Set log level for scala-logging

Question

My console app takes a log-level=<LEVEL> option. Looking at some examples in Java, it looks like changing SLF4J logger level is generally possible, but with scala-logging library it seems like this is not the case - regardless of how I create the logger it doesn't have setLevel method available. Any suggestions?

Answer 1

The library needs a logging backend (you can check out the prerequisites). Once you define it, you can set the logging level via a configuration file, for example:

// src/main/resources/logback.xml
<configuration>    
  <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender"/>

  <root level="debug">
    <appender-ref ref="stdout"/>
  </root>
</configuration>

This will result in setting the log level to DEBUG for that particular logger. Anyway, this should work if you're using the slf4j backend. I hope this helps you.

Answer 2

Based on this answer I used this piece of code and it did the work for me:

import ch.qos.logback.classic.{Level,Logger}
import org.slf4j.LoggerFactory

LoggerFactory
  .getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME)
  .asInstanceOf[Logger]
  .setLevel(Level.INFO)