I am able to register FluentValidation AbstractValidators
using a FluentValidatorFactory
. However, it doesn't feel right, because not all of the IoC container registrations happen during bootstrap / composition root. Instead, the fluent validators are registered by a separate factory:
The composition root:
public class SimpleDependencyInjector : IServiceProvider
{
public readonly Container Container;
public SimpleDependencyInjector()
{
Container = Bootstrap();
}
internal Container Bootstrap()
{
var container = new Container();
container.Register< // ...register all non-fluent-validator types, then
container.Verify();
return container;
}
public object GetService(Type serviceType)
{
return ((IServiceProvider)Container).GetService(serviceType);
}
}
An abstract fluent validator factory depending only on IServiceProvider
public abstract class FluentValidatorFactory : ValidatorFactoryBase
{
private IServiceProvider Injector { get; set; }
protected FluentValidatorFactory(IServiceProvider injector)
{
Injector = injector;
}
public override IValidator CreateInstance(Type validatorType)
{
return Injector.GetService(validatorType) as IValidator;
}
}
A fluent validator factory implementation for SimpleInjector
public class SimpleValidatorFactory : FluentValidatorFactory
{
public SimpleValidatorFactory(SimpleDependencyInjector injector)
: base(injector)
{
var validators = AssemblyScanner.FindValidatorsInAssembly(
Assembly.GetCallingAssembly());
validators.ForEach(validator =>
injector.Container.Register(
validator.InterfaceType, validator.ValidatorType));
injector.Container.Verify();
}
}
SimpleInjector has good support for open generics, and all of my fluent validator classes have signatures similar to the following:
public class SomeClassValidator : AbstractValidator<SomeClass>
{
public SomeClassValidator([depedencies injected here])
{
// ... set up validation rules
}
}
So, is there a better way to register the validators in the bootstrap / composition root, instead of using fluent's validator factory?
P.S. @DotNetJunkie -- would be great if you had a wiki page on this at simpleinjector.codeplex.com.
I think I figured this out myself.
1.) Register fluent's open generic IValidator<T>
interface in the composition root:
public class SimpleDependencyInjector : IServiceProvider
{
public readonly Container Container;
public SimpleDependencyInjector()
{
Container = Bootstrap();
}
internal Container Bootstrap()
{
var container = new Container();
// some container registrations
var assemblies = AppDomain.CurrentDomain.GetAssemblies().ToList();
container.RegisterManyForOpenGeneric(typeof(IValidator<>), assemblies);
// some more registrations
container.Verify();
return container;
}
public object GetService(Type serviceType)
{
return ((IServiceProvider)Container).GetService(serviceType);
}
}
2.) Get rid of the SimpleValidatorFactory
class.
3.) Make the FluentValidatorFactory
a non-abstract, concrete class:
public class FluentValidatorFactory : ValidatorFactoryBase
{
private IServiceProvider Injector { get; set; }
public FluentValidatorFactory(IServiceProvider injector)
{
Injector = injector;
}
public override IValidator CreateInstance(Type validatorType)
{
return Injector.GetService(validatorType) as IValidator;
}
}
4.) Register the FluentValidatorFactory as the validation factory provider in global.asax:
var injector = new SimpleDependencyInjector();
FluentValidationModelValidatorProvider.Configure(
provider =>
{
provider.ValidatorFactory = new FluentValidatorFactory(injector);
}
);