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https://issues.apache.org/jira/browse/ZOOKEEPER-850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12901518#action_12901518
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Olaf Krische commented on ZOOKEEPER-850:
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Hello,
if you still use the log4j logger at runtime, then it should have no impact on
the logging output, since those definitions in log4j.properties for log4j
remain valid.
1)
Add "slf4j-api-1.5.10.jar", its the API for slf4j
2)
For $clazz, replace:
final static org.apache.log4j.Logger =
org.apache.log4j.Logger.getLogger($clazz);
with
final static org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger($clazz);
This must compile, then zookeeper is independend from log4j.
3)
For runtime, e.g. testing, decide which logger to use. For log4j, you would
just add:
- slf4j-log4j12-1.5.10.jar, the adapter from slf4j to log4j
- log4j-1.2.15.jar for log4j, which should already be defined in ant
This would be all.
(patchset is not so easy as i thought, since zookeeper use its very own file
structure, i dont even get 3.3.1 with a normal ant compile to work) :P
> Switch from log4j to slf4j
> --------------------------
>
> Key: ZOOKEEPER-850
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-850
> Project: Zookeeper
> Issue Type: Improvement
> Components: java client
> Reporter: Olaf Krische
>
> Hello,
> i would like to see slf4j integrated into the zookeeper instead of relying
> explicitly on log4j.
> slf4j is an abstract logging framework. There are adapters from slf4j to many
> logger implementations, one of them is log4j.
> The decision which log engine to use i dont like to make so early.
> This would help me to embed zookeeper in my own applications (which use a
> different logger implemenation, but slf4j is the basis)
> What do you think?
> (as i can see, those slf4j request flood all other projects on apache as well
> :-)
> Maybe for 3.4 or 4.0?
> I can offer a patchset, i have experience in such an migration already. :-)
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