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Re: [aspectj-users] pointcuts from a properties file
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All,
Thanks for the tips. These are great. I was trying to be really lazy
by using a properties file, but abstract aspects works just fine as well.
Thanks.
Charlie
Matthew Webster said the following on 1/26/2005 3:51 AM:
Charlie,
Please see the Tracing examples in Chapter 3 of the Programming Guide
(http://dev.eclipse.org/viewcvs/indextech.cgi/~checkout~/aspectj-home/doc/progguide/examples-development.html)
to find out more about abstract pointcuts and library aspects. Several
chapters of our new book Eclipse AspectJ
(http://www.awprofessional.com/title/0321245873) go into more depth.
Wes is referring to the new AspectJ 5 load-time weaving support which is
configured using XML and allows you to define simple concrete aspects by
declaring pointcuts. Read more about it in the Developer's Notebook
(http://dev.eclipse.org/viewcvs/indextech.cgi/~checkout~/aspectj-home/doc/ajdk15notebook/index.html).
We are considering allowing this feature to be used for compile-time and
post-compile (binary) weaving too.
Matthew Webster
AOSD Project
Java Technology Centre, MP146
IBM Hursley Park, Winchester, SO21 2JN, England
Telephone: +44 196 2816139 (external) 246139 (internal)
Email: Matthew Webster/UK/IBM @ IBMGB, matthew_webster@xxxxxxxxxx
http://w3.hursley.ibm.com/~websterm/
"Wes Isberg" <wes@xxxxxxxxxxxxxx>@eclipse.org on 26/01/2005 01:37:50
Please respond to aspectj-users@xxxxxxxxxxx
Sent by: aspectj-users-admin@xxxxxxxxxxx
To: aspectj-users@xxxxxxxxxxx
cc:
Subject: Re: [aspectj-users] pointcuts from a properties file
wrt this...
I can't really find the javadoc that says whether
"execution"
(or "call" or any of the other methods) takes a String or not.
These are pointcuts, not methods, and can be considered to
exist only at compile/weave-time. The documentation is in the
AspectJ programmers guide.
Matt's right about abstract aspects. I suspect you want to say
"public method execution in any type below package
com.alloyinc.quiz.admin". You could create a library aspect
abstract aspect DoingThing {
abstract pointcut withinTypes();
pointcut publicMethodsWithinTypes() : withinTypes()
&& execution(public * *(..));
before() : publicMethodsWithinTypes() { ... }
// more advice
}
then use it like this
aspect DoingMyThing extends DoingThing {
pointcut withinTypes() : within(com.alloyinc.quiz.admin..*);
}
I believe Adrian, et al are working on a way to allow you to
configure a subaspect pointcut like this with config tools.
(Still more cool things coming out of those guys!)
Wes
------------Original Message------------
From: "Charles N. Harvey III" <charlieh@xxxxxxxxx>
To: aspectj-users@xxxxxxxxxxx
Date: Tue, Jan-25-2005 2:51 PM
Subject: [aspectj-users] pointcuts from a properties file
Hello.
I would like to write an aspect and put it in a jar file and have it
be re-used a lot. But, the classes that it will weave will change
in each project. So the pointcut statement has to change each time.
Consider this example:
----------------------------------------------------------------------------
/**
* pointcut defining which Action classes to weave into.
*/
public pointcut adminAuth( ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response )
: ( execution( public * com.alloyinc.quiz.admin.*.*.execute(..)
) ||
execution( public * com.alloyinc.poll.admin.*.*.execute(..)
) )
&& args( mapping, form, request, response );
/**
* Advice for <code>adminAuth</code> pointcut.
*/
ActionForward around( ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response )
: adminAuth( mapping, form, request, response )
{
// some stuff that checks for login
}
----------------------------------------------------------------------------
I want to be able to switch the following with text from a properties
file:
: ( execution( public * com.alloyinc.quiz.admin.*.*.execute(..)
) ||
execution( public * com.alloyinc.poll.admin.*.*.execute(..)
) )
Can I do that? I can't really find the javadoc that says whether
"execution"
(or "call" or any of the other methods) takes a String or not. If it
does,
I would think that I could replace it with a property. If not, well,
then
I guess not.
Thanks in advance if anyone knows the answer to this.
Charlie
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