JsonEncoder pattern layout

[rajivharris]

I want to log only selected fields in the new JsonEncoder. Not able to find documentation or examples.
How can we select fields and customize filed names?
Any help is appreciated.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration>

<configuration>
    <import class="ch.qos.logback.classic.encoder.JsonEncoder" />
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">    
        <encoder class="ch.qos.logback.classic.encoder.JsonEncoder">
            <!--something like this -->
            <fieldNames>
                <timestamp>timestamp</timestamp>
                <message>message</message>
            </fieldNames>
        </encoder>
               
    </appender>
    <root level="INFO" >        
        <appender-ref ref="STDOUT" />
    </root>

    <logger name="org.springframework" level="INFO" />
    <logger name="org.springframework.web" level="INFO"/>
</configuration>

[ceki]

Field names are not customizable. However, with commit 9078f68 you can enabled/disable output of any json member.