Re: [aspectj-users] LTW weaving with foreign code

[trhouse <trhouse@xxxxxxxxx>]

Hi Andy,

 Thanks for replying. I am stilla  little confused. Are you telling me 
not to bother with the VM option: 
-Djava.system.class.loader=org.aspectj.weaver.loadtime.WeavingURLClassLoader 

but instead just use

-javaagent:pathto/aspectjweaver.jar as a VM option?


"The weaver will discover its configuration from the CLASSPATH"
Actually, I am not sure what this means. Do I need to specify something in the classpath so that the weaver will later find it and configure itself appropriately?


"It will look out for a file META-INF/aop.xml (or META-INF/aop-ajc.xml)
and use that to configure the weaving."



I think I understand this. I am to create a META_INF folder into which an aop-xml file is to be written which specifies the names of the aspects I want applied, as you outlined here:

<aspectj>
<aspects>
  <aspect name="SomeAspect"/>
</aspects>
</aspectj>

If you need to know about what is going on you can add a weaver
section into the aspectj section:

<weaver options="-debug"/>
Hmmm I am not sure what this means .. this is a part of the XML file which makes the aspect execution verbose in some way?

Thank you!


On 28 March 2012 11:16, trhouse<trhouse@xxxxxxxxx>  wrote:

> > Hi all,
> >
> > I am attempting to set up some LTW with a foreign (.class files only) code
> > base.
> >
> > After having read the documentation I am not sure what is required.
> > Specifically
> >
> >
> > If I provide
> > -Djava.system.class.loader=org.aspectj.weaver.loadtime.WeavingURLClassLoader
> > as a VM option, is this sufficient or do I also need to
> >
> > 1) have to set ASPECTPATH as a system variable or is this just for
> > developing aspects?
> > 2 have to set the ASPECTJ_HOME as a system variable or is this just for
> > developing aspects when I compile with AJC?
> > 3) add aspectjrt.jar  to my CLASSPATH system variable or is this just for
> > developing aspects when I compile with AJC?
> > 4) somehow include lib/aspectjrt.jar  and aspectjweaver.jar to the runtime?
> >
> >
> > So the idea is clear, I have foreign code. I have aspects already compiled.
> > I just want to run the foreign code as usual, but have the LTW apply itself
> > and execute the aspects as appropriate.
> >
> >
> > Many thanks...
> >
> >
> >
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