src/site/antora/modules/ROOT/examples/manual/configuration/scripts.xml

<?xml version="1.0" encoding="UTF-8"?>
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<Configuration xmlns="https://logging.apache.org/xml/ns"
               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xsi:schemaLocation="
                   https://logging.apache.org/xml/ns
                   https://logging.apache.org/xml/ns/log4j-config-2.xsd">
  <Appenders>
    <Console name="STDOUT">
      <PatternLayout>
        <ScriptPatternSelector defaultPattern="%d %p %m%n">
          <ScriptRef ref="SELECTOR_SCRIPT"/>
          <PatternMatch key="NoLocation" pattern="[%-5level] %c{1.} %msg%n"/>
          <PatternMatch key="Flow"
                        pattern="[%-5level] %c{1.} ====== %C{1.}.%M:%L %msg ======%n"/>
        </ScriptPatternSelector>
      </PatternLayout>
    </Console>
  </Appenders>
  <Loggers>
    <Logger name="EventLogger">
      <ScriptFilter onMatch="ACCEPT" onMismatch="DENY">
        <Script name="EVENT_LOGGER_FILTER" language="groovy"><![CDATA[
          if (logEvent.getMarker() != null
              && logEvent.getMarker().isInstanceOf("FLOW")) {
            return true;
          } else if (logEvent.getContextMap().containsKey("UserId")) {
            return true;
          }
          return false;
          ]]>
        </Script>
      </ScriptFilter>
    </Logger>
    <Root level="INFO">
      <ScriptFilter onMatch="ACCEPT" onMismatch="DENY">
        <ScriptRef ref="ROOT_FILTER"/>
      </ScriptFilter>
      <AppenderRef ref="STDOUT"/>
    </Root>
  </Loggers>
  <Scripts>
    <Script name="SELECTOR_SCRIPT" language="javascript"><![CDATA[
      var result;
      if (logEvent.getLoggerName().equals("JavascriptNoLocation")) {
        result = "NoLocation";
      } else if (logEvent.getMarker() != null
          && logEvent.getMarker().isInstanceOf("FLOW")) {
        result = "Flow";
      }
      result;
      ]]>
    </Script>
    <ScriptFile name="ROOT_FILTER" path="scripts/filter.groovy"/>
  </Scripts>
</Configuration>