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https://issues.apache.org/jira/browse/JDKIM-2?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13539738#comment-13539738
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Stefano Bagnara commented on JDKIM-2:
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About logging frameworks I still think the same things I wrote in the one year
old thread Eric linked in his comment.
"slf4j instead of commons-logging since the later creates issues with
class-loaders in general and OSGi in particular.": IMHO this is a myth
nowadays, anyway I mostly used commons-logging by injecting the logger
instances in the classes so the classloader didn't apply at all.
That said, jDKIM is a very slim library and using it I found it is stable and I
never needed logging at all.
Since opening this issue I guess I removed the System.out calls and improved
some exceptions.
Unless some user ask for some specific thing to be logged I think we should
simply close this issue as won't fix.
I found myself using the Observer pattern almost everywhere instead of a
logging framework when writing libraries. This way you don't introduce a new
dependency and you give much more power to the library users. I said "Observer
pattern" but in fact I use something simpler, without the need to keep a
listener registry. Simply create an eventlistener interface including
meaningful methods for your domain and then let your classes "receive"
implementations for this listener in their constructor or exposing a setter,
then invoke it with if (listener != null) listener.itJustHappened().
> Add logging with commons logging
> --------------------------------
>
> Key: JDKIM-2
> URL: https://issues.apache.org/jira/browse/JDKIM-2
> Project: James jDKIM
> Issue Type: Improvement
> Components: library
> Affects Versions: 0.2
> Reporter: Stefano Bagnara
> Assignee: Stefano Bagnara
> Fix For: 1.0
>
>
> Currently there are some System.out and exception based logging. Maybe real
> logging is better at least for some component.
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