals to recalculate the countdown while >>> the user is at your page instead of consuming some services on your >>> back-end. >>> >>> >>> >>> >>> On Mon, Jun 27, 2011 at 12:48 PM, lorenoolive...@gmail.com < >>> lorenoolive...@gmail.com> wrote: >>> >>>> Is it possible to implement a global count down timer in GAE/J? I would >>>> like an unique timer to be shared among all the application instances. The >>>> precision of the timer is seconds. >>>> >>>> Any idea? >>>> >>>> -- >>>> 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. >>>> >>> >>> >>> >>> -- >>> Bruno Fuster >>> >>> -- >>> 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. >>> >> >> -- >> 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. >> > > > > -- > Bruno Fuster > > -- > 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. > -- 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.
