Re: [aspectj-users] Load-time weaving of aspect with dynamically loaded

[Andrew Eisenberg <andrew@xxxxxxxxxxxx>]

Hi Jozef,

Perhaps I am misunderstanding, but if your class A is a source class
that you control, can you not use execution advice instead of call so
that there is no need for load time weaving?

I'm thinking something like:

pointcut callsToA() : execution (* * A.*(..));

before() : callsToA() {
  doYourStuff();
}

2010/4/21 Redeemer <redeemer.sk@xxxxxxxxx>:
> Hello
>
> I am working on a system, that supports dynamically loaded 3rd party plugins
> (have
> no source code nor bytecode of them in advance). In the system, there is a
> particular
> class (in the sources I am coding), say A, and I need to be able to define
> an advice
> that gets executed whenever any of these plugins calls some methods on any
> instance
> of A.
>
> So, I made an aspect that catches those calls and defines the advice. Now I
> have
> an aspect bytecode as well (thanks to eclipse).
>
> Now it seems that what I need to make it working, is a load-time weaving
> mechanism,
> so that whenever the plugin class is dynamically loaded, its weaven with the
> aspect.
> To get it complicated, I have to avoid running the system with 'aj' or with
> weaving agent.
>
> Having the 2 options of 3 total for load-time weaving restricted, it seems
> that what I need
> to do is to use some magic with WeavingURLClassLoader and let it load the
> plugins.
>
> Can anybody please give me a hint how to do that ? Because I have no clue
> how to use it to
> make it to do just that. Is that really what I need and Is what I need even
> possible ?
>
> Thanks in advance
> Jozef
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