Overriding logback configurations
I had a similar problem to which this answer seems the best approach.
In my case, I needed to override the included file to completely turn off one of the appenders.
Using the a variable for the log level value, one can change it to OFF.
<included>
(...)
<root level="${root.level.console:-DEBUG}">
<appender-ref ref="CONSOLE" />
</root>
<root level="${root.level.file:-DEBUG}">
<appender-ref ref="FILE" />
</root>
</included>
As stated in http://logback.qos.ch/manual/configuration.html#rootElement
<configuration>
<include resource="base.xml" />
(...)
<property name="root.level.console" value="OFF" />
</configuration>
I don't think that you can overwrite logback.xml
-definitions from an included file.
But I have an approach that solves your question regarding overriding the root-logger-level, using variable substitution with default values:
logback.xml
<configuration>
<include file="includedFile.xml" />
<!-- STDOUT appender stuff -->
<root level="${root.level:-DEBUG}">
<appender-ref ref="STDOUT" />
</root>
<configuration>
includedFile.xml
<included>
<!-- override the default value; or comment out to leave it at default -->
<property name="root.level" value="INFO" />
</included>
With that concept, I've even been able to control the output to multiple appenders from the included file:
logback.xml
<configuration>
<include file="includedFile.xml" />
<!-- STDOUT appender stuff -->
<appender name="FILE" class="ch.qos.logback.core.FileAppender">
<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>${file.level:-ALL}</level>
</filter>
<file>/path/to/logfeil.log</file>
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<appender name="SYSLOG" class="ch.qos.logback.classic.net.SyslogAppender">
<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>${syslog.level:-OFF}</level>
</filter>
<syslogHost>localhost</syslogHost>
<facility>${syslog.facility:-LOCAL1}</facility>
<suffixPattern>${syslog.pattern:-[%thread] %logger{36} - %msg}</suffixPattern>
</appender>
<logger name="my.package" level="${logging.level:-INFO}" additivity="false">
<appender-ref ref="FILE" />
<appender-ref ref="SYSLOG" />
</logger>
<root level="${root.level:-DEBUG}">
<appender-ref ref="STDOUT" />
</root>
<configuration>
And in the includedFile.xml
I can control if, and at what level message shall pass through the appenders FILE
and SYSLOG
, setting the properties file.level
, syslog.level
and of course logging.level
.