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From Castor <ygorcas...@gmail.com>
Subject Re: Experiences with karaf and liquibase?
Date Fri, 26 May 2017 20:27:52 GMT
Exactly! It's a classpath problem, liquibase uses a weird approach to swap
his crappy log system to use slf4j, it scans a classpath and "swaps" the
reference. When you install liquibase and liquibase-slf4j as separated
bundles, the liquibase bundle does not look for the liquibase-slf4j
exported packages, and when you make the liquibase-slf4j a fragment of
liquibase, the liquibase bundle can scan the liquibase-slf4j classpath.

This happens quite a lot when you work with libraries that works with
classpaths and weren't created with osgi in mind, a pain in the a** if you
ask me.

Em sex, 26 de mai de 2017 às 16:49, Steinar Bang [via Karaf] <
ml+s922171n4050472h80@n3.nabble.com> escreveu:

> >>>>> Castor <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=4050472&i=0>>:
> > Hello Steinar! I'm using liquibase in karaf for some time, and to fix
> that
> > you need to repackage the liquibase-slf4j for it to be a fragment of the
> > liquibase bundle. Here's how:
> > https://gist.github.com/YgorCastor/44fb3a13520d28aa328c4975f8bf5e8c
> [snip!]
> Right! Thanks! Fragments have always been a mystery to me...:-)
> Any idea why thi will work and the more regular OSGi ways don't work?
> Something to do with classloaders...?
> > You can also do the same thing using the wrap protocol, without the need
> to
> > repackage liquibase-slf4j, but i remember i had some problems with that,
> i
> > don't recall what happened.
> I've tried using the wrap protocol in karaf with the existing
> liquibase-slf4j maven dependency but that didn't work.
> And what I have now is similar: I've subclassed AbstractLogger in a
> class residing in package liquibase.ext.logging.
> This works in the unit tests, but not in an OSGi context.
> The bundle exports the liquibase.ext.logging
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