[cdi-dev] [JBoss JIRA] (CDI-20) @Observes(propagate = false) - stop event propagation after being handled by an observer

Christian Beikov (JIRA) jira-events at lists.jboss.org
Tue Oct 9 11:20:03 EDT 2012


    [ https://issues.jboss.org/browse/CDI-20?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12725033#comment-12725033 ] 

Christian Beikov commented on CDI-20:
-------------------------------------

I am not sure whether deltaspike already ported all of the ideas of seam catch, but I only know deltaspike so I can't speak of catch. Anyway, deltaspike did a good job with the exception event chaining which should IMO also be available for CDI events. Especially for this problem something like an event context where one could set a flag, that the current event is handled or so, would be nice.
                
> @Observes(propagate = false) - stop event propagation after being handled by an observer
> ----------------------------------------------------------------------------------------
>
>                 Key: CDI-20
>                 URL: https://issues.jboss.org/browse/CDI-20
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>          Components: Events
>    Affects Versions: 1.0
>         Environment: any
>            Reporter: Walter White
>             Fix For: TBD
>
>
> I would like to have the ability to stop event propagation after it is handled by any observer only for certain situations.  Is it possible to add a property to the annotation indicating whether the propagation should continue after being handled by the observer?  Alternatively, would it be more concise to add a qualifier annotation which specifies the propagation.

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