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using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using CQRSTest.Application.Exceptions;
using CQRSTest.Domain;
using MediatR;
namespace CQRSTest.Application.Customers.Queries.GetCustomerDetail
public class GetCustomerDetailQueryHandler : IRequestHandler<GetCustomerDetailQuery, CustomerDetailViewModel>
public async Task<CustomerDetailViewModel> Handle(GetCustomerDetailQuery request, CancellationToken cancellationToken)
// Ở đây chỉ giả lập dữ liệu. Trên thực tế phải tương tác với DB thật
var model = FakeDbContext.Customers.Find(c => c.Id == request.Id);
if(model == null)
throw new NotFoundException(nameof(Customer), request.Id);
var vm = new CustomerDetailViewModel
Name = model.Name,
Address = model.Address
return await Task.FromResult(vm);
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