Re: Logging for dependencies of Maven plugin

Sat, 18 Apr 2015 05:17:07 -0700 

Hi Sander,

the next line of the documentation should interest you:
"The following system properties are supported to configure the behavior of this logger:" So you can set them programmatically as well or by cmdline, no need to use the simplelogger.properties. 


If I understand you correctly, you want to specify the loglevel for third  
party jars. I think that's not up to the plugin developer, but up to the  
plugin user.



I've been thinking about a solution to specify the logging level for a  
specific plugin execution, because often you're only interested in debug  
logging of a specific plugin and not in the complete Maven execution.
This is a real challenge to solve, especially in a multithreaded  
environment.


thanks,
Robert

Op Fri, 17 Apr 2015 05:56:03 +0200 schreef Sander Verhagen
<[email protected]>:


Hi all,



Thank you, Robert. I understand that you suggest changing a  
configuration file that is part of the local Maven installation. While  
that strategy would (possibly) suffice for myself, when debugging this  
plugin, I would appreciate contributing back a solution for all users of  
this plugin that worked without changing their local Maven installation.  
Are there any expectations with the current implementation of Maven,  
that plugins would be able to extend/override the definitions of  
$MAVEN_HOME/conf/logging/simplelogger.properties? I had seen your link  
[1] before and it mentions "a class loader resource named  
"simplelogger.properties"", but I'm unfamiliar in how that translates to  
class loading scopes of plugins (although I'd suspect that it would  
override the entire simplelogger.properties at best, if that already,  
which would not be extremely helpful).


I'd say that HttpClient is using commons-logging.

Sander.


Sander Verhagen
[  [email protected]  ]


NOTICE: my e-mail address has changed. You may still e-mail me at  
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-----Original Message-----
From: Robert Scholte [mailto:[email protected]]
Sent: Thursday, April 16, 2015 10:08
To: Maven Users List
Subject: Re: Logging for dependencies of Maven plugin

Hi,

This might be possible with Maven-3.1.1+ by changing the apache-maven-
3.x/conf/logging/simplelogger.properties
See SimpleLogger[1] for the configuration options.
You need to specify a specific logLevel for these packages

(org.slf4j.simpleLogger.log.a.b.c) , so it doesn't pick up the  
defaultLogLevel (

as passed by Maven, e.g. -X will set defaultLogLevel to
debug)
However, I don't know which logging framework is used by HttpClient. You

might need to add a specific SLF4J adapter to the  
apache-maven-3.x/lib/ext

for that.
This is how it should work, but I haven't tried it yet.

thanks,
Robert

[1] http://www.slf4j.org/api/org/slf4j/impl/SimpleLogger.html


Op Thu, 16 Apr 2015 16:54:24 +0200 schreef Endo Alejandro
<[email protected]>:

> I've wondered this myself for a while as well. Hope you find an answer
>
> -----Original Message-----
> From: Sander Verhagen [mailto:[email protected]]
> Sent: Thursday, April 16, 2015 02:20 AM
> To: [email protected]
> Subject: Logging for dependencies of Maven plugin
>
> Hi group,
>
>
> I already
> asked<http://stackoverflow.com/questions/29619125/logging-for-
dependen
> cies-of-maven-plugin> this on Stack Overflow, but I think it's a
> somewhat specialized question, so I wanted to ask here as well. I
> would like to influence logging of dependencies of a plugin that I'm
> contributing to, so that when Maven is ran in debug (-X, --debug) I
> can log some sensible debug information in the context of my plugin,
> without being flooded with debug logging from my plugin's
> dependencies.
>
> This is the situation:
>
> *         Building a plugin
>
> *         The plugin depends on
> org.apache.httpcomponents:httpclient:4.3.6 and uses HttpClientBuilder
> to build a CloseableHttpClient
>
> *         When Maven runs in debug (-X, --debug) also HttpClient kicks
> into debug mode
>

> *         While in debug mode, HttpClient logs way, way more than I  
want

>
> How can I configure my plugin so that a certain logger is not set to
> DEBUG, even though Maven is in debug (-X, --debug)?
>
> I have tried various strategies of doing this programmatically, or
> providing the logging configurations for a few of the common
> frameworks that I suspect are on my classpath (SLF4J, Commons Logging,
> Log4j), but all to no avail.
>
> Your help much appreciated.
>
>
> Sander Verhagen
> [  [email protected]<mailto:[email protected]>  ]
>
>
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