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From "Shapira, Yoav" <Yoav.Shap...@mpi.com>
Subject RE: [ThrowableClassMatchFilter] RE: Sandbox problems
Date Tue, 09 Dec 2003 16:50:27 GMT

Howdy,
Probably ;)  I don't mind junking this filter.

Yoav Shapira
Millennium ChemInformatics


>-----Original Message-----
>From: Ceki Gülcü [mailto:ceki@qos.ch]
>Sent: Tuesday, December 09, 2003 11:42 AM
>To: Log4J Developers List
>Subject: RE: [ThrowableClassMatchFilter] RE: Sandbox problems
>
>
>Given that the throwable instance is no longer available, I think it will
>be far more efficient to add the check in your code instead of relying on a
>filter bound to be slow.
>
>At 11:25 AM 12/9/2003 -0500, Shapira, Yoav wrote:
>
>>Howdy,
>>I don't use it myself at this point because it's not part of the core
>>distribution.  The use-case I have in mind for this filter is that of
>>expected errors that you don't want to log.
>>
>>Specifically, we have a math library that we ask to calculate all sorts of
>>functions for us on sets of data.  This library throws some of its own
>>exceptions (InconsistentDataException, etc.), but we access it through a
>>façade that throws Exception, and in addition the library throws NPEs
>>sometimes, so our code is like
>>try {
>>   ... call façade method ...
>>} catch (Exception e) {
>>   ... log exception ...
>>}
>>
>>If the exception is one from the math library, I don't want it logged.  So
>>I would configure a ThrowableClassMatchFilter with the math library's
>>exception class.  I'd prefer this to adding the math libraries' throwable
>>class names to my own code.
>>
>>That's it ;)
>>
>>Yoav Shapira
>>Millennium ChemInformatics
>
>--
>Ceki Gülcü
>
>      For log4j documentation consider "The complete log4j manual"
>      ISBN: 2970036908 http://www.qos.ch/shop/products/clm_t.jsp
>
>
>
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