How do I configure Logback to print out the class name

Question

I\'m using Play 2.1. I\'m using the default logger play.api.Logger. I\'m confused about how it works.

In my scala code, a line in class \"com.myapp.tickets\" in th

Answer 1

I'm in the process of abandoning the single application.log approach that Play seems to default to with its Logger. My application requires the kind-of fine grained logging and runtime adjustment of it that straight-up logback does so well when classname == Logger name. I've had pretty good success going just "old school" in my controllers like...

package controllers
import play.api._
import play.api.mvc._
import org.slf4j.LoggerFactory

object Application extends Controller {
  val log = LoggerFactory.getLogger(getClass())

  def index = Action {
    log.trace("index")
    NotFound
  }

  def hb = Action {
    log.trace("hb")
    val message = makeMessage()
    log.info(message)
    Ok(message)
  }

  def makeMessage(): String = {
    val version = "@buildsig.version@"
    val tag = "@buildsig.tag@"
    val timestamp = "@buildsig.timestamp@"
    val status = makeStatus()
    return "DM2 [Version: %s] [Build: %s] [Date: %s] [Status: %s]".format(version, tag, timestamp, status)
  }

  def makeStatus(): String = {
    // TODO: Implement datastore healthcheck
    return "TODO"
  }
}

For any developer used to slf4j/logback or log4j, this approach will seem familiar. On the other hand, I am currently struggling through start shell script from "play dist" fails to locate logger.xml in JAR file where by the start script is failing to use my conf/logger.xml that gets JARed up by the "play dist" command.

If I was just a little bit better of a Scala developer, I think the same effect can be achieved with something like a Logging trait.