Re: first steps with nanning

Yes that is most certainly possible. You should really
start using the AspectSystem stuff instead. That makes
it possible to modularize your aspects. So to have an
aspect that adds a singleton mixin I would do:

public class ArticleContainerAspect implements Aspect
{
  Pointcut objectsHavingArticleContainer =
P.or(P.isClass(ClassHavingArticle.class),
     P.isClass(SecondClassHavingArticle.class));

  ArticleContainer singletonArticleContainer = new
ArticleContainerImpl();

  public void introduce(AspectInstance instance) {
    objectsHavingArticleContainer.introduce(new
Mixin(ArticleContainer.class,
singletonArticleContainer);
  );

  public void advise(AspectInstance instance) {}
}

In your factory you would keep a singleton
AspectSystem and add the aspect:
private static AspectSystem aspectSystem;

static {
  aspectSystem.addAspect(new
FindTargetMixinAspect("Impl")); // this will find the
implementation of the main class as "Class" ->
"ClassImpl"
  aspectSystem.addAspect(new
ArticleContainerAspect());
}

To actually instantiate an object you'd do:
ClassHavingArticle classHavingArticle =
aspectSystem.newInstance(ClassHavingArticle.class);

>         AspectInstance instance = new
> AspectInstance();
>         Mixin mixin = new
> Mixin(ArticleContainer.class, new 
> ArticleContainerImpl());
>         instance.addMixin(mixin);

This will work too, but when the system starts to grow
it is definitely worthwhile to learn the
AspectSystem-stuff.

The Pointcut-stuff (Pointcut and the P-class) is still
a little bit new so everything isn't completely worked
out.

Hope that helps, good luck!
Jon

 --- Christoph Sturm <[email protected]> skrev: >
Hi jon!
> 
> I am trying to port my app from AW to nanning. In
> aspectwerkz, I can also 
> have singleton mixins. Does that work in nanning
> too? For example, can I 
> write it like this:
> 
>         AspectInstance instance = new
> AspectInstance();
>         Mixin mixin = new
> Mixin(ArticleContainer.class, new 
> ArticleContainerImpl());
>         instance.addMixin(mixin);
> 
>         AspectInstance instance2 = new
> AspectInstance();
>         instance2.addMixin(mixin);
> 
> 
> onw instance and instance2 share the same instance
> of the mixin. will that 
> work?
> 
> thx
>  chris
> 
> 
> 
> -- 
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