[slf4j-dev] is there anyone out there?

[Niclas Hedhman]

On Thursday 05 May 2005 04:53, robert burrell donkin wrote:
> > Robert also mentioned the child logger management being part of the
> > application framework's concern space. I would like to highlight that it
> > is not desirable that the addChildLogger() is exposed in the Logger
> > interface, but through some other well-define management interface, to
> > avoid client abuse. This is perhaps not within the scope of this project.
>
> interesting :)
>
> requests for this kind of thing came along a number of times. could you
> expand a little (to make sure i understand correctly)?

I am mostly involved in IoC-styled component frameworks, and in such the 
container will provide the Logger to the component, and the component should 
not try to establish its own Logger (which is typically done in Log4J by 
classname hierarchies).

Instead, the container has a structural model of the entire application, and 
will hand a Logger to each component that is represented by such hierarchy.

Example;

<component name="House" class="org.hedhman.niclas.House" >
  <component name="Floor1" class="org.hedhman.niclas.Floor" >
    <component name="Room1" class="org.hedhman.niclas.Room" />
    <component name="Room2" class="org.hedhman.niclas.Room" />
    <component name="Room3" class="org.hedhman.niclas.Room" />
  </component>
  <component name="Floor2" class="org.hedhman.niclas.Floor" >
    <component name="Room1" class="org.hedhman.niclas.Room" />
    <component name="Room2" class="org.hedhman.niclas.Room" />
    <component name="Room3" class="org.hedhman.niclas.Room" />
  </component>
</component>

The container will construct the Loggers hierarchical to the above structure. 
Loggers will be;
House
House.Floor1
House.Floor1.Room1
House.Floor1.Room2
House.Floor1.Room3
House.Floor2
House.Floor2.Room1
House.Floor2.Room2
House.Floor2.Room3

And it will make a lot more sense in production environments to organize 
logging events according to this instead of package.class names.



I hope this expresses our usage pattern clearly enough.


Cheers
Niclas