Scaled down Logger implementation of VictorOps unified logging.

scala_unified_logging-logger.scala

trait Logger {
  final protected def format(t: Throwable, msg: => String, variables: LogVariables): String
  
  final def format(msg: => String, variables: LogVariable*): String
  final def info(msg: => String, variables: LogVariable*): Unit = if (isInfoEnabled) logInfo(format(msg, variables))
  // ...
  final def error(msg: => String, variables: LogVariable*): Unit = if (isErrorEnabled) logError(format(msg, variables))
  final def error(t: Throwable, msg: => String, variables: LogVariable*) = if (isErrorEnabled) logError(t, format(t, msg, variables))
  
  
  // Here down requires implementation per Logger type: ClassLogger & ActorLogger
  def getName: String
  def classLogVariables: LogVariables
  
  def isInfoEnabled: Boolean
  // ...
  def isErrorEnabled: Boolean
  
  protected def logInfo(msg: String): Unit
  // ...
  protected def logError(msg: String): Unit
  protected def logError(t: Throwable, msg: String): Unit
}