Hello Erik,
Thank you for posting an initial implementiation. However, the code is a
contribution from Jim Moore to the log4j project. (You can find in log4j SVN
under the contrib directory). Thus, it implicitly carries the the Apache
Software License.
Also note that Jim's code does not deal with exceptions. Ideally, one would
capture exceptions as well. If you look at the printStackTrace method in the
Throwable class, you will see that the method
1) invokes s.println(this), where s is System.err,
2) invokes s.println("\tat " + trace[i]) where trace[i] is the i th stack frame
3) If there are nested exceptions, invokes s.println("Caused by: " + nested)
4) invokes s.println("\tat " + trace[i]) where trace[i] is the i th stack frame
in the nested exception
5) invokes s.println("\t... " + framesInCommon + " more") if there are any
common stack frames, which there always are for nested exceptions
6) continue with step 3 if the nested exception has itself nested exceptions
Step 1 can serve as a starting point for entering exception capture mode. Any
string not matching the patterns in steps 2-8 can serve as a point for exiting
capture mode. Admittedly, it's kind of a messy/tricky.
Binary instrumentation of the Throwable.printStackTrace() method with a java
agent could constitute a much more elegant solution.
Erik van Oosten wrote:
Hi,
We are currently using the implementation attached below. It was found
on the web for free use. It bears no copyright statement, only the
author's name so I guess it is good for open sourcing properly.
The implementation is written for log4j, adapting it for slf4j should be
trivial.
Regards,
Erik.
Papick Garcia Taboada wrote:
Hi,
I have an API that outputs some usefull information to an OutputStream.
I would like to pipe this to slf4j.
Is there a nice wrapper for that?
brgds,
Papick
--
Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch
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