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https://issues.apache.org/jira/browse/KARAF-2453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14107143#comment-14107143
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Achim Nierbeck commented on KARAF-2453:
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Fix for 3.0.x:
Repository: karaf
Updated Branches:
refs/heads/karaf-3.0.x 940a2d5d8 -> 575ec6d97
[KARAF-2453] - Using features to extend existing configuration
Project: http://git-wip-us.apache.org/repos/asf/karaf/repo
Commit: http://git-wip-us.apache.org/repos/asf/karaf/commit/575ec6d9
Tree: http://git-wip-us.apache.org/repos/asf/karaf/tree/575ec6d9
Diff: http://git-wip-us.apache.org/repos/asf/karaf/diff/575ec6d9
Branch: refs/heads/karaf-3.0.x
Commit: 575ec6d97be6575c58ca236ccbed6ad25ab11c1a
Parents: 940a2d5
> Using features to extend existing configuration
> -----------------------------------------------
>
> Key: KARAF-2453
> URL: https://issues.apache.org/jira/browse/KARAF-2453
> Project: Karaf
> Issue Type: Improvement
> Components: karaf-config, karaf-feature
> Reporter: Jan Bernhardt
> Assignee: Achim Nierbeck
> Priority: Minor
> Fix For: 4.0.0, 3.0.2, 2.4.1
>
>
> for me it looks like that there is currently no way to extend an existing
> configuration file by installing a feature. But this is, what I would need
> for my use case and what would be great IMHO for other users as well.
> Here is my idea.
> If a property already exists within a configuration file this property should
> not be changed. But if a configuration file does not contain a certain key,
> this key=value should be added at the end of the configuration file.
> Example:
> <config name="com.foo.bar">
> myProperty = myValue
> </config>
> If com.foo.bar.cfg does not contain myProperty before the feature containing
> this example was installed, then myProperty=myValue should be added to
> com.foo.bar.cfg file.
> This would make it possible to extend existing configuration files for custom
> needs. A general use-case could be logging. My application would like to add
> a logger configuration in case this logger is not configured already.
> 2. Example
> <config name="org.ops4j.pax.logging">
> log4j.logger.org.apache.activemq.broker.util.LoggingBrokerPlugin=INFO,
> stdout, osgi:VmLogAppender
> </config>
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