public async Task <TQueryResult> Handle(TQuery request, CancellationToken cancellationToken,
RequestHandlerDelegate <TQueryResult> next)
{
if (request == null)
{
throw new ArgumentNullException($"{typeof(TQuery)} is null");
}
if (_queryValidator != null)
{
var result = await _queryValidator.ValidateAsync(request, cancellationToken);
if (!result.IsValid)
{
throw new Exception(string.Join(", ", result.Errors.Select(x => x.ErrorMessage)));
}
}
return(await next());
}
