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https://issues.apache.org/jira/browse/SHIRO-391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13482569#comment-13482569
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Jared Bunting commented on SHIRO-391:
-------------------------------------
I like this a lot. If there are no objections, I'll add this patch shortly.
> Enable Principal in Logs using SLF4J MDC
> ----------------------------------------
>
> Key: SHIRO-391
> URL: https://issues.apache.org/jira/browse/SHIRO-391
> Project: Shiro
> Issue Type: Improvement
> Reporter: Jan
> Assignee: Jared Bunting
> Priority: Minor
> Attachments: ThreadContext.java.patch
>
>
> Sometimes it is useful to log the user name. That way it can easily be traced
> which user faced an exception or where an error occurred.
> The Mapped Diagnostic Context (MDC) of SLF4J can be used for that as it uses
> the same mechanisms as Shiro already does. That way one can use
> %{shiroSubject} in the log pattern. This will then be filled with the
> principal name or left blank.
> Remark: No additional libraries or anything are necessary for that. All
> that's needed is SLF4J and that's there already.
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