java-chassis-samples/metrics-write-file-sample/metrics-write-file/src/main/resources/sample-log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
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<Configuration status="INFO">
  <Appenders>
    <Console name="stdout" target="SYSTEM_OUT">
      <PatternLayout pattern="%d [%level] [%thread] - %msg (%F:%L\)%n"/>
    </Console>

    <Routing name="cloudEyeRouting">
      <Routes pattern="$${ctx:fileName}">
        <Route>
          <File name="cloudEyeAppender-${ctx:fileName}" append="true"
            fileName="${sys:cloudEye.logDir}/${ctx:fileName}">
            <PatternLayout>
              <Pattern>%msg%n</Pattern>
            </PatternLayout>
          </File>
        </Route>
      </Routes>
    </Routing>
  </Appenders>

  <Loggers>
    <Root level="info">
      <AppenderRef ref="stdout"/>
    </Root>

    <Logger name="cloudEyeLogger" level="info" additivity="false">
      <Appender-ref ref="cloudEyeRouting"/>
    </Logger>
  </Loggers>
</Configuration>