[log4perl-devel] setting defaults for appenders

[Jonathan S. <sw...@po...>]

I've got a growing number of log files for different categories that I  
would like to all have the same layout and pattern, e.g.

    log4perl.appender.file1                            =  
Log::Log4perl::Appender::File
    log4perl.appender.file1.filename                   = /path/to/ 
logfile/1
    log4perl.appender.file1.layout                     = PatternLayout
    log4perl.appender.file1.layout.ConversionPattern   = %d{dd/MMM/ 
yyyy:HH:mm:ss.SS} [%p] %c - %m - %F:%L %P-%n

    log4perl.appender.file2                            =  
Log::Log4perl::Appender::File
    log4perl.appender.file2.filename                   = /path/to/ 
logfile/2
    log4perl.appender.file2.layout                     = PatternLayout
    log4perl.appender.file2.layout.ConversionPattern   = %d{dd/MMM/ 
yyyy:HH:mm:ss.SS} [%p] %c - %m - %F:%L %P-%n

    log4perl.appender.file3                            =  
Log::Log4perl::Appender::File
    log4perl.appender.file3.filename                   = /path/to/ 
logfile/3
    log4perl.appender.file3.layout                     = PatternLayout
    log4perl.appender.file3.layout.ConversionPattern   = %d{dd/MMM/ 
yyyy:HH:mm:ss.SS} [%p] %c - %m - %F:%L %P-%n

In the spirit of DRY, I'd like to eliminate those repeated layout and  
layout.ConversionPattern lines.

What's the best way to do this? I'm happy to create whatever  
subclasses necessary, but looking at the Appender, Appender::File,  
Layout, and Layout::PatternLayout classes, it wasn't clear to me what  
to subclass.

Thanks
Jon