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https://issues.apache.org/jira/browse/LOG4J2-2936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Volkan Yazici resolved LOG4J2-2936.
-----------------------------------
Fix Version/s: 2.14.0
Assignee: Volkan Yazici
Resolution: Fixed
> Add message parameters in JsonLayout
> ------------------------------------
>
> Key: LOG4J2-2936
> URL: https://issues.apache.org/jira/browse/LOG4J2-2936
> Project: Log4j 2
> Issue Type: New Feature
> Components: Layouts
> Affects Versions: 2.13.3
> Reporter: Diego Pettisani
> Assignee: Volkan Yazici
> Priority: Major
> Labels: JsonLayout
> Fix For: 2.14.0
>
>
> By using the JsonLayout the following call:
>
> {code:java}
> String invoiceNo = "A12345";
> long duration = 3999l;
> LOGGER.info("Invoice {} elaborated in {} milliseconds", invoceNo,
> duration);{code}
> will produce something like this:
>
> {code:json}
> { // ...
> "message" : "Invoice A12345 elaborated in 3999 milliseconds"
> // ...
> }{code}
> And for extracting the {{invoceNo}} and {{duration}} values from a log
> collector tool (e.g. Elastic) it is needed to play with patterns and regex
> hard to maintain in the log shipper (e.g. Fluentd).
> It could be very helpful to add a new boolean configuration property in the
> JsonLayout element in order to enable the printing of the message parameters
> as Json fields.
> After enabled this new property (e.g. {{parameters=true}}), the output JSON
> should be something like this:
> {code:json}
> { // ...
> "message" : "Invoice A12345 elaborated in 3999 milliseconds"
> "params" : {
> "p0" : "A12345"
> "p1" : "3999"
> }
> // ...
> }{code}
> In this way, it will be possible to extract that values very easily from the
> log collector tool, without implementing ad-hoc pattern/regex in the log
> shipper.
> This feature could be especially useful for legacy code hard to change that
> uses SLF4J APIs for logging: extracting values from that kind of messages
> will be a piece of cake.
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