CODEWITHSUNDEEP
c#.netdependency-injectionservicestackinversion-of-control
Viesturs Gribulis
Viesturs Gribulis

Reputation: 331

Resolving interface with generic type in ServiceStack Request filter

My question is - is it possible and if it is - how, to resolve interface in ServiceStack request filter that uses generic type and the type is retrieved dynamically from DTO of request. The idea is that I have multiple validators defined in my assembly and they use interface that has a generic type. Example:

AddressSaveValidator : BaseValidator<AddressSaveRequest>;

My goal is to on request resolve and see if request has a validator that is defined for such request, then validate and then log the results. The only problem is that I don't know how to resolve interface with generic type. This is example of how would I use it:

        RequestFilters.Add((req, res, dto)  =>
        {
            var validator = container.Resolve<IValidator<typeof(dto)>>();
            var  validatorResult = validator.Validate(dto);
            if(validatorResult.IsValid)
            {
                var logger = container.Resolve<ILogger>();
                var result = logger.LogValidationResults(validationResult);
                throw ValidationException(result);
            }
        });

Of course, it does not work.

Upvotes: 2

Views: 306

Answers (1)

mythz
mythz

Reputation: 143319

You can resolve the IValidator for a request with ValidatorCache.GetValidator() but you can't throw an Exception in GlobalRequestFilters you'll need to write the Error directly to the response, e.g:

var validator = ValidatorCache.GetValidator(req, dto.GetType());
using (validator as IDisposable)
{
    var validatorResult = validator.Validate(dto);
    if (validatorResult.IsValid) return;

    var errorResponse = DtoUtils.CreateErrorResponse(dto, validatorResult.ToErrorResult());

    res.WriteToResponse(req, errorResponse);
}

Upvotes: 2

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