I have seen a lot of discussion on how properly write unit test code
with these proxies, does a neat solution was found? Using AspectJ
makes natural setting mocks, since it checks to see whether the field
is null. Also, it is a true IoC solution, and besides proxing does DI,
it isn't a "pure" solution.
2005/12/14, Christian Essl <[EMAIL PROTECTED]>:
> Me too. I see no reason in using AspectJ. Just use interfaces (which is
> nearly always good design) and everything works fine. And in face of DAOs
> the performance problem of the reflective method call is not realy there.
>
> Christian
>
> On Wed, 14 Dec 2005 08:00:37 -0800, Igor Vaynberg
> <[EMAIL PROTECTED]> wrote:
>
> > aspectj sounds pretty sweet. i guess it would work in majority of cases.
> > the
> > reason i would still prefer proxies is because I like constructs like
> > this:
> >
> > MyDataProvider implements IDataProvider {
> > private MyService svc;
> >
> > MyDataProvider(MyService svc) {
> > this.svc=svc;
> > }
> > ...
> > }
> >
> > this allows me to use the same dataprovider on a subset of services that
> > all
> > extend the same subinterface. and i think in general its more clear when
> > you
> > write code like
> > MyDataProvider provider=new MyDataProvider(service);
> >
> > but this is just a personal preference.
> >
> > -Igor
> >
> >
> >
> > On 12/14/05, Christian Essl <[EMAIL PROTECTED]> wrote:
> >>
> >> Right. Thanks for the advice :)
> >>
> >> BTW If you do not use interfaces, you can also not advice final methods
> >> or
> >> methods on a final class.
> >>
> >> The concern here is that when you do not use an interface proxy this
> >> also
> >> applies to the proxies which we use in spring-integration. This is a
> >> limitation of cglib, which is used by both Spring-AOP and
> >> Spring-integration proxies, when the proxy-type needed is not (an)
> >> interface(s).
> >>
> >> Christian
> >>
> >> On Wed, 14 Dec 2005 14:01:35 +0100, Laurent PETIT
> >> <[EMAIL PROTECTED]> wrote:
> >>
> >> > On 12/14/05, Christian Essl <[EMAIL PROTECTED]> wrote:
> >> >> AspectJ modfies the byte-code of your class while Spring-AOP either
> >> >> creates a proxy or a subclass. This means that ie in Spring-AOP you
> >> can
> >> >> not advice field acess or statements within a method. Basicly with
> >> >> spring
> >> >> AOP you can only adivce calls to a certain method.
> >> >
> >> > Hello, it's not totally right to say "spring AOP you can only adivce
> >> > calls to a certain method". Reality is a bit worse:
> >> >
> >> > With spring AOP, you can only advice method calls when the calls
> >> > originate from an instance that is not the instance that holds the
> >> > method.
> >> > So : if the method AClass.method1 is adviced with springAOP, and if in
> >> > a method AClass.method2 you do something like this.method1() then you
> >> > don't use the proxied instance and springAOP will not work.
> >> >
> >> > So with spring AOP, you can't advice private methods, and you can
> >> > advice (default), protected and public methods as long as you do not
> >> > call them directly from other methods of the same instance.
> >> >
> >> >
> >> > My 0.02 EUR,
> >> >
> >> > --
> >> > Laurent
> >> >
> >> >
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> >>
> >>
> >> --
> >> Christian Essl
> >>
> >>
> >>
> >>
> >>
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>
>
>
> --
> Christian Essl
>
>
>
>
>
> ___________________________________________________________
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>
>
>
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