CODEWITHSUNDEEP
javaslf4jlogback
Amr Faisal
Amr Faisal

Reputation: 2034

SLF4J - Logback: How to configure loggers in runtime?

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,

Upvotes: 27

Views: 33612

Answers (2)

fglez
fglez

Reputation: 8552

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    
   }
}

Upvotes: 19

Andy Dufresne
Andy Dufresne

Reputation: 6190

Is there a specific reason behind reading the configuration property from the database? One suggestion would be to use JNDI. Logback can read JNDI configured values using the tag.

Upvotes: 1

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