Re: [cdi-dev] What about @AsyncObserves ?

So it seems impossible to avoid opt-in on the observer side

Le 19 mars 2015 à 15:51, Romain Manni-Bucau <rmannibucau(a)gmail.com&gt; a écrit : sounds like a quick and dirty solution to me. @Async will arrive Yes like in “Async is coming” ;) - maybe too early today - but adding @ObservesAsync just cause we dont have yet @Async will make this API obselete pretty quickly isn't it (already cause of EJB actually). and if we add an @Async in our spec you think it’s better ? Do we really want this feature at this price? #1 requested feature by users. If yes *AsyncObserves *sounds an acceptable compromise but still will mess up the API IMO. The question is “Is it more or less messy than @Async @Observes?" I don’t know… It has pros and cons as I listed... Romain Manni-Bucau @rmannibucau <https://twitter.com/rmannibucau> | Blog <http://rmannibucau.wordpress.com/> | Github <https://github.com/rmannibucau> | LinkedIn <https://www.linkedin.com/in/rmannibucau> | Tomitriber <http://www.tomitribe.com/> 2015-03-19 15:36 GMT+01:00 Antoine Sabot-Durand <antoine(a)sabot-durand.net&gt; : > Hi guys, > > > So it seems impossible to avoid opt-in on the observer side for the sake > of awkward compatibility. > Adding a member to @Observes could also be a source of issues when old > CDI lib will be used with CDI 2.0 runtime. Some of us (including me) don’t > want to add an @Async annotation to CDI spec, so perhaps we should add an > async alternative to @Observes with an @AsyncObserves or @ObservesAsync ? > > So it would be > > public void myObserver(*@AsyncObserves* payload) {} > > instead of > > *@Async* > public void myObserver(@Observes payload) {} > > > Pros : > - it’s a cleaner way to manage the opt-in than to put 2 annotations or > add a member to an existing one > - it could have new members related to async behavior (context > propagation, concurrent scenario, etc…) > - As it won’t be in legacy code no risk to see old observers called > asynchronously > > Cons : > - Still not clear for users when fire() is called to see @AsyncObserves > launched synchronously > - Yet another annotation added > > wdyt ? > > Antoine > > _______________________________________________ > cdi-dev mailing list > cdi-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/cdi-dev > > Note that for all code provided on this list, the provider licenses the > code under the Apache License, Version 2 ( > http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas > provided on this list, the provider waives all patent and other > intellectual property rights inherent in such information. > _______________________________________________ cdi-dev mailing list cdi-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/cdi-dev Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 ( http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.