[cdi-dev] [VOTE] Using @Priority to order events instead of adding a parameter in @Observes

John D. Ament john.d.ament at gmail.com
Tue Oct 28 07:48:53 EDT 2014

-1 (vote for a param in @Observes)

The reason being, it sounds like there's a lot of unknowns/gaps with trying
to do #1.  Plus only part of 250 ships with the JVM, as the rest of it
comes from the EE spec:

On Tue, Oct 28, 2014 at 4:56 AM, Antoine Sabot-Durand <
antoine at sabot-durand.net> wrote:

> To add events ordering feature we have two choices:
> 1) Use @Priority from common annotation specification (JSR-250)  (vote +1)
> pros:
> - more consistent with other ordering mechanism we already have in CDI
> (Interceptors, decorators, Alternatives)
> - more Java EE consistent
> cons:
> - time consumed in JSR 250 MR participation (@Priority must be update to
> support parameter for target)
> - as @Priority is not part of Java SE, CDI light on java SE will have to
> add the jsr250 jar as dependency only to have this annotation (which will
> make it a little less light)
> 2) Add a parameter to @Observes annotation to give order to an observer
> (vote -1)
> pros:
> - works out of the box (we can add this property without ask for other
> specs modification)
> - avoid two annotations to declare an ordered observer (simpler usage)
> cons:
> - less Java EE spirit
> - could be seen as an inconsistency with the way we order Interceptors,
> Decorators and Alternatives.
> ————————————————————
> Who can vote?  Everybody registered to this ML can vote. All votes will be
> binding
> How to vote? Answer this mail and vote +1 (for @Priority) 0 or -1(for
> parameter in @Observes)
> Vote will be closed in 72 hours
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