[cdi-dev] [JBoss JIRA] (CDI-729) Async event not CompletionStage friendly

[Matej Novotny (JIRA)]

    [ https://issues.jboss.org/browse/CDI-729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592659#comment-13592659 ] 

Matej Novotny commented on CDI-729:
-----------------------------------

[~rmannibucau] and what if you have multiple observers?
How does the chain proceed there? Who goes first, who second? What if both observers expect to go first.

> Async event not CompletionStage friendly
> ----------------------------------------
>
>                 Key: CDI-729
>                 URL: https://issues.jboss.org/browse/CDI-729
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>            Reporter: Romain Manni-Bucau
>
> The goal of this ticket is to enable user to get injected the completion future instead of the raw event and return another completion stage (generic type ignored) to enable the "chain" to be synched.
> Here is a sample:
> 1. fireAsync(persistEvent)
> 2. observer implementation does: return future.thenCompose(db::doAsyncPersist)
> 3. when the user gets back the result of the fireAsync the doAsyncPersist is completed.



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