Change log level in logback at run time via external property file

Question

I want to change the log level without restarting the server. I use weblogic server. For this I thought to pass the log level from a external file (LOGBackIncludedFile.xml) and give this file path in the logback <include file>. I cannot hard code the path, as the path is different in Dev, UAT, Production. I want to include this file in a location inside Weblogic 12C server. So I can change log level without touching ear file.

<configuration  scan="true"  scanPeriod="30 seconds">

   <include file="../../LOGBackIncludedFile.xml" />
   <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender" >
       <encoder>
         <pattern>%date %-5level [%logger] > %msg%n</pattern>
       </encoder>
  </appender>

  <root level="${root.level:-DEBUG}">          
    <appender-ref ref="STDOUT" />
  </root>  
</configuration>

Below is the LOGBackIncludedFile.xml

<included>
  <property value="INFO" name="root.level"/>
</included>

when I use this existing xml I get this error.

 java.io.FileNotFoundException: /usrXX/appXX/oracle/product/XXX/domains/XXXDomain/../../LOGBackIncludedFile.xml 

My question is how can I set external file path dynamically in the logback.xml. The path should be to the specific weblogic instance. As I put the external file into my instance.

eg : /usrxx/appxx/oracle/product/XXX/domains/xxxDomain/servers/myInstance/

Answer 1

Set the file path as below. This is for weblogic 12C.

 <include optional="true" file="${DOMAIN_HOME}/servers/${SERVER_NAME}/LOGBackIncludedFile.xml" />