Try with result

gistfile1.txt

object Try {

  /**
   * Tries to execute body.
   *
   * Example below tries to start template and if it's unsuccessful it stops context.
   * <pre> Try(template.start()) otherwise context.stop() </pre>
   *
   * @param body block of code to execute.
   * @return Ok, if no exception is thrown by body.
   * @return Failed, if exception was thrown by body.
   *
   */
  def apply[A](body: ⇒ A): Result[A] =
    try {
      Ok[A](body)
    } catch {
      case e ⇒ Failed[A](e)
    }

  sealed trait Result[A] {
    def otherwise(onError: ⇒ Unit): A
  }

  private[this] case class Ok[A](result :A) extends Result[A]{
    def otherwise(onError: => Unit) : A = result
  }

  private[this] case class Failed[A](e: Throwable) extends Result[A] {
    def otherwise(onError: ⇒ Unit) : A = {
      safe(onError)
      throw e
    }
  }

  /**
   * Executes the block and swallows the exception.
   */
  @inline def safe(block: ⇒ Unit) {
    try {
      block
    } catch { case e ⇒ {}}
  }

}