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Re: [aspectj-users] Question on Tracing Aspect
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Manjula,
Use either thisJoinPointStaticPart.getSignature().getDeclaringType() or
thisJoinPointStaticPart.getSignature().getDeclaringTypeName(). I think you
have ended up with java.lang.String.
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/
Manjula Jayaraman <manjuv123@xxxxxxxxx>@eclipse.org on 09/05/2005 05:14:14
Please respond to aspectj-users@xxxxxxxxxxx
Sent by: aspectj-users-bounces@xxxxxxxxxxx
To: aspectj-users@xxxxxxxxxxx
cc:
Subject: Re: [aspectj-users] Question on Tracing Aspect
Thanks Matthew. As i mentioned before, i'm using
staticinitialization to get the logger as follows:
EspressoTrace.initLogger(EspressoLogger.getLogger(thisJoinPointStaticPart.getSignature().getDeclaringTypeName().getClass()));
When i use the above, i don't see the correct class
name in the log statement. Could you please let me
know what's that i'm missing?
Thanks,
Manjula
Manjula,
You have 3 choices:
1. Using a logging framework like java.util.logging in
the example which
has separate configuration. Each time you start you
program you can chose
which classes get logged. The aspect implementation is
efficient enough
that having the logging woven but disabled will only
have a minor impact on
application performance.
2. Use an aspect enabling/disabling technique
described by Adrian Colyer in
his blog:
http://www.aspectprogrammer.org/blogs/adrian/2005/03/perinstance_asp.html,
http://aspectprogrammer.org/modules/sections/index.php?op=printpage&artid=2
3. Use the load-time weaving feature that will be in
the final version of
AspectJ 5:
http://www.eclipse.org/aspectj/doc/ajdk15notebook/index.html
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/
--- Manjula Jayaraman <manjuv123@xxxxxxxxx> wrote:
> Thanks Matthew. I used staticinitialization and it
> worked for me.
>
> Another question is that is there a dynamic waying
> of
> turning off aspects J in the production. For
> example,
> i've an aspect EspressoTraceAspect for tracing. If i
> want to disable it, i've to change the pointcut and
> recompile and redeploy that in the production. Is
> there another way without going through this
> compilation?
>
> Thanks in advance,
> Manjula
>
>
> --- Matthew Webster <matthew_webster@xxxxxxxxxx>
> wrote:
> >
> >
> >
> >
> > Manjula,
> >
> > Please see my append to aspectj-dev for a good
> > tracing aspect example:
> >
>
http://dev.eclipse.org/mhonarc/lists/aspectj-dev/msg01261.html.
> > If you want
> > per-thread tracing i.e. one logger per thread
> > instead of the usual one
> > logger per class you will need to make your Logger
> a
> > ThreadLocal. Only do
> > this if you want to control tracing on a
> per-thread
> > basis because most
> > implementations allow you to distinguish outputs
> > produced on different
> > threads.
> >
> > 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/
> >
> > Manjula Jayaraman
> <manjuv123@xxxxxxxxx>@eclipse.org
> > on 03/05/2005 23:27:04
> >
> > Please respond to aspectj-users@xxxxxxxxxxx
> >
> > Sent by: aspectj-users-bounces@xxxxxxxxxxx
> >
> >
> > To: aspectj-users@xxxxxxxxxxx
> > cc:
> > Subject: [aspectj-users] Question on Tracing
> > Aspect
> >
> >
> > Hi All,
> >
> > I'm new to Aspect J. I wrote my first aspect using
> > Aspect J for tracing. I would like to log a
> message
> > upon entry and exit of all the methods in ALL the
> > packages in my project.
> >
> > I've a class called EspressoLog as follows:
> >
> > public class EspressoTrace {
> >
> > private static Logger logger = null;
> >
> > public static void initLogger(Logger l) {
> > logger = l;
> > }
> > public static void traceEntry(String
> > message)
> > {
> > logger.debug("Entering : " +
> > message);
> > }
> >
> > public static void traceExit(String
> message)
> > {
> > logger.debug("Exiting : " +
> > message);
> > }
> > }
> >
> > I've another class as follows
> >
> > aspect EspressoTraceAspect {
> >
> > private Logger logger;
> >
> >
> > pointcut traceCall() : target(*) &&
> > execution(public *
> > com.apple.ist.espresso.xmlparser..*(..));
> >
> > before() : traceCall() {
> >
> >
>
EspressoTrace.initLogger(EspressoLogger.getLogger(thisJoinPointStaticPart.getSignature().getName().getClass()));
> >
> > EspressoTrace.traceEntry("" +
> > thisJoinPointStaticPart.getSignature().getName());
> > }
> >
> > after() : traceCall() {
> > EspressoTrace.traceExit("" +
> > thisJoinPointStaticPart.getSignature().getName());
> > }
> >
> > }
> >
> >
> > My problem is that i'm calling initLogger every
> time
> > in before method of my EspressoTraceAspect. But
> the
> > efficient way to do this is to call only once per
> > invocation of a class not before the invocation of
> > each method in that class. how can i achieve this?
> >
> >
> > Also, if the same class is called through multiple
> > threads having the Logger attribute as static in
> > EspressoTraceAspect would not help. How should i
> > handle that?
> >
> > Thanks for any input in advance,
> > Manjula
> >
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