logging - Logback中的记录器级别和阈值过滤器级别有什么区别？

Question

我有一个带有 ThreshholdFilter 的附加程序，级别为 INFO:

<appender name="my_apender" class="com.my.apender.MyAppender">
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>INFO</level>
    </filter>
</appender>

还有一个具有 INFO 级别的记录器:

<logger name="whatever" level="INFO">
    <appender-ref ref="my_appender"/>
</logger>

两个级别之间有什么区别？

Answer 1

为记录器分配的级别是您的记录器使用的级别，而在过滤器 ch.qos.logback.classic.filter.ThresholdFilter 内分配的级别是此附加程序的级别正在记录东西，了解更多 details .

这是一个澄清问题的示例:

<!-- deny all events with a level below INFO, that is TRACE and DEBUG -->
<appender name="my_apender1" class="com.my.apender.MyAppender">
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>INFO</level>
    </filter>
</appender>

<!-- deny all events with a level below DEBUG, that is TRACE-->
<appender name="my_apender2" class="com.my.apender.MyAppender">
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>DEBUG</level>
    </filter>
</appender>

<!-- event with level DEBUG will be handled only by my_apender2, and events with higher levels than DEBUG will be handled by both appenders -->
<logger name="whatever" level="DEBUG">
    <appender-ref ref="my_appender1"/>
    <appender-ref ref="my_appender2"/>
</logger>