Exception Quandry

[Robert Pepersack <rp...@mdinsurance.state.md.us>]

Hello.

I have an exception that wraps other exceptions.  I would like to log my 
own message and the message from the original exception's getMessage() 
method.  I also want to log a system-generated exception ID that is created 
in the constructor of my wrapper exception.  I want the log message and my 
wrapper exception's message to include the class and method name of where 
the message was logged.  So, my exception needs information from log4j, and 
log4j needs information from my exception.  Also, I have a class that 
converts SQLException into my own (more specifiic) exceptions by examining 
the error code inside SQLException.

The book has a chapter on MDC and NDC, but the information in the 
diagnostic contexts applies to a thread, not to a specific exception.  I've 
also considered using Ceki's Logger wrapper, but I'm wondering if there is 
a way to do this without extending log4j (although I'm very willing to 
extend log4j, if necessary).

Also, I read in the book that the %M (along with %C, %F, %l, and %L) "can 
be excruciatingly slow."  Does anyone know of a better way to get the 
method name of the calling class?  Is using a rendered object that contains 
the method name a good idea?

I've tried all of this a few ways, but none of them are elegant.  Does 
anyone have any ideas?

Thanks,

Bob


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