logback externalization

Question

Currently I have logback configuration file i.e logback.xml which is src/main/resources. I want to set the logging level but i want control outside of

Answer 1

One way that it worked for us was to externalize the configuration file like below. Ignore the spring profiles part if that doesn't apply to you. So as soon as you update the configuration in logback-include.xml, let's say by changing root level to info, the application picks it up within 30 seconds (configurable).

Reference: https://logback.qos.ch/manual/configuration.html#fileInclusion

web.xml
We used spring profiles, but it works even without it.

    
        spring.profiles.active
        dev
    
    
        ch.qos.logback.ext.spring.web.LogbackConfigListener
    
    
        logbackConfigLocation
        classpath:properties/${spring.profiles.active}/logback.xml 
 
 
    

logback.xml (in the classpath)
Note the debug="true" which will tell you when the configuration is updated.

logback-include.xml (external location) Note the use of instead of configuration. Don't miss this part!

        
            ${logfile-path}/log-file.log
            
                
                logFile.%d{yyyy-MM-dd}.log
                
                7
            
            
                %date [%thread] %-5level %logger{35} - %msg%n