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https://issues.apache.org/jira/browse/LOG4J2-2454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16629846#comment-16629846
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Lipeng commented on LOG4J2-2454:
--------------------------------

thanks, I know what you said. :)

My biz requirements is
Using log4j2, according to the relationship between the configured keywords and 
the team, the log containing the keyword information in the log is stored in a 
separate file, and the processing team of each record is marked.

so I think  add map attribute for log event  is best way. 

thanks

> LogEvent attach a map attribute
> -------------------------------
>
>                 Key: LOG4J2-2454
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-2454
>             Project: Log4j 2
>          Issue Type: Improvement
>            Reporter: Lipeng
>            Priority: Minor
>
> We standardize the alarm base on log4j2, there are trigger rules and alarm 
> handle team on the filter, these information will log to file, then our log 
> analysis module will send mail to the team with the filter configuration. but 
> this information can not be passed to the layout module, so I want to add an 
> attribute to pass information between log4j2 components.  
> example
> <AlarmAppender name="alarm">
>     <Filters>
>         <Alarm>
>             <resolver>[email protected]</resolver>
>             <subject>title1</subject>
>             <priority>1</priority>
>             <expression>^hello.*</expression>
>       </Alarm>
>        <Alarm>
>            <resolver>[email protected]</resolver>
>            <subject>title2</subject>
>            <priority>1</priority>
>            <logLevel>error</logLevel>
>        </Alarm>
>     </Filters>
>  </AlarmAppender>



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