Gregor and Ron,
Thanks for your suggestions.
Unfortunately in my case, I can’t determine from just the Throwable
whether or not it should be logged. For example, a FooBarException should
be logged in some cases but not others, depending on the surrounding application
logic. Really the only way to determine this is a decision on the part of
developer, which is why I was experimenting with annotations.
Perhaps I could use thisJoinPoint in
combination with a naming convention for the throwable, i.e. any throwable
named “expectedThrowable” would not be logged. It would be
nice if I could do something more explicit (like an annotation) but perhaps it’s
not possible. Please let me know if I’ve misunderstood something
about your suggestions.
Thanks,
Tobias
From:
aspectj-users-bounces@xxxxxxxxxxx [mailto:aspectj-users-bounces@xxxxxxxxxxx] On Behalf Of Gregor Kiczales
Sent: Wednesday, November 30, 2005
1:26 PM
To: aspectj-users@xxxxxxxxxxx
Subject: RE: [aspectj-users]
Excluding Particular Joinpoints
From: aspectj-users-bounces@xxxxxxxxxxx
[mailto:aspectj-users-bounces@xxxxxxxxxxx] On
Behalf Of Tobias Dunn-Krahn
I am using AspectJ in a project to log
all handled exceptions. In general this is what I want, but in a small
number of cases such exceptions are “expected” and I do not wish to
log them.
aspect
FooBarExceptionLoggingStrategy {
before(Throwable t): handler(Throwable) && args(t) {
if( shouldLog(t) )
log(t);
}
private
boolean shouldLog(Throwable t) {
<<test whatever needs testing here>>
}
private
void log(Throwable t) {
...
}
}
The point being that you can test the
exception in any way you want before logging it.
You could also pass thisJoinPoint or
thisJoinPointStaticPart. If you want, you could
move shouldLog into the actual pointcut,
using if(shouldLog(t)).
From:
aspectj-users-bounces@xxxxxxxxxxx [mailto:aspectj-users-bounces@xxxxxxxxxxx] On Behalf Of Tobias Dunn-Krahn
Sent: Wednesday, November 30, 2005
11:42 AM
To: aspectj-users@xxxxxxxxxxx
Subject: [aspectj-users] Excluding
Particular Joinpoints
Hello All,
I am using AspectJ in a project to log all handled
exceptions. In general this is what I want, but in a small number of
cases such exceptions are “expected” and I do not wish to log
them. My pointcut definition is currently very simple; it matches all
exception handlers except those that handle SocketTimeoutExceptions:
pointcut exceptionHandlers(Throwable t) :
handler(Throwable+) && (args(t)
&&
!args(java.net.SocketTimeoutException));
However, now I need to exclude matching of particular
exception handlers that are not distinguishable by type. I tried creating
a custom annotation with target type LOCAL_VARIABLE and using this annotation
to decorate the exception, but unfortunately annotations of this type are not
retained for runtime (and are therefore inaccessible). Does anyone have
any suggestions?
Thanks in advance,
Tobias
