[writing-async-app-in-scala-part-1] regular sync web application example

RegularSyncWebApplication.scala

def validateRequest(request: Request): Unit = {
  require(request != null)
}

def regularRpcEndpoint(request: Request): Response = {
  validateRequest(request)

  if (!isPermittedViaRpc) {
    throw new PermissionDeniedException("...")
  }

  val fromDb = retrieveFromDatabase(request.id)
  val payload = convertPayloadFromDb(fromDb)
  Response(payload)
}