RE: [aspectwerkz-user] Getting attribute parameter in an advice

I want multiple advices in a single aspect, and each advice getting it's own
value of the param/attribute, hence cannot use the param name, value option.
My bootstrap aspect will be used to identify the context information of the
call by looking at this value.

AspectWerkz does not allow defining multiple aspects with same name in the
same system, and hence, what this means is that I have to define a single
aspect in each system.

The ability to specify attribute seems to be a powerful feature, why was it
deprecated?


Thanks,
Sameer

> -----Original Message-----
> From: Alexandre Vasseur [mailto:[email protected]]
> Sent: Sunday, April 23, 2006 3:46 PM
> To: [email protected]
> Subject: Re: [aspectwerkz-user] Getting attribute parameter in an advice
> 
> You should use <aspect ..><param name= value= /> instead.
> See
> http://aspectwerkz.codehaus.org/xml_definition.html#Passing_parameters_to_
> aspects
> 
> I guess this advice level attribute in the dtd is a deprecated thing.
> Alex
> 
> On 4/20/06, Sameer Pokarna <[email protected]> wrote:
> >
> >
> >
> > Hi,
> >
> >
> >
> > I am trying to pass parameters to the aspects, however, I would like to
> get
> > finer granularity than the "param" support in aspects, i.e. I have
> multiple
> > advices declared in a single aspect, and I would like to get different
> > values of parameters for each invocation of advice.
> >
> >
> >
> > Aspectwerkz2.dtd specifies an "attribute" attribute to the advice XML
> > element. I was trying to write a code to enable me to do this.
> >
> > I am trying to use the AdviceDefinition object to retrieve the attribute
> > using the getAttribute(). So, the code snippet that I am trying to use
> is:
> >
> >
> >
> >         SystemDefinition sd =
> >
> >             SystemDefinitionContainer.getDefinitionFor
> >
> >                 (Thread.currentThread().getContextClassLoader(),
> > "systemname");
> >
> >         Collection coll = sd.getAdviceDefinitions();
> >
> >         Iterator itr = coll.iterator();
> >
> >         while (itr.hasNext())
> >
> >         {
> >
> >             AdviceDefinition ad = (AdviceDefinition)itr.next();
> >
> >             if ("advicename".equals(ad.getName()))
> >
> >             {
> >
> >                 System.out.println("ad.getAttribute() = " +
> > ad.getAttribute());
> >
> >                 System.out.println("ad.getExpressionInfo().toString() =
> " +
> > ad.getExpressionInfo().toString());
> >
> >             }
> >
> >         }
> >
> >
> >
> > I am getting the expression correctly, but the advice "attribute" as
> null.
> >
> >
> >
> > The aop.xml looks something like this:
> >
> >
> >
> >     <system id="systemname">
> >
> >
> >
> >         <package name=".">
> >
> >             <aspect class="BootstrapAspect" deployment-model="perJVM">
> >
> >
> >
> >                 <pointcut name="." expression="."/>
> >
> >
> >
> >                 <advice name="advicename" type="around"
> >
> >                         bind-to="."
> >
> >                         attribute="attribValue"/>
> >
> >
> >
> > .
> >
> >
> >
> > I cannot see the method setAttribute() being called from anywhere in the
> > aspectwerkz codebase.
> >
> > Is this feature supported/working?
> >
> >
> >
> >
> >
> > Thanks and regards,
> >
> > Sameer
> >
> >