public GenericResult Exec(TaxaSelicUpdateCommand command)
        {
            TaxaSelicModel model = _repository.GetByAnoeMes(command.Ano, command.Mes);

            if ((model != null) && (model.Id != command.Id))
            {
                command.AddNotification("TaxaSelicModel", "Recurso já existente Id: " + model.Id);
            }


            model = _repository.GetById(command.Id);
            if (model == null)
            {
                command.AddNotification("Id", "Recurso Inexistente");
            }


            command.Validate();
            if (command.Invalid)
            {
                return(new GenericResult(400, "Recurso Inválido", command.Notifications));
            }


            model.Atualizar(command.Ano, command.Mes, command.Valor);

            try
            {
                _repository.Update(model);

                return(new GenericResult(200, "Recurso Atualizado", model));
            }
            catch (System.Exception ex)
            {
                return(new GenericResult(503, ex.GetBaseException().Message, null));
            }
        }