hybridServices.scala

trait AuthRepo {
  def create(auth: Author): AuthId
  def retrieve(id: AuthId): Author
  def update(auth: Author): Unit
  def delete(auth: Author): Unit
}

class AuthRepoImpl extends AuthRepo {
  def create(auth: Author) = println(s"create $auth")
  def retrieve(id: AuthId) = {
    println(s"retrieve $id")
    new Author
  }
  def update(auth: Author) = println(s"update $auth")
  def delete(auth: Author) = println(s"delete $auth")
}

trait AuthServ {
  def create(auth: Author): AuthId
  def retrieve(id: AuthId): Author
  def update(auth: Author): Unit
  def delete(auth: Author): Unit
}

class AuthServImpl(authRepo: AuthRepo) extends AuthServ {
  def create(auth: Author) = authRepo.create(auth)
  def retrieve(id: AuthId) = authRepo.retrieve(id)
  def update(auth: Author) = authRepo.update(auth)
  def delete(auth: Author) = authRepo.delete(auth)
}