Each app instance runs in its own JVM. So it should be safe to cache data in ThreadLocal.
On 16 sep, 09:08, Maxim Veksler <ma...@vekslers.org> wrote: > I would like to cache a not thread safe object, I'm hoping to improve > performance by caching it instead of instantiating new instance per request. > > Thanks, > Maxim. > > On Thu, Sep 16, 2010 at 8:12 AM, Guillaume Laforge <glafo...@gmail.com>wrote: > > > > > What kind of data or information do you want to share through thread-locals > > between threads/requests? > > > On Thu, Sep 16, 2010 at 08:04, Maxim Veksler <ma...@vekslers.org> wrote: > > >> I didn't say multi threaded. > > >> ThreadLocal gives access to the cached object of the current thread. > >> I'm doing an assumption here that appengine/j is implemented with thread > >> per incoming request. > > >> What I would like to know is if these threads are recycled (in which case > >> ThreadLocal is a good approach) or not. > > >> Thanks, > >> Maxim. > > >> On Thu, Sep 16, 2010 at 6:17 AM, Didier Durand > >> <durand.did...@gmail.com>wrote: > > >>> Hi Maxim, > > >>> Multi-threading is not the way to go under GAEJ, see > >>>http://code.google.com/appe<http://code.google.com/appengine/docs/java/runtime.html#The_Sandbox> > > >> *I didn't say multi threaded. * > > >> ngine/docs/java/runtime.html#The_Sandbox<http://code.google.com/appengine/docs/java/runtime.html#The_Sandbox> > > >>> The right way to go is Tasks: > >>>http://code.google.com/appengine/docs/java/taskqueue/overview.html > > >>> regards > > >>> didier > > >>> On Sep 15, 2:00 pm, Maxim Veksler <ma...@vekslers.org> wrote: > >>> > Hello, > > >>> > I'm wondering (after some internal discussion we had) is using > >>> ThreadLocal > >>> > for applications running on the AppEngine is performance beneficial ? > > >>> > For this to work AppEngine should recycle threads, right? > > >>> > Another question is how many threads does the appengine allows per JVM > >>> ? > >>> > Such ThreadLocal based approach would (probably) be inefficient if the > >>> JVM > >>> > allowed 20000 threads. > > >>> > Help is appreciated. > >>> > Maxim. > > >>> -- > >>> 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<google-appengine-java%2B > >>> 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-j...@googlegroups.com. > >> To unsubscribe from this group, send email to > >> google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2B > >> unsubscr...@googlegroups.com> > >> . > >> For more options, visit this group at > >>http://groups.google.com/group/google-appengine-java?hl=en. > > > -- > > Guillaume Laforge > > Groovy Project Manager > > Head of Groovy Development at SpringSource > >http://www.springsource.com/g2one > > > -- > > 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<google-appengine-java%2B > > 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-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.
