Set up JSON-formatted logging

To support JSON logging, you must modify file log4j2.xml and add a JSONDailyFile logger.

Procedure

In Guidewire Studio, open file log4j2.xml for editing.
Find the <RollingFile> element for the Daily File Log, for example:
```
<RollingFile name="DailyFileLog" ... >
```

Directly underneath the Daily File Log entry, add a <RollingFile> element for JSON logging, for example:

<RollingFile name="JSONDailyFileLog" fileName="${guidewire.logDirectory}/PolicyCenter.json"
      filePattern="${guidewire.logDirectory}/PolicyCenter.json%d{.yyyy-MM-dd}">
  <JSONLayout eventEol="true" compact="true" properties="true"/>
  <TimeBasedTriggeringPolicy/>
</RollingFile>

Find the <Root> element (underneath the <Loggers> element) and add a JSONDailyFileLog entry, for example:

<Root level="info">
  <AppenderRef ref="Console"/>
  <AppenderRef ref="DailyFileLog"/>
  <AppenderRef ref="JSONDailyFileLog"/>
</Root>