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https://issues.apache.org/jira/browse/LOG4J2-249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13653421#comment-13653421
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Ralph Goers commented on LOG4J2-249:
------------------------------------

That is a great idea!  Feel free to provide a patch if one of us here can't get 
to it first.
                
> Log4jContextListener: Support property substitution in context-params
> ---------------------------------------------------------------------
>
>                 Key: LOG4J2-249
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-249
>             Project: Log4j 2
>          Issue Type: Improvement
>    Affects Versions: 2.0-beta5
>            Reporter: Tim Tucker
>            Priority: Minor
>
> Similar to the property substitution options offered in log4j2.xml, it would 
> be useful to allow for property substitution in the context-params for 
> configuring Log4jContextListener.
> For example, we'd like to be able to do the following:
> <context-param>  
>     <param-name>log4jConfiguration</param-name>
>     <param-value>${env:myVar}.log4j2.xml</param-value>
> </context-param>
> And have the value of myVar replaced at runtime.
> (in our case, we have integration / production systems that have 1 
> environment variable set that controls the behavior of multiple deployed 
> applications, each of which have different config files for each environment)

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