From: John Pritchard-williams <monojohnny@...>
Date: 2008-08-30T03:31:52+09:00
Subject: Re: How to use log4r to generate xml format log file?

Olivia Dou wrote:
> Hi,
>   I want to use log4r to generate xml formatted log file, but I'm not
> familiar with it and thus have no idea how to do.

Hi Olivia,

I've not done this either, but done quite a bit of 'log4j': seems the 
two packages are (superficially) similar, but there doesn't appear to be 
a default XML appender (formatter I think in log4r?), but looks like the 
API is flexible enough to let you produce your own XML:

http://log4r.sourceforge.net/rdoc/files/log4r/formatter/patternformatter_rb.html

...
Pattern String
...
  p = PatternFormatter.new(:pattern => "[%l] %d :: %.15m")

You wanted your individual methods in there: not sure you can do that or 
not:

http://log4r.sourceforge.net/rdoc/files/log4r/formatter/patternformatter_rb.html

...
What the Directive Letters mean
...
Maybe this directive is close enough? (dunno)

t
    Produces the file and line number of the log event. The appearance 
varies by Ruby version, but it is the same output returned by 
Kernel#caller[0]. Slow

I know on 'log4j' it is NOT recommended to output Method calls : really 
grinds the program to almost halt.

Maybe this help, dunno,

John


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