maven-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From John Casey <>
Subject Re: Get thee to the Core...
Date Fri, 10 Jun 2011 15:28:56 GMT

On 6/10/11 3:48 AM, Mark Struberg wrote:
> We partly use slf4j internally already for tests, etc.
> But moving the whole Logger mess over to slf4j would be really great. There are lots
of tests (I sadly also found productive code too) still using System.out.println.
> The question is if we (internally) drop org.codehaus.plexus.logging.Logger completely
and use slf4j directly, or if we pimp up the plexus Logger and add various stuff.

I've been thinking about this for some time now, actually. If you look 
at the MAE stuff in the sandbox, I'm pretty sure that's using log4j 

Personally, I don't understand what value the Plexus 
logger/loggermanager has, especially given the configurability of these 
other logging frameworks.

I'd be in favor of providing a "default" logging configuration file in 
either the Maven app directory or in ~/.m2, and then letting people 
customize from the command line to highlight specific components/packages.

Although, having said that, one of my pet peeves about the logging 
frameworks is they haven't shifted to using String.format, 
MessageFormat.format, or whatever under-the-covers as a way of limiting 
string concatenation in cases where a particular log level has been 

Even something as simple as the attached code would be a nice facade for 
logging, IMO...but it's more of a wish-list item than anything else.

In short, yes, let's think about switching to a better logging 
framework. We can deprecate the plexus logger, and eventually get rid of it!

> We would need to do some compat code anyway, but I'm not sure if it pays off to restrict
ourself. At least not after I saw that even the LoggerManager uses System.err.println:
> // TODO: use a logger!
> System.err.println( "There was no such logger '" + key + "' " + hashCode() + "." );
> dumdidum :)
> LieGrue,
> strub
> --- On Fri, 6/10/11, Ralph Goers<>  wrote:
>> From: Ralph Goers<>
>> Subject: Re: Get thee to the Core...
>> To: "Maven Developers List"<>
>> Date: Friday, June 10, 2011, 5:03 AM
>> On Jun 9, 2011, at 2:45 PM, Benson Margulies wrote:
>>> I'd like to offer a small suggestion.
>>> One of the big barriers to maven happiness is the
>> difficulty of
>>> understanding, in some cases, why it does what it
>> does.
>>> This suggests to me three efforts that might offer an
>> opportunity to
>>> learn core code without drowning.
>>> 1: take up slf4j, and thus allow component (indeed
>> class) by component
>>> log control as an alternative to the giant -X spew.
>> Now that is an interesting idea. For the past year I have
>> been working on creating Log4j 2.0 pretty much by
>> myself.  This would be a great way to integrate it into
>> something useful.
>> Ralph
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail:
>> For additional commands, e-mail:
> ---------------------------------------------------------------------
> To unsubscribe, e-mail:
> For additional commands, e-mail:

John Casey
Developer, PMC Member - Apache Maven (

View raw message