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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