Re: [log4perl-devel] Optional loggers in config

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

On Sat, 6 Sep 2014, Bill Moseley wrote:

> 1) Is there a way in the config to optionally select appenders?   Or
> would it just be better to have more than one log4perl config file and

That'd probably be the most straight-forward and cleanest option,
alternatively you can use the L4p API to set up or your config, or even
change the appender in an existing configuration.

> 2) Perhaps a question for another list, but the ApacheLog appender
> wants a "$r", which the docs say is an Apache or Apache::Server
> object.    Something

I'm not quite sure I understand the ApacheLog documentation, as "$r"
typically is the request coming into a mod_perl handler, whereas the
docs indicate it's some kind of server object, which the Apache2 docs
denote as "$s". Best to clarify with the Log::Dispatch::ApacheLog folks.

> 3) Do I need to use Log::Log4perl::Appender::Synchronized with Apache?
>   In

I'd write to a separate logfile instead, turning the "syswrite" option
on, which ensures atomic writes without overlap.

> I assume setting utf8 is specific to the appender, right?

The "utf8" option is specific to the screen and file appenders, making
sure that Perl toggles the switch so that your utf8 strings get written
out as such.

-- -- Mike

Mike Schilli
m...@pe...

> In my log4perl config file I have a very simple screen appender.
>
>       log4perl.appender.screenAppender =
>       Log::Log4perl::Appender::Screen
> log4perl.appender.screenAppender.utf8     = 1
> log4perl.appender.screenAppender.layout =
> Log::Log4perl::Layout::PatternLayout
> log4perl.appender.screenAppender.layout.ConversionPattern \
>    = [%d{E MMM dd HH:mm:ss yyyy}] [%p] .......
> 
> 
> 
> Sometimes my Catalyst app runs under mod_perl2 and so I'd like to try using
> the Log::Dispatch::ApacheLog[1] appender instead of the Screen appender.   
> 
> 1) Is there a way in the config to optionally select appenders?   Or would
> it just be better to have more than one log4perl config file and select the
> file at start (e.g. by specifying which log4perl file to use at startup)?
> 
> 2) Perhaps a question for another list, but the ApacheLog appender wants a
> "$r", which the docs say is an Apache or Apache::Server object.    Something
> like this?
>
>       log4perl.appender.screenAppender = Log::Dispatch::ApacheLog
>       log4perl.appender.screenAppender.apache = sub {
>       Apache2::ServerUtil->server }
> 
> 
> I assume setting utf8 is specific to the appender, right?
> 
> 3) Do I need to use Log::Log4perl::Appender::Synchronized with Apache?   In
> my testing with the Screen appender messages < 4K are always written to the
> logs atomically -- anything larger then I can get mixing of log entries from
> different processes.
> 
> Thanks,
> 
> 
> [1] The reason would be to have a unified format for both app log entires
> and any messages Apache generates.
> 
> --
> Bill Moseley
> mo...@ha...
> 
>