logback-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <property name="LOGS" value="./logs"/>

    <appender name="Console"
              class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                %black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%C{1.}): %msg%n%throwable
            </Pattern>
        </layout>
    </appender>

    <appender name="RollingFile"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${LOGS}/groupdocs-viewer-spring.log.txt</file>
        <encoder
                class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <Pattern>%d %p %C{1.} [%t] %m%n</Pattern>
        </encoder>

        <rollingPolicy
                class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- rollover daily and when the file reaches 10 MegaBytes -->
            <fileNamePattern>${LOGS}/archived/groupdocs-viewer-spring-%d{yyyy-MM-dd}.%i.log.txt
            </fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy
                    class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>10MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
    </appender>

    <!-- LOG everything at INFO level -->
    <root level="INFO">
        <appender-ref ref="RollingFile"/>
        <appender-ref ref="Console"/>
    </root>

    <logger name="com.groupdocs.viewer" level="WARN" additivity="false">
        <appender-ref ref="RollingFile"/>
        <appender-ref ref="Console"/>
    </logger>

    <logger name="com.groupdocs.ui" level="INFO" additivity="false">
        <appender-ref ref="RollingFile"/>
        <appender-ref ref="Console"/>
    </logger>

</configuration>