Type registry example for command processing

Type registry

	class Program
	{
		private static TypeRegistry _registry;

		static void Main(string[] args)
		{
			_registry = new TypeRegistry();
			_registry.RegisterHandlerFor<MyRequest, MyRequestProcessor>();

			SomeActionMethod(new MyRequest {Id = 1000});

		}

		public static void SomeActionMethod(MyRequest request)
		{
			var processor = _registry.ProcessorFor(request);
			processor.Execute();
		}
	}

	public class ProcessMyRequestCommand
	{
	}

	public class MyRequest
	{
		public int Id { get; set; }
	}

	public class MyRequestProcessor: RequestProcessorBase<MyRequest>
	{
		public override void ProcessRequest()
		{
			Console.WriteLine(CommandParameters.Id);
		}
	}

	public abstract class RequestProcessorBase<TTheRequestIProcess>
	{
		public TTheRequestIProcess CommandParameters { get; set; }		
		public abstract void ProcessRequest();

		public void Execute()
		{
			ProcessRequest();
		}
	}

	public class TypeRegistry
	{
		private readonly Dictionary<Type, Type> _registry;

		public TypeRegistry()
		{
			_registry = new Dictionary<Type, Type>();
		}

		public void RegisterHandlerFor<TRequestType, TRequestProcessor>()
		{
			_registry.Add(typeof(TRequestType), typeof(TRequestProcessor));
		}

		public RequestProcessorBase<TRequestType> ProcessorFor<TRequestType>(TRequestType request)
		{
			var processorType = _registry[typeof(TRequestType)];
			var processor = (RequestProcessorBase<TRequestType>)Activator.CreateInstance(processorType);

			processor.CommandParameters = request;
			return processor;
		}
	}