[Koha-devel] [RFC] Using Log4perl to extend and improve logging and debugging

[Jean Pieerre Ducassou]

Frederic Demians escribió:
> Thanks Andrew. I've tried out your patch. As a proof of concept, it
> works for me! I was pleasantly surprised by how easy it has been
> to test your patch thanks to git...
>
> The question is: how your logging mechanism will play with current Koha
> logging systems: warning in code and C4/Log.pm? I'd suggest:
>
>   * user log: keep C4/Log.pm for logging Koha users activities
>   * system log: Log4perl for debugging and support
>
> My testing notes:
>
> log4perl.conf configuration file
>  
>   It should rather be placed in a configuration directory than in Koha
>   install root directory.
>  
> Installation process
>
>   Koha installation process will have to take care of a default logging
>   schema, installing :
>  
>   * log4perl.conf in the appropriate directory, with other conf files
>     (obviously)
>   * various log files in the log directory which depend on installation
>     type: dev, standard (with correct right: 0666)
>     
> Repetitions
>
>   Log messages seem to be repeated in several log files using your
>   log4perl.conf file. For example, doing a search in OPAC
>   create 3 log messages:
>  
>     - 2 in koha-opac.log
>     - 1 in koha.log
>
> --
> Frédéric
>
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> Koha-devel at lists.koha.org
> http://lists.koha.org/mailman/listinfo/koha-devel
>   
I being using Log4perl for some time. It's really cool indeed.
I think the best way to patch the system is import it in C4::Context 
like this:
use Log::Log4perl;

Log::Log4perl -> init_once($conf_log_fname);

Then all the other modules just have to do:
use Log::Log4perl;

my $logger = Log::Log4perl -> getlogger();

It's magical!
Furthermore, the configuration could be loaded from the main config file.
As for the repetitions, it's just a matter of configuring it properly 
I'm sure.

May be Koha should use a whole framework (like CGI::Application). It 
would be easier to mantain and far more powerful.

Kind regards,
JP.