log4perl-devel

[log4perl-devel] Logging to Multiple Log Files

[William R. <wd...@po...>]

Using log4perl, is it possible to have multiple log files/Logfile 
appenders?  E.g., most logging goes to 'my_application.log', but with 
something like 'get_logger( "SPECIAL" )' I can route messages to 
'special.log'?

Apologies if this is a stupid question -- I tried search the docs & list 
archives and came up dry.

TIA!

-Bill

Re: [log4perl-devel] Logging to Multiple Log Files

[Mike S. <m...@pe...>]

On Wed, 17 Sep 2008, William Reardon wrote:

> Using log4perl, is it possible to have multiple log files/Logfile
> appenders?  E.g., most logging goes to 'my_application.log', but with
> something like 'get_logger( "SPECIAL" )' I can route messages to
> 'special.log'?

Sure, that's a common case: Just define another category and have its
messages routed to a second appender:

use Log::Log4perl qw(:easy);

     my $conf = q{
     log4perl.logger.foo = DEBUG, FooAppender
     log4perl.logger.bar = DEBUG, BarAppender

     log4perl.appender.FooAppender = Log::Log4perl::Appender::File
     log4perl.appender.FooAppender.filename = foo.log
     log4perl.appender.FooAppender.layout = SimpleLayout

     log4perl.appender.BarAppender = Log::Log4perl::Appender::File
     log4perl.appender.BarAppender.filename = bar.log
     log4perl.appender.BarAppender.layout = SimpleLayout
     };

     Log::Log4perl->init( \$conf );

     get_logger("foo")->debug("foo!");
     get_logger("bar")->debug("bar!");

gets you

     $ cat foo.log
     DEBUG - foo!

     $ cat bar.log
     DEBUG - bar!

-- Mike

Mike Schilli
m...@pe...