SLF4J - Logback: How to configure loggers in runtime?

Question

we are using LogBack with our project, I want to configure logger according to some Data Base values, i.e If some DB value is set to true, then logger should use both file and DB appenders, if it's false so logger must use only DB appender,

I also want to preserve using static final loggers, so I won't create a new instance each time logger is called,

so how could I do something like this?

Regards,

Answer 1

You should configure Logback programmatically as described in this example.

public class Main {

   public static void main(String[] args) {
     Logger logger = (Logger) LoggerFactory.getLogger("abc.xyz");

     LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
     FileAppender<LoggingEvent> fileAppender =
                       (FileAppender<LoggingEvent>) logger.getAppender("file");
     if(fileAppender != null) {
       fileAppender.stop();
       fileAppender.setFile("new.log");
       PatternLayout pl = new PatternLayout();
       pl.setPattern("%d %5p %t [%c:%L] %m%n)");
       pl.setContext(lc);
       pl.start();
       fileAppender.setLayout(pl);
       fileAppender.setContext(lc);
       fileAppender.start();
     }
     ... etc    
   }
}