| Re: [aspectj-users] Logging Exceptions |
Please respond to aspectj-users@xxxxxxxxxxx
Sent by: aspectj-users-bounces@xxxxxxxxxxx
To:
aspectj-users@xxxxxxxxxxx
cc:
Subject:
Re: [aspectj-users]
Logging Exceptions
Very nice solution Matthew!
Could you also give us an example of the after advice for RuntimeExceptions?
thanx,
Kees de Kooter
On 3/15/06, Matthew Webster <matthew_webster@xxxxxxxxxx> wrote:
>
> There have been a couple of questions on this subject. The most common
> approach is to use the point where an exception is caught:
>
> public aspect ErrorLogging {
>
> private Logger logger = Logger.getAnonymousLogger();
>
> before (Exception ex) : handler(Exception+)
&& args(ex) {
> Signature sig =
> thisJoinPointStaticPart.getSignature();
> logger.logp(Level.SEVERE,sig.getDeclaringType().getName(),
> sig.getName(), ex.toString());
> }
> }
>
> This avoids getting a message for every method on the stack between
where
> the exception is thrown and where it is caught. Sometimes the exception
is
> not caught within your code and you would like to log it before control
is
> returned to a caller. In this case using after throwing advice at
the
> interface boundary is the best approach. This is usually the case
for
> RuntimeExceptions.
>
> 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/
>
> Please respond to aspectj-users@xxxxxxxxxxx
>
> Sent by: aspectj-users-bounces@xxxxxxxxxxx
>
> To: aspectj-users@xxxxxxxxxxx
> cc:
> Subject: [aspectj-users] Logging Exceptions
>
>
>
> What is the best way to log Exceptions?
>
> In code below, I show a simple program to test Logging Exceptions..
>
> But in this example, will appear somethig like this in log>(Is
this the
> best way???? I think not.. but what is better?)
> 13/03/2006 15:48:17 Test coisa
> SEVERE: java.lang.RuntimeException: bar
> 13/03/2006 15:48:17 Test foo
> SEVERE: java.lang.RuntimeException: bar
> 13/03/2006 15:48:17 Test main
> SEVERE: java.lang.RuntimeException: bar
> Exception in thread "main" java.lang.Exception: bar
> at Test.foo(Test.java:15)
> at Test.main(Test.java:10)
>
> Example:
> I have this class:
>
> public class Test {
> public static void main(String s[]) throws Exception{
> foo(new Test());
> }
>
> private static void foo(Test t) throws Exception{
> throw new Exception("bar");
> }
> }
>
> And I have this aspect:
>
> import java.util.logging.*;
> import org.aspectj.lang.*;
>
> public privileged aspect TestAspect {
> public static final Logger LOGGER =
> Logger.getLogger(TestAspect.class.getName());
>
> after() throwing (Exception ex): within(Test){
> Signature sig =
> thisJoinPointStaticPart.getSignature();
> LOGGER.logp(Level.SEVERE,
> sig.getDeclaringType().getSimpleName(), sig.getName(), ex.toString());
> }
> }
>
>
>
> _______________________________________________________
> Yahoo! Acesso Grátis - Internet rápida e grátis. Instale o discador
agora!
> http://br.acesso.yahoo.com
> _______________________________________________
> aspectj-users mailing list
> aspectj-users@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/aspectj-users
>
>
>
>
>
>
>
>
>
> _______________________________________________
> aspectj-users mailing list
> aspectj-users@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/aspectj-users
>
_______________________________________________
aspectj-users mailing list
aspectj-users@xxxxxxxxxxx
https://dev.eclipse.org/mailman/listinfo/aspectj-users