[cdi-dev] [JBoss JIRA] (CDI-541) Ordering of async observers (vs sync observers) is not specified

[Martin Kouba (JIRA)]

    [ https://issues.jboss.org/browse/CDI-541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13119276#comment-13119276 ] 

Martin Kouba commented on CDI-541:
----------------------------------

+1 For this proposal.

> Ordering of async observers (vs sync observers) is not specified
> ----------------------------------------------------------------
>
>                 Key: CDI-541
>                 URL: https://issues.jboss.org/browse/CDI-541
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>          Components: Events
>    Affects Versions: 2.0-EDR1
>            Reporter: Tomas Remes
>
> I think this needs to be specified. E.g. what happens if I fire async event and have more matching sync and async observers? Are all sync observes called first in given order with no regard to async observers priority? 
> For example:
> {{event.fireAsync(new Message());}}
> {code}
> public class First {
>   
>    void observeMessage(@Observes @Priority(2000) Message message){} 
> }
> {code}
> {code}
> public class Second {
>   
>    void observeMessage(@ObservesAsync @Priority(2100) Message message){} 
> }
> {code}
> {code}
> public class Third {
>   
>    void observeMessage(@Observes @Priority(2200) Message message){} 
> }
> {code}
> {code}
> public class Fourth {
>   
>    void observeMessage(@ObservesAsync @Priority(2300) Message message){} 
> }
> {code}
> What will be the order in this case? First, Third, Second, Fourth?



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