How to change root logging level programmatically for logback

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Try this:

import org.slf4j.LoggerFactory;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;

Logger root = (Logger)LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME);
root.setLevel(Level.INFO);

Note that you can also tell logback to periodically scan your config file like this:

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

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