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https://issues.apache.org/jira/browse/LOG4J2-1010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15346564#comment-15346564
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Remko Popma commented on LOG4J2-1010:
-------------------------------------
In the Scala module, you would define a class, let's call it
ScalaContextDataInjector, that implements ContextDataInjector.
In the implementation of the {{injectContextData(List<Property> props, LogEvent
evt)}} method, this class would obtain key-value pairs from the Scala Context
or Locals, and put those in the LogEvent's CustomData.
There would be some configuration option to tell {{ContextDataInjectorFactory}}
to return {{ScalaContextDataInjector}} objects instead of the default
{{DefaultContextDataInjector}} that Log4j would normally use.
> Injectable context properties
> -----------------------------
>
> Key: LOG4J2-1010
> URL: https://issues.apache.org/jira/browse/LOG4J2-1010
> Project: Log4j 2
> Issue Type: Improvement
> Components: API
> Affects Versions: 2.2
> Reporter: Mikael Ståldal
> Attachments: properties.patch
>
>
> It would be useful to have a way to inject context properties into a
> {{LogEvent}}, as an alternative to {{ThreadContext}}.
> In an asynchronous environment, using ThreadContext as currently implemented
> is not so useful since JVM threads might not be coupled to the logical flow
> of the application.
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