From: Ed Syrett <edward.syrett@...>
Date: 2006-04-25T18:11:21+09:00
Subject: Re: log4r - context (NDC)

List Recv wrote:
> Is there anyway to set a context for log4r?
> 
> log4j has somethign like NDC
> 
> Basically, in a web app, I'd like to correlate messages for the same
> client.  I'd like to do something like
> 
> context = "#{user.ip} #{user.name}"
> 
> and have it automatically appended to each logging message, or, even
> better, appended whenever the context changes (that is, if there are 5
> messages in a row from the same user, no need to keep repeating the
> context)
> 
> is this available?

I had a similar issue with Log4r, and no there isn't currently a way to
automatically log the context (i.e. the logged in user etc) However, I
enhanced our copy of Log4r to take an extra optional parameter on all
log calls (.debug, .warn etc) that appears in all log messages, and I
plan to have the logged on user appear in there.  That's probably as
good as it'd going to get; the logger object is a singleton, so you
couldn't just set a context into the object and have it available to the
user's session and automatically append the context to every log
message.  That might be a useful enhancement though.

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