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<configuration debug="true">

    <property name="HOME_LOG" value="logs/app.log"/>

    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                %d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n
            </Pattern>
        </layout>
    </appender>

    <appender name="FILE-ROLLING" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${HOME_LOG}</file>

        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>logs/archived/app.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
            <!-- each archived file, size max 10MB -->
            <maxFileSize>10MB</maxFileSize>
            <!-- total size of all archive files, if total size > 20GB, it will delete old archived file -->
            <totalSizeCap>20GB</totalSizeCap>
            <!-- 60 days to keep -->
            <maxHistory>60</maxHistory>
        </rollingPolicy>

        <encoder>
            <pattern>%d %p %c{1.} [%t] %m%n</pattern>
        </encoder>
    </appender>

    <!-- https://logback.qos.ch/manual/appenders.html#AsyncAppender -->
    <!-- AsyncAppender will drop events of level TRACE, DEBUG and INFO if its queue is 80% full -->
    <appender name="ASYNC" class="ch.qos.logback.classic.AsyncAppender">
        <appender-ref ref="FILE-ROLLING" />
        <!-- defaulr 256 -->
        <queueSize>512</queueSize>
    </appender>

    <logger name="com.mkyong" level="debug" additivity="false">
        <appender-ref ref="ASYNC"/>
        <appender-ref ref="CONSOLE"/>
    </logger>

    <root level="error">
        <appender-ref ref="CONSOLE"/>
    </root>

</configuration>