users@javaee-spec.java.net

[javaee-spec users] Re: About Interceptors's enabling

From: Pete Muir <pmuir_at_bleepbleep.org.uk>
Date: Thu, 17 Oct 2013 14:12:01 +0100

Hi Tang,

I'm afraid I don't quite understand your question :-(

Perhaps you could provide a concrete example of what you would prefer?

Pete

On 17 Oct 2013, at 09:03, Tang Yong <tangyong_at_cn.fujitsu.com> wrote:

> Pete
> CC: Bill
>
> I have a question about Interceptors's enabling.
>
> The story should come from [1] and [2], and from "5.3 Ordering
> Interceptors using the Priority Annotation" of JSR 318.
>
> "An interceptor bound to a component, a component method, or constructor
> using interceptor binding may be enabled for the entire application by
> applying the Priority annotation, along with a priority value, on the
> interceptor class."
>
> From another fact, Interceptors are deployment-specific and are disabled
> by default. Like alternatives, interceptors have to be
> enabled by using the CDI deployment descriptor beans.xml of the jar.
>
> Well, if I uses interceptors binding, I will meet two cases,
>
> 1) I must enable interceptors in beans.xml explicitly if I am not ready
> to use @Priority.
>
> 2) Once I uses @Priority, I need to take care of whether to need to
> declare interceptors in beans.xml becase this may break/override
> invocation order of interceptors.
>
> Based on such facts, enable interceptors in beans.xml explicitly has
> brought two different resposibilities for interceptors binding, so, for
> an user, this has caused some puzzles just as I made a mistake in [2].
>
> My question is that why we can not make "enable interceptors in
> beans.xml explicitly" bring *only one* resposibility?
>
> Thanks
> Tang
>
> [1]:
> https://java.net/projects/javaee-spec/lists/jsr342-experts/archive/2012-12/message/15
> [2]: https://issues.jboss.org/browse/WELD-1528
>
>
> --
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> Tang Yong
> Senior Engineer
> GlassFish Committer (OSGi & OSGi-JavaEE)
> OSGi Alliance Supporter
> Blog: http://osgizone.typepad.com/tangyong/
>
> Nanjing Fujitsu NanDa Software Tec CO.,LTD
> http://www.fujitsu.com/cn/fnst
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> Fax: +86-25-83317685              
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