[cdi-dev] Async events. We need ideas to improve CDI-499
jharting at redhat.com
Tue Feb 3 03:39:09 EST 2015
We should enumerate all the arguments supporting async flag on an
observer. So far I have only seen one:
- an observer accessing @RequestScoped state would no longer be able to
do so since it would be run in a worker thread
I am eager to hear more arguments as this single one may not be enough
to justify the observer-async-flag design decision.
Remember that introducing fireAsync() itself does not break any existing
application because existing applications are using fire(). It's when an
existing application / library is modified to use fireAsync() when the
problem may occur. Such change should not be done blindly. As with any
other change, an author should consider possible consequences of the
change. Clearly documenting the fact that fireAsync() processing is done
in a different thread with a different @RequestScoped state may be
On 02/02/2015 03:43 PM, Antoine Sabot-Durand wrote:
> Hi all,
> https://issues.jboss.org/browse/CDI-499 comes after a lot of
> discussion about async events.
> I think the solution exposed here is quite satisfying, yet the idea to
> need to activate async behaviour on the observer side doesn’t please a
> lot of us. It’ll be confusing for users to have to activate async from
> the firing end and consuming end to see it work :-(.
> I’d like to see alternative proposal to have this new feature as user
> friendly as possible and keep the retro-compatibility aspect. We
> should find a better solution on our next meeting on wednesday.
> cdi-dev mailing list
> cdi-dev at lists.jboss.org
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