conf/log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 Alternative log4j config. Sending data to files in the `logs` directory.

 # Usage

 ```
 $ java -Dlog4j.configurationFile=conf/log4j2.xml -jar target/standalone.jar
 ```

 # Description

 Outputs data to three log files:

 1. app.log: this is the primary log file for the application.
 2. client.log: this is an access.log for client requests.
 3. server.log: this is an access.log for server requests.

 Files will be rotated to an `archive` sub directory based on both
 time and size. Keeps up to 168 files of at most 200MB.
-->
<Configuration monitorInterval="5" status="warn" shutdownHook="disable">
  <Properties>
    <Property name="logDir">logs</Property>
    <Property name="logArchiveDir">logs/archive</Property>
    <Property name="rolledSuffix">%d{yyyyMMdd'_'HH}00_%i.lg.gz</Property>
    <Property name="dfltPattern">%d{yyyy-MM-dd'T'HH:mm:ss.SSS} %-5level [%t] %class: %msg%n</Property>
  </Properties>
  <Appenders>
    <Spectator name="Spectator"/>
    <RollingFile name="Main"
        fileName="${logDir}/app.log"
        filePattern="${logArchiveDir}/app_${rolledSuffix}">
      <PatternLayout pattern="${dfltPattern}"/>
      <Policies>
        <TimeBasedTriggeringPolicy />
        <SizeBasedTriggeringPolicy size="200 MB"/>
      </Policies>
      <DefaultRolloverStrategy max="168"/> <!-- 1 week if one file per hour -->
    </RollingFile>
    <RollingFile name="Server"
        fileName="${logDir}/server.log"
        filePattern="${logArchiveDir}/server_${rolledSuffix}">
      <PatternLayout pattern="${dfltPattern}"/>
      <Filters>
        <MarkerFilter marker="http-server" onMatch="ACCEPT" onMismatch="DENY"/>
      </Filters>
      <Policies>
        <TimeBasedTriggeringPolicy />
        <SizeBasedTriggeringPolicy size="200 MB"/>
      </Policies>
      <DefaultRolloverStrategy max="168"/> <!-- 1 week if one file per hour -->
    </RollingFile>
    <RollingFile name="Client"
        fileName="${logDir}/client.log"
        filePattern="${logArchiveDir}/client_${rolledSuffix}">
      <PatternLayout pattern="${dfltPattern}"/>
      <Filters>
        <MarkerFilter marker="http-client" onMatch="ACCEPT" onMismatch="DENY"/>
      </Filters>
      <Policies>
        <TimeBasedTriggeringPolicy />
        <SizeBasedTriggeringPolicy size="200 MB"/>
      </Policies>
      <DefaultRolloverStrategy max="168"/> <!-- 1 week if one file per hour -->
    </RollingFile>
  </Appenders>
  <Loggers>
    <Logger name="com.netflix.spectator.sandbox.HttpLogEntry" level="debug" additivity="false">
      <AppenderRef ref="Server"/>
      <AppenderRef ref="Client"/>
      <AppenderRef ref="Spectator"/>
    </Logger>
    <Logger name="com.netflix.iep" level="debug"/>
    <Logger name="com.netflix.spectator.gc.GcLogger" level="debug"/>
    <Root level="info">
      <AppenderRef ref="Main"/>
      <AppenderRef ref="Spectator"/>
    </Root>
  </Loggers>
</Configuration>