Re: [Jetty-support] Re: Changing the slf4j implementation in m2 plugin

[Ceki <li...@qo...>]

Jan,

Thank you for the lengthy response. From what you state, it looks like you=
=20
are doing the maximum without explicit support from Maven. However,=20
wouldn't it be nicer if Maven itself provided ways for the user to specify=
=20
the preferred implementation of a given API? It seems like a basic=20
requirement to me. I'll go knock on Maven's door to see what they have to=
 say.

At 02:13 PM 3/22/2006, Jan Bartel wrote:
>Hi Ceki,
>
>I'm 90% of the way there with the jetty maven plugin. At runtime, I
>check the classpath for commons-logging and then slf4j classes.
>If a user has put commons-logging on to the classpath of the plugin
>(eg via a plugin dependency or via a project dependency) then I
>remove the jcl-over-slf4j and the slf4j-simple jars from the plugin's=20
>classpath as the user is control of their logging. If I can't find a=20
>commons-logging impl, I check for an slf4j impl. Again,
>if the user has specified an impl, I get rid of the default slf4j-simple
>jar from the classpath. If the user hasn't specified any logging, then
>I use the defaults of jcl-over-slf4j and slf4j-simple.
>
>In order to change the classpath of the plugin, I have had to introduce=20
>another URLClassloader as the child of the maven plugin runtime
>classloader. The problem is that the maven classworld classloader is=20
>misbehaving and doesn't delegate correctly on resolution calls
>from the child. I think this is a known problem and will probably be fixed=
=20
>in the next version of maven. However, in the meanwhile
>I am doing some workarounds. I've got a little way to go with the
>workarounds, but I think it will be able to be done.
>
>cheers
>Jan
>Ceki G=FClc=FC wrote:
>>At 12:26 AM 3/21/2006, Jan Bartel wrote:
>>
>>>As for leaving the user to select a log implementation for the plugin,=
 I'd
>>>much rather have it work straight out of the box, but allow the user to
>>>configure a different slf4j logging delegate if they want.
>>
>>+1
>>How do we go from a wish to actually making it happen? Apache Directory=20
>>project faces a similar situation and probably many other projects as=
 well.
>>
>>>cheers
>>>Jan
>
>
>
>-------------------------------------------------------
>This SF.Net email is sponsored by xPML, a groundbreaking scripting language
>that extends applications into web and mobile media. Attend the live=
 webcast
>and join the prime developer group breaking into this new coding territory!
>http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D110944&bid=3D241720&dat=3D1=
21642
>_______________________________________________
>Jetty-support mailing list
>Jet...@li...
>https://lists.sourceforge.net/lists/listinfo/jetty-support

--=20
Ceki G=FClc=FC
http://ceki.blogspot.com/