[jira] [Closed] (ISIS-2043) Allow domain events to be specified at @DomainObject, and make mixins aware of this.

["Dan Haywood (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ISIS-2043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dan Haywood closed ISIS-2043.
-----------------------------

> Allow domain events to be specified at @DomainObject, and make mixins aware of this.
> ------------------------------------------------------------------------------------
>
>                 Key: ISIS-2043
>                 URL: https://issues.apache.org/jira/browse/ISIS-2043
>             Project: Isis
>          Issue Type: New Feature
>    Affects Versions: 1.16.2
>            Reporter: Dan Haywood
>            Assignee: Dan Haywood
>            Priority: Major
>             Fix For: 1.17.0
>
>
> Thus:
> {code:java}
> @DomainObject(
>     ...,
>     actionDomainEvent=IncomingInvoice.ActionDomainEvent.class, 
>     propertyDomainEvent=IncomingInvoice.PropertyDomainEvent.class,
>     collectionDomainEVent=IncomingInvoice.CollectionDomainEvent.class
> )
> public class IncomingInvoice {
>   public static class ActionDomainEvent 
>       extends o.a.i.applib.services.eventbus.ActionDomainEvent {}
>   // etc
> }{code}
> then, for this domain event would be used as the default for any actions etc.
> Two refinements to this:
> a) for mixins, the event type emitted by a mixin action should be that of its mixee if possible.  This does mean that the domain event must use <Object> as its generic type, because the source could either be the regular domain object or a mixin.  This seems reasonable, the subscriber can just call ev.getMixee() to determine the original source.
> b) as a metamodel validation, if there are members that already define their own event types, then these event types should inherit from the types defined in @DomainObject.  However, not sure exactly how well this plays with requirement from (a) that the generic type is <Object>.
>  
>  
>  



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