logback-spring.xml

<?xml version="1.0" encoding="UTF-8" ?>
<configuration debug="true">
  <!-- great reference : http://qiita.com/rubytomato@github/items/93770f827e46cc7e684f -->

  <!-- http://docs.spring.io/spring-boot/docs/1.4.2.RELEASE/reference/htmlsingle/#howto-logging -->
  <include resource="org/springframework/boot/logging/logback/base.xml"/>

  <property name="LOG_DIR" value="./log" />
  <property name="COMMON_PATTERN" value="%d{ISO8601} [%thread] %level %logger - %msg%n" />

  <appender name="CONSOLE_LOG" class="ch.qos.logback.core.ConsoleAppender">
    <target>System.err</target>
    <encoder>
      <pattern>${COMMON_PATTERN}</pattern>
    </encoder>
  </appender>

  <appender name="FILE0" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${LOG_DIR}/file0.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
      <fileNamePattern>${LOG_DIR}/file0_%i.log</fileNamePattern>
        <minIndex>1</minIndex>
        <maxIndex>5</maxIndex>
    </rollingPolicy>
    <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
      <maxFileSize>1KB</maxFileSize>
    </triggeringPolicy>
    <encoder>
      <pattern>${COMMON_PATTERN}</pattern>
    </encoder>
  </appender>

  <appender name="FILE1" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${LOG_DIR}/file1.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
      <fileNamePattern>${LOG_DIR}/file1_%i.log</fileNamePattern>
        <minIndex>1</minIndex>
        <maxIndex>5</maxIndex>
    </rollingPolicy>
    <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
      <maxFileSize>1KB</maxFileSize>
    </triggeringPolicy>
    <encoder>
      <pattern>${COMMON_PATTERN}</pattern>
    </encoder>
  </appender>

  <appender name="FILE2" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${LOG_DIR}/file2.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
      <fileNamePattern>${LOG_DIR}/file2_%i.log</fileNamePattern>
        <minIndex>1</minIndex>
        <maxIndex>5</maxIndex>
    </rollingPolicy>
    <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
      <maxFileSize>1KB</maxFileSize>
    </triggeringPolicy>
    <encoder>
      <pattern>${COMMON_PATTERN}</pattern>
    </encoder>
  </appender>

  <logger name="logbacktest.logger" level="INFO">
    <appender-ref ref="CONSOLE_LOG"/>
    <appender-ref ref="FILE0"/>
  </logger>

  <logger name="logbacktest.logger.file1" level="DEBUG" additivity="false">
    <appender-ref ref="FILE1"/>
  </logger>

  <logger name="logbacktest.logger.file2" level="TRACE">
    <appender-ref ref="FILE2"/>
  </logger>

</configuration>