SLF4J Log Level as an argument.

Question

Hi,

We are looking to use SLF4J, but one thing we found was that you can't specify the level as an argument, i.e

Logger.log(Level.INFO, "messsage");

You have to do this

logger.info("message");

this prevents being able to pass everything through a method, so you can tack other properties to all log messages in a class.

public class Test
{
    public Test(SomeObj obj)
    {
       log(Level.INFO, "message");
    }

    public void anotherMethod()
    {
       log(Level.DEBUG, "another message");
    }
    private void log(Level level, String message)
    {
        logger.log(level, message + obj.someString());
    }
}

Is there a way to achieve this using SLF4j ?

Answer 1

The answer is No. Refer to this discussion.

Answer 2

Write a wrapper around the slf4j call and create your own enum for the six log levels. Then in your wrapper, use a switch to call the correct slf4j call.

void myLog(Level level, String message)
{
  switch (level)
  {
  case FATAL:
    log.fatal(message);
    break;
  case ERROR:
    log.error(message);
    break;
  ....
  }
}