ServiceStack IService<> 错误处理

Question

We have successfully implemented the ServiceStack IService<> interface and have it communicating with an iPhone but we are unsure of the best way to implement our exception handling and logging.

public class AddCarService : IService<AddCar> 
{

    public UnitOfWork UnitOfWork { get; set; }

    public object Execute(AddCar request)
    {
        try
        {
            PersonBo person;
            if (UnitOfWork.PersonService.ValidateSession(request.SessionGuid, out person))
            {
                var car = new CarBo
                {
                    PersonId = person.PersonId,
                    Name = request.Car.Name,
                    RegistrationNumber = request.Car.RegistrationNumber,
                    IsActive = true,
                    IsDeleted = false
                };
                UnitOfWork.CarService.Add(car);
                var cars = UnitOfWork.CarService.GetCarByPersonId(person.PersonId);
                var mobileCars = cars.Select(carBo => new Car { CarId = carBo.CarId, Name = carBo.Name, RegistrationNumber = carBo.RegistrationNumber }).ToList();
                return new GetCarResponse { Cars = mobileCars, Status = ResponseStatus.Ok };
            }
            return new GetCarResponse { Cars = null, Status = ResponseStatus.Unauthorised };
        }
        catch (Exception ex)
        {
            UnitOfWork.Logging.Error("AddCarService", ex);
            return new GetCarResponse { Cars = null, Status = ResponseStatus.Exception };
        }
    }
}

Adding a try/catch has quite a performance penalty so we wondered if there was a function build into the ServiceStack framework to support what we are trying to achieve and still return a well formed response to the iPhone.

Answer 1

If you inherit from ServiceBase<T> instead of implementing IService<T> you get this for free (returning a well formed response), but if you take a look at the ServiceBase<T> class , you will see that this is done by wrapping the code in a try-catch block.

I don't think you will get much more than this from ServiceStack.

Answer 2

If you're using ServiceStack's New API you can generically handle exceptions by implementing your own ServiceRunner. With the old API you need to override HandleException() in a custom base class that inherits from ServiceBase<T> or RestServiceBase<T> .

See this previous answer for more details .