I think I just found a "bug" ... LoadableDetachableModel is potentially non-threadsafe.
I experience weird behavior, my concurrent models are chained (i.e. calls other models getObject()), and my concurrent models extend LoadableDetachableModel. The weird behavior is that sometimes (!!) the models return null. But if debugged, they're not null. It's like a timing and race condition problem. Now I think I know why. LoadableDetachableModel, upon getObject(), sets attached=true before caling load(), which can take some time. If getObject() gets called again, it then immediately returns the "loaded object", which was still null (sometimes.....). Should I report this as bug? On Wed, Dec 26, 2012 at 6:14 PM, Siefart, Olaf [via Apache Wicket] < ml-node+s1842946n4655056...@n4.nabble.com> wrote: > Hi, > > A dashboard with unrelated web services is exactly the usecase of our > christmas project (https://github.com/osiefart/wicket-christmas). > > @Hendy: I would not start the execution immediately upon model creation. I > would choose a Visitor - onConfigure - Solution. Then it is possible to > check the visibility of the component before loading data... > > Kindly regards, > Olaf > > -----Ursprüngliche Nachricht----- > Von: Serban.Balamaci [mailto:[hidden > email]<http://user/SendEmail.jtp?type=node&node=4655056&i=0>] > > Gesendet: Mittwoch, 26. Dezember 2012 11:45 > An: [hidden email] <http://user/SendEmail.jtp?type=node&node=4655056&i=1> > Betreff: Re: Are Wicket models loaded concurrently ? > > Hello guys. > For sure this would be useful. I encountered many cases where the models > are using different unrelated web services and starting the requests in > parallel would be a nice improvement. > > > > -- > View this message in context: > http://apache-wicket.1842946.n4.nabble.com/Are-Wicket-models-loaded-concurrently-tp4655046p4655055.html > > Sent from the Users forum mailing list archive at Nabble.com. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [hidden > email]<http://user/SendEmail.jtp?type=node&node=4655056&i=2> > For additional commands, e-mail: [hidden > email]<http://user/SendEmail.jtp?type=node&node=4655056&i=3> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [hidden > email]<http://user/SendEmail.jtp?type=node&node=4655056&i=4> > For additional commands, e-mail: [hidden > email]<http://user/SendEmail.jtp?type=node&node=4655056&i=5> > > > > ------------------------------ > If you reply to this email, your message will be added to the discussion > below: > > http://apache-wicket.1842946.n4.nabble.com/Are-Wicket-models-loaded-concurrently-tp4655046p4655056.html > To unsubscribe from Are Wicket models loaded concurrently ?, click > here<http://apache-wicket.1842946.n4.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=4655046&code=aGVuZHlAc29sdXZhcy5jb218NDY1NTA0NnwxNTI0Njc4NzUy> > . > NAML<http://apache-wicket.1842946.n4.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> > -- Hendy Irawan - on Twitter <http://twitter.com/hendybippo> - on LinkedIn<http://id.linkedin.com/in/hendyirawan> Web Developer | Bippo Indonesia <http://www.bippo.co.id/> | Akselerator Bisnis | Bandung -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/Are-Wicket-models-loaded-concurrently-tp4655046p4655067.html Sent from the Users forum mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
