Java Ninja Chronicles By Norris Shelton

Logback log filtering

We wanted to default logging of all messages to warning and above for libraries that we used. We wanted our code to be logged at the info level and above. There was one specific library class that was logging a warning message that was causing confusion to the junior members of the team. Here is what my logback.xml contains.

• Line 9 – log classes under the com.cdi package at the info level and above
• Line 11 – log this specific class at the error level and above
• Line 13 – default logging of the standard out appender to warnings and above

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true">
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>%d{HH:mm:ss.SSS}|%-5level|%msg||%class:%line %xException{full} %n</Pattern>
        </layout>
    </appender>

    <logger name="com.cdi" level="INFO"/>
    <!--Don't show the warning message for no ViewResolvers-->
    <logger name="org.springframework.web.servlet.view.ContentNegotiatingViewResolver" level="ERROR"/>

    <root level="WARN">
        <appender-ref ref="STDOUT"/>
    </root>
</configuration>

sheltonn December 30th, 2014

Posted In: appender, appender configuration, java ninja, Javaninja, logback, Logging, Logging configuration, slf4j

Tags: appender, appender configuration, java ninja, javaninja, logback, logging, logging configuration, slf4j

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