public async Task <TResponse> Ask <TResponse>(Domain.Bus.Query.Query query)
{
var handler = GetWrappedHandlers <TResponse>(query);
if (handler == null)
{
throw new QueryNotRegisteredError(query);
}
return(await handler.Handle(query, _provider));
}
private QueryHandlerWrapper <TResponse> GetWrappedHandlers <TResponse>(Domain.Bus.Query.Query query)
{
Type[] typeArgs = { query.GetType(), typeof(TResponse) };
var handlerType = typeof(QueryHandler <,>).MakeGenericType(typeArgs);
var wrapperType = typeof(QueryHandlerWrapper <,>).MakeGenericType(typeArgs);
var handlers =
(IEnumerable)_provider.GetService(typeof(IEnumerable <>).MakeGenericType(handlerType));
var wrappedHandlers = (QueryHandlerWrapper <TResponse>)_queryHandlers.GetOrAdd(query.GetType(),
handlers.Cast <object>()
.Select(handler => (QueryHandlerWrapper <TResponse>)Activator.CreateInstance(wrapperType))
.FirstOrDefault());
return(wrappedHandlers);
}