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https://issues.apache.org/jira/browse/SLING-3048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770726#comment-13770726
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Carsten Ziegeler commented on SLING-3048:
-----------------------------------------
Is this really useful? It's not spec'ed - so it might be anything and we
already know the request, so we can correlate all entries to exactly this
point. The session will be closed after the request anyway, so it's not
available. I don't think that this adds any useful or additional information
> Filter to populate SLF4J MDC with request details
> -------------------------------------------------
>
> Key: SLING-3048
> URL: https://issues.apache.org/jira/browse/SLING-3048
> Project: Sling
> Issue Type: Improvement
> Components: Extensions
> Reporter: Chetan Mehrotra
> Attachments: org.apache.sling.extensions.mdc-0.0.1-SNAPSHOT-src.zip
>
>
> With Commons Log moving to Logback its possible to use MDC [1] support of
> SLF4J in Sling to get better logs and also enable better filtering of logs.
> The patch adds a new extension module which registers a
> {{MDCInsertingFilter}}. This filter can extract information from incoming
> request and add them to the MDC
> Features supported
> 1. By default expose details like Request path, Query String etc based on [3]
> 2. Exposes OSGi config where one can define what HTTP Header, Parameter or
> Cookie needs to be added to MDC
> 3. Exposes Session ID, USer Information from RequestResolver associated with
> current thread of execution
> This information can then later be exposed via logs like shown below. Here we
> expose the SessionID as part of log
> ---
> %d{dd.MM.yyyy HH:mm:ss.SSS} *%level* [%thread] %logger [%X{jcr.sessionId}]
> %msg%n
> ---
> The same information can also be used to filter logs based on user,url etc or
> used in custom Logging event evaluator
> For more details refer to [2]
> [1] http://www.slf4j.org/manual.html#mdc
> [2] https://github.com/chetanmeh/sling-logback/tree/master/mdc
> [3] http://logback.qos.ch/manual/mdc.html#mis
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