[jboss-dev] jbossas -beans.xml opt
Brian Stansberry
brian.stansberry at redhat.com
Wed May 13 15:42:35 EDT 2009
Ales Justin wrote:
>> Should I as a bean developer understand when I need it and when I
>> don't? (I'm truly asking, although my instinct is that I should.)
>
> Yes, you should. And it's not hard to do so.
>
> To leave out (1) or use (1)'s value you are probably using one of the
> org.jboss.beans.metadata.api.annotations.* annotations in your bean class.
> (or your custom annotation + pluing - like ALR does here:
> http://exitcondition.alrubinger.com/2008/12/20/doing-two-models-at-the-same-time/)
>
Sure, (1) is straightforward and clear.
>
> To use (2) you are 100% sure you don't wanna aspectize your bean.
> e.g. I'm pretty sure we don't wanna our deployers as AOP proxies
>
It's that "100% sure" part that's the rub. :) I 100% know how I expect
my beans to be used. But I could easily be unaware of some subtlety in
how, for example, the ProfileService management view uses them.
But this quote from your first post sums it up pretty well; I should
have focused more on it:
>>>>> (2) @org.jboss.aop.microcontainer.annotations.DisableAOP
>>>>>
<snip/>
>>>>>
>>>>> If you use @JMX or anything similar, this should then *not* be used.
>>>>> But for anything else it should be good to use it.
Having a quick look through the beans in the deploy dir, a high % have
the @JMX annotation declared via xml, and probably many more have it in
the java code. That's a good argument for needing to @DisableAOP as the
norm rather than an @EnableAOP.
- Brian
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