Re: [Springframework-developer] ApplicationEventPublisher

[Dmitriy K. <dko...@ru...>]

Juergen,

The main reason I've introduced ApplicationEventPublisher interface is 
to factor out event publishing from the ApplicationContext interface. I 
am totally happy with your suggested design.

Regards,
Dmitriy.

jürgen höller [werk3AT] wrote:

>Dmitriy,
> 
>I've seen that you've added an ApplicationEventPublisher interface plus SimpleApplicationEventPublisher implementation, used as base class for EventPublicationInterceptor. I'm not sure if those really add value: EventPublicationInterceptor *derives* from SimpleApplicationEventPublisher, so it doesn't leverage the pluggability offered by the ApplicationEventPublisher interface.
> 
>If we want to factor out event publishing from the ApplicationContext interface, I suggest to add an ApplicationEventPublisher interface to the org.springframework.context package, extended by the ApplicationContext interface. We've used the same strategy for the MessageSource and ResourceLoader interfaces. (Have a look at the interfaces that ApplicationContext extends.)
> 
>We could then add an ApplicationEventPublisherAware interface, which beans can implement to automatically receive a reference to an ApplicationEventPublisher (usually the containing ApplicationContext). EventPublicationInterceptor can then simply implement that interface, rather than ApplicationContextAware, allowing it to be used with any ApplicationEventPublisher.
> 
>For a comparison, have a look at the ReloadableResourceBundleMessageSource's implementation: It implements ResourceLoaderAware to automatically receive a containing ApplicationContext as ResourceLoader. Additionally, it has a DefaultResourceLoader as default, to allow for usage outside an ApplicationContext too. You could also pass in a custom ResourceLoader implementation.
> 
>What do you think? If my suggested redesign fits your needs, I'm happy to apply it before the 1.1.1 release.
> 
>Juergen
> 
>
>
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