[cdi-dev] [JBoss JIRA] (CDI-31) Asynchronous events

Thu Apr 12 02:59:47 EDT 2012

    [ https://issues.jboss.org/browse/CDI-31?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12683360#comment-12683360 ] 

Stuart Douglas commented on CDI-31:
-----------------------------------

I think that this could be as simple as Event.fireAsync() and BeanManager.fireAsyncEvent(). 

The events observers would still be notified synchronously in respect to each other (i.e. in the same thread), but fireAsync would return immediately. The async event would have its own request context, in much the same way as an async EJB invocation. 

The main reason why I am against specifying the threading type on the observer is that it means that if a 3rd party adds an async observer to an event it opens you up to some very nasty thread safety bugs if you are not using immutable events. 

> Asynchronous events
> -------------------
>
>                 Key: CDI-31
>                 URL: https://issues.jboss.org/browse/CDI-31
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>          Components: Events
>    Affects Versions: 1.0
>            Reporter: Nicklas Karlsson
>             Fix For: TBD
>
>
> Consider including asynchronous events as their were specified in one of the previous drafts.

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