Re: [log4perl-devel] Structured logging in log4perl

[Dmitry B. <ic...@in...>]

Yes, that's actually how I see it, get the raw data, format them to a certain type and pass to an appender.
As a matter of fact, this is exactly what Layouts allow me to do. I was wrong saying that they are meant to render strings only. If fact you get an array ref with all raw data inside the render() method. Maybe this is a bit which is missing in the FAQ, "How can I write my own layout?". :)
So, I can implement my own Layout::JSON or/and Layout::XML and use them with different appenders which working with strings. Nice! The only thing I'm missing here is the ability to use built in layouts like PatternLayout when I want to dump JSON to a log file as a formatted string. Or another example, compressing the data before passing them to the appender. That brings me to the idea of having a chain of layout (in current terminology) when you get an actual result passed through a number of layouts and formatted in each of them accordingly. But maybe this is a controversial feature request and should be discussed in a separate thread.

/Dmitry

Пятница, 15 марта 2013, 8:01 +01:00 от Lee < le...@gm... >:
> Sorry to reply to such a long and thoughtful e-mail with a URI, but do 
> you think being given access to the raw data would give you sufficient 
> means to format it?
> 
>  http://log4perl.sourceforge.net/releases/Log-Log4perl/docs/html/Log/Log4perl/FAQ.html#e8a46
> 
> Could you then forward the formatted data to an appender of your 
> choice/via appenders listed in the config?
> 
> Lee
>