Fail fast with Typesafe Config

MyAppConfig.scala

import com.typesafe.config.{ Config, ConfigFactory, ConfigException }

import scala.util.control.Exception._

/* At the beginning of app execution load essential configurations and assign
 * them to vals. */
object MyAppConfig {

  private[this] val conf: Config = trapConfig {
    ConfigFactory.load() getConfig "myapp"
  }

  /* the actual configurations are assigned here */

  val port = trapConfig { conf getInt "port" }
  val interface = trapConfig { conf getString "interface" }

  /* Improves error messages on missing configurations, before exiting.
   * Nothing more. */
  private[this] def trapConfig[A](block: => A): A =
    catching(classOf[ConfigException.Missing]) withApply { e =>
      log error {
        s"""|
            |###############################################
            |                    MyApp
            |
            |Could not initialize configurations.
            |You are probably missing a -Doption to the JVM.
            |Or perhaps application.conf isn't in classpath?
            |
            |${e.getMessage}
            |###############################################""".stripMargin
      }
      sys exit 1
    } apply block
}