Added domain events in Ordering Api

eShopOnContainers-ServicesAndWebApps.sln

@@ -41,6 +41,12 @@ EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FunctionalTests", "test\Services\FunctionalTests\FunctionalTests.csproj", "{621E7211-58D0-45FD-9600-1CB490BD930E}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UnitTest", "test\Services\UnitTest\UnitTest.csproj", "{7796F5D8-31FC-45A4-B673-19DE5BA194CF}"
+	ProjectSection(ProjectDependencies) = postProject
+		{A579E108-5445-403D-A407-339AC4D1611B} = {A579E108-5445-403D-A407-339AC4D1611B}
+		{621E7211-58D0-45FD-9600-1CB490BD930E} = {621E7211-58D0-45FD-9600-1CB490BD930E}
+		{FEA0C318-FFED-4D39-8781-265718CA43DD} = {FEA0C318-FFED-4D39-8781-265718CA43DD}
+		{F16E3C6A-1C94-4EAB-BE91-099618060B68} = {F16E3C6A-1C94-4EAB-BE91-099618060B68}
+	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Identity.API", "src\Services\Identity\Identity.API\Identity.API.csproj", "{A579E108-5445-403D-A407-339AC4D1611B}"
 EndProject

src/Services/Ordering/Ordering.API/Application/Commands/CreateOrderCommand.cs

@@ -2,6 +2,7 @@
 using MediatR;
 using System.Collections.Generic;
 using System.Runtime.Serialization;
+using System.Collections;
 
 namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
 {
@@ -51,6 +52,12 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
         [DataMember]
         public int CardTypeId { get; private set; }
 
+        [DataMember]
+        public int PaymentId { get; private set; }
+
+        [DataMember]
+        public int BuyerId { get; private set; }
+
         [DataMember]
         public IEnumerable<OrderItemDTO> OrderItems => _orderItems;
 
@@ -66,7 +73,7 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
 
         public CreateOrderCommand(string city, string street, string state, string country, string zipcode,
             string cardNumber, string cardHolderName, DateTime cardExpiration,
-            string cardSecurityNumber, int cardTypeId) : this()
+            string cardSecurityNumber, int cardTypeId, int paymentId, int buyerId) : this()
         {
             City = city;
             Street = street;
@@ -75,12 +82,14 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
             ZipCode = zipcode;
             CardNumber = cardNumber;
             CardHolderName = cardHolderName;
+            CardExpiration = cardExpiration;
             CardSecurityNumber = cardSecurityNumber;
             CardTypeId = cardTypeId;
             CardExpiration = cardExpiration;
+            PaymentId = paymentId;
+            BuyerId = buyerId;
         }
 
-
         public class OrderItemDTO
         {
             public int ProductId { get; set; }

src/Services/Ordering/Ordering.API/Application/Commands/CreateOrderCommandHandler.cs

@@ -1,6 +1,5 @@
 namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
 {
-    using Domain.AggregatesModel.BuyerAggregate;
     using Domain.AggregatesModel.OrderAggregate;
     using MediatR;
     using Microsoft.eShopOnContainers.Services.Ordering.API.Infrastructure.Services;
@@ -24,16 +23,16 @@
     public class CreateOrderCommandHandler
         : IAsyncRequestHandler<CreateOrderCommand, bool>
     {
-        private readonly IBuyerRepository<Buyer> _buyerRepository;
         private readonly IOrderRepository<Order> _orderRepository;
         private readonly IIdentityService _identityService;
+        private readonly IMediator _mediator;
 
         // Using DI to inject infrastructure persistence Repositories
-        public CreateOrderCommandHandler(IBuyerRepository<Buyer> buyerRepository, IOrderRepository<Order> orderRepository, IIdentityService identityService)
+        public CreateOrderCommandHandler(IMediator mediator, IOrderRepository<Order> orderRepository, IIdentityService identityService)
         {
-            _buyerRepository = buyerRepository ?? throw new ArgumentNullException(nameof(buyerRepository));
             _orderRepository = orderRepository ?? throw new ArgumentNullException(nameof(orderRepository));
             _identityService = identityService ?? throw new ArgumentNullException(nameof(identityService));
+            _mediator = mediator ?? throw new ArgumentNullException(nameof(mediator));
         }
 
         public async Task<bool> Handle(CreateOrderCommand message)
@@ -42,35 +41,8 @@
             // DDD patterns comment: Add child entities and value-objects through the Order Aggregate-Root
             // methods and constructor so validations, invariants and business logic 
             // make sure that consistency is preserved across the whole aggregate
-
-            var cardTypeId = message.CardTypeId != 0 ? message.CardTypeId : 1;
-
-            var buyerGuid = _identityService.GetUserIdentity();
-            var buyer = await _buyerRepository.FindAsync(buyerGuid);
-
-            if (buyer == null)
-            {
-                buyer = new Buyer(buyerGuid);
-            }
-
-            var payment = buyer.AddPaymentMethod(cardTypeId,
-                $"Payment Method on {DateTime.UtcNow}",
-                message.CardNumber,
-                message.CardSecurityNumber,
-                message.CardHolderName,
-                message.CardExpiration);
-
-            _buyerRepository.Add(buyer);
-
-            await _buyerRepository.UnitOfWork
-                .SaveChangesAsync();
-
-            // Create the Order AggregateRoot
-            // DDD patterns comment: Add child entities and value-objects through the Order Aggregate-Root
-            // methods and constructor so validations, invariants and business logic 
-            // make sure that consistency is preserved across the whole aggregate
-
-            var order = new Order(buyer.Id, payment.Id, new Address(message.Street, message.City, message.State, message.Country, message.ZipCode));
+            var address = new Address(message.Street, message.City, message.State, message.Country, message.ZipCode);
+            var order = new Order(address , message.CardTypeId, message.CardNumber, message.CardSecurityNumber, message.CardHolderName, message.CardExpiration);
 
             foreach (var item in message.OrderItems)
             {
@@ -80,7 +52,7 @@
              _orderRepository.Add(order);
 
             var result = await _orderRepository.UnitOfWork
-                .SaveChangesAsync();
+                .SaveEntitiesAsync();
 
             return result > 0;
 

src/Services/Ordering/Ordering.API/Application/EventHandlers/OrderCreatedEventHandler.cs

@@ -0,0 +1,53 @@
+using MediatR;
+using Microsoft.eShopOnContainers.Services.Ordering.API.Infrastructure.Services;
+using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate;
+using Microsoft.Extensions.Logging;
+using Ordering.Domain.Events;
+using System;
+using System.Threading.Tasks;
+
+namespace Ordering.API.Application.EventHandlers
+{
+    public class OrderCreatedEventHandler : IAsyncNotificationHandler<OrderCreated>
+    {
+        private readonly ILoggerFactory _logger;
+        private readonly IBuyerRepository<Buyer> _buyerRepository;
+        private readonly IIdentityService _identityService;
+
+        public OrderCreatedEventHandler(ILoggerFactory logger, IBuyerRepository<Buyer> buyerRepository, IIdentityService identityService)
+        {
+            _buyerRepository = buyerRepository ?? throw new ArgumentNullException(nameof(buyerRepository));
+            _identityService = identityService ?? throw new ArgumentNullException(nameof(identityService));
+            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+        }
+
+        public async Task Handle(OrderCreated orderNotification)
+        {
+            var cardTypeId = orderNotification.CardTypeId != 0 ? orderNotification.CardTypeId : 1;
+
+            var buyerGuid = _identityService.GetUserIdentity();
+            var buyer = await _buyerRepository.FindAsync(buyerGuid);
+
+            if (buyer == null)
+            {
+                buyer = new Buyer(buyerGuid);
+            }
+
+            var payment = buyer.AddPaymentMethod(cardTypeId,
+                $"Payment Method on {DateTime.UtcNow}",
+                orderNotification.CardNumber,
+                orderNotification.CardSecurityNumber,
+                orderNotification.CardHolderName,
+                orderNotification.CardExpiration,
+                orderNotification.Order.Id);
+
+            _buyerRepository.Add(buyer);
+
+            await _buyerRepository.UnitOfWork
+                .SaveEntitiesAsync();
+
+            _logger.CreateLogger(nameof(OrderCreatedEventHandler)).LogTrace($"A new payment method has been successfully added for orderId: {orderNotification.Order.Id}.");
+
+        }
+    }
+}

src/Services/Ordering/Ordering.API/Application/EventHandlers/PaymentMethodCheckedEventHandler.cs

@@ -0,0 +1,33 @@
+using MediatR;
+using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate;
+using Microsoft.Extensions.Logging;
+using Ordering.Domain.Events;
+using System;
+using System.Threading.Tasks;
+
+namespace Ordering.API.Application.EventHandlers
+{
+    public class PaymentMethodCheckedEventHandler : IAsyncNotificationHandler<PaymentMethodChecked>
+    {
+        private readonly IOrderRepository<Order> _orderRepository;
+        private readonly ILoggerFactory _logger;
+        public PaymentMethodCheckedEventHandler(IOrderRepository<Order> orderRepository, ILoggerFactory logger)
+        {
+            _orderRepository = orderRepository ?? throw new ArgumentNullException(nameof(orderRepository));
+            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+        }
+
+        public async Task Handle(PaymentMethodChecked paymentMethodNotification)
+        {
+            var orderToUpdate = await _orderRepository.GetAsync(paymentMethodNotification.OrderId);
+            orderToUpdate.SetBuyerId(paymentMethodNotification.Buyer.Id);
+            orderToUpdate.SetPaymentId(paymentMethodNotification.Payment.Id);
+            
+            await _orderRepository.UnitOfWork
+                .SaveEntitiesAsync();
+                                       
+            _logger.CreateLogger(nameof(PaymentMethodCheckedEventHandler))
+                .LogTrace($"Order with Id: {paymentMethodNotification.OrderId} has been successfully updated with a new payment method id: { paymentMethodNotification.Payment.Id }");
+        }
+    }
+}

src/Services/Ordering/Ordering.API/Controllers/OrdersController.cs

@@ -1,5 +1,4 @@
 using MediatR;
-using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands;
 using Microsoft.eShopOnContainers.Services.Ordering.API.Application.Queries;
@@ -28,19 +27,19 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.API.Controllers
 
         [Route("new")]
         [HttpPost]
-        public async Task<IActionResult> CreateOrder([FromBody]CreateOrderCommand createOrderCommand, [FromHeader(Name = "x-requestid")] string requestId)
+        public async Task<IActionResult> CreateOrder([FromBody]CreateOrderCommand command, [FromHeader(Name = "x-requestid")] string requestId)
         {
             bool result = false;
             if (Guid.TryParse(requestId, out Guid guid) && guid != Guid.Empty)
             {
-                var requestCreateOrder = new IdentifiedCommand<CreateOrderCommand, bool>(createOrderCommand, guid);
+                var requestCreateOrder = new IdentifiedCommand<CreateOrderCommand, bool>(command, guid);
                 result = await _mediator.SendAsync(requestCreateOrder);
             }
             else
             {
                 // If no x-requestid header is found we process the order anyway. This is just temporary to not break existing clients
                 // that aren't still updated. When all clients were updated this could be removed.
-                result = await _mediator.SendAsync(createOrderCommand);
+                result = await _mediator.SendAsync(command);
             }
 
             if (result)

src/Services/Ordering/Ordering.API/Infrastructure/AutofacModules/MediatorModule.cs

@@ -3,6 +3,8 @@ using Autofac.Core;
 using MediatR;
 using Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands;
 using Microsoft.eShopOnContainers.Services.Ordering.API.Application.Decorators;
+using Ordering.API.Application.EventHandlers;
+using Ordering.Domain.Events;
 using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
@@ -21,6 +23,11 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.API.Infrastructure.Autof
                     .Where(i => i.IsClosedTypeOf(typeof(IAsyncRequestHandler<,>)))
                     .Select(i => new KeyedService("IAsyncRequestHandler", i)));
             
+            builder
+                .RegisterAssemblyTypes(typeof(OrderCreatedEventHandler).GetTypeInfo().Assembly)
+                .Where(t => t.IsClosedTypeOf(typeof(IAsyncNotificationHandler<>)))
+                .AsImplementedInterfaces();           
+
             builder.Register<SingleInstanceFactory>(context =>
             {
                 var componentContext = context.Resolve<IComponentContext>();

src/Services/Ordering/Ordering.API/Infrastructure/Migrations/20170313100034_Domain_events.Designer.cs

@@ -0,0 +1,244 @@
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.eShopOnContainers.Services.Ordering.Infrastructure;
+
+namespace Ordering.API.Migrations
+{
+    [DbContext(typeof(OrderingContext))]
+    [Migration("20170313100034_Domain_events")]
+    partial class Domain_events
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+            modelBuilder
+                .HasAnnotation("ProductVersion", "1.1.0-rtm-22752")
+                .HasAnnotation("SqlServer:Sequence:.orderitemseq", "'orderitemseq', '', '1', '10', '', '', 'Int64', 'False'")
+                .HasAnnotation("SqlServer:Sequence:ordering.buyerseq", "'buyerseq', 'ordering', '1', '10', '', '', 'Int64', 'False'")
+                .HasAnnotation("SqlServer:Sequence:ordering.orderseq", "'orderseq', 'ordering', '1', '10', '', '', 'Int64', 'False'")
+                .HasAnnotation("SqlServer:Sequence:ordering.paymentseq", "'paymentseq', 'ordering', '1', '10', '', '', 'Int64', 'False'")
+                .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn);
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate.Buyer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasAnnotation("SqlServer:HiLoSequenceName", "buyerseq")
+                        .HasAnnotation("SqlServer:HiLoSequenceSchema", "ordering")
+                        .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.SequenceHiLo);
+
+                    b.Property<string>("IdentityGuid")
+                        .IsRequired()
+                        .HasMaxLength(200);
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("IdentityGuid")
+                        .IsUnique();
+
+                    b.ToTable("buyers","ordering");
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate.CardType", b =>
+                {
+                    b.Property<int>("Id")
+                        .HasDefaultValue(1);
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200);
+
+                    b.HasKey("Id");
+
+                    b.ToTable("cardtypes","ordering");
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate.PaymentMethod", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasAnnotation("SqlServer:HiLoSequenceName", "paymentseq")
+                        .HasAnnotation("SqlServer:HiLoSequenceSchema", "ordering")
+                        .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.SequenceHiLo);
+
+                    b.Property<string>("Alias")
+                        .IsRequired()
+                        .HasMaxLength(200);
+
+                    b.Property<int>("BuyerId");
+
+                    b.Property<string>("CardHolderName")
+                        .IsRequired()
+                        .HasMaxLength(200);
+
+                    b.Property<string>("CardNumber")
+                        .IsRequired()
+                        .HasMaxLength(25);
+
+                    b.Property<int>("CardTypeId");
+
+                    b.Property<DateTime>("Expiration");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BuyerId");
+
+                    b.HasIndex("CardTypeId");
+
+                    b.ToTable("paymentmethods","ordering");
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.Address", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<string>("City");
+
+                    b.Property<string>("Country");
+
+                    b.Property<string>("State");
+
+                    b.Property<string>("Street");
+
+                    b.Property<string>("ZipCode");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("address","ordering");
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.Order", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasAnnotation("SqlServer:HiLoSequenceName", "orderseq")
+                        .HasAnnotation("SqlServer:HiLoSequenceSchema", "ordering")
+                        .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.SequenceHiLo);
+
+                    b.Property<int?>("AddressId");
+
+                    b.Property<int?>("BuyerId");
+
+                    b.Property<DateTime>("OrderDate");
+
+                    b.Property<int>("OrderStatusId");
+
+                    b.Property<int?>("PaymentMethodId");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AddressId");
+
+                    b.HasIndex("BuyerId");
+
+                    b.HasIndex("OrderStatusId");
+
+                    b.HasIndex("PaymentMethodId");
+
+                    b.ToTable("orders","ordering");
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.OrderItem", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasAnnotation("SqlServer:HiLoSequenceName", "orderitemseq")
+                        .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.SequenceHiLo);
+
+                    b.Property<decimal>("Discount");
+
+                    b.Property<int>("OrderId");
+
+                    b.Property<string>("PictureUrl");
+
+                    b.Property<int>("ProductId");
+
+                    b.Property<string>("ProductName")
+                        .IsRequired();
+
+                    b.Property<decimal>("UnitPrice");
+
+                    b.Property<int>("Units");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("OrderId");
+
+                    b.ToTable("orderItems","ordering");
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.OrderStatus", b =>
+                {
+                    b.Property<int>("Id")
+                        .HasDefaultValue(1);
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200);
+
+                    b.HasKey("Id");
+
+                    b.ToTable("orderstatus","ordering");
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Infrastructure.ClientRequest", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<string>("Name")
+                        .IsRequired();
+
+                    b.Property<DateTime>("Time");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("requests","ordering");
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate.PaymentMethod", b =>
+                {
+                    b.HasOne("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate.Buyer")
+                        .WithMany("PaymentMethods")
+                        .HasForeignKey("BuyerId")
+                        .OnDelete(DeleteBehavior.Cascade);
+
+                    b.HasOne("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate.CardType", "CardType")
+                        .WithMany()
+                        .HasForeignKey("CardTypeId")
+                        .OnDelete(DeleteBehavior.Cascade);
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.Order", b =>
+                {
+                    b.HasOne("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.Address", "Address")
+                        .WithMany()
+                        .HasForeignKey("AddressId");
+
+                    b.HasOne("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate.Buyer", "Buyer")
+                        .WithMany()
+                        .HasForeignKey("BuyerId");
+
+                    b.HasOne("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.OrderStatus", "OrderStatus")
+                        .WithMany()
+                        .HasForeignKey("OrderStatusId")
+                        .OnDelete(DeleteBehavior.Cascade);
+
+                    b.HasOne("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate.PaymentMethod", "PaymentMethod")
+                        .WithMany()
+                        .HasForeignKey("PaymentMethodId");
+                });
+
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.OrderItem", b =>
+                {
+                    b.HasOne("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.Order")
+                        .WithMany("OrderItems")
+                        .HasForeignKey("OrderId")
+                        .OnDelete(DeleteBehavior.Cascade);
+                });
+        }
+    }
+}

src/Services/Ordering/Ordering.API/Infrastructure/Migrations/20170313100034_Domain_events.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace Ordering.API.Migrations
+{
+    public partial class Domain_events : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_orders_buyers_BuyerId",
+                schema: "ordering",
+                table: "orders");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "PaymentMethodId",
+                schema: "ordering",
+                table: "orders",
+                nullable: true,
+                oldClrType: typeof(int));
+
+            migrationBuilder.AlterColumn<int>(
+                name: "BuyerId",
+                schema: "ordering",
+                table: "orders",
+                nullable: true,
+                oldClrType: typeof(int));
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_orders_buyers_BuyerId",
+                schema: "ordering",
+                table: "orders",
+                column: "BuyerId",
+                principalSchema: "ordering",
+                principalTable: "buyers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_orders_buyers_BuyerId",
+                schema: "ordering",
+                table: "orders");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "PaymentMethodId",
+                schema: "ordering",
+                table: "orders",
+                nullable: false,
+                oldClrType: typeof(int),
+                oldNullable: true);
+
+            migrationBuilder.AlterColumn<int>(
+                name: "BuyerId",
+                schema: "ordering",
+                table: "orders",
+                nullable: false,
+                oldClrType: typeof(int),
+                oldNullable: true);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_orders_buyers_BuyerId",
+                schema: "ordering",
+                table: "orders",
+                column: "BuyerId",
+                principalSchema: "ordering",
+                principalTable: "buyers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+    }
+}

src/Services/Ordering/Ordering.API/Infrastructure/Migrations/OrderingContextModelSnapshot.cs

@@ -119,13 +119,13 @@ namespace Ordering.API.Migrations
 
                     b.Property<int?>("AddressId");
 
-                    b.Property<int>("BuyerId");
+                    b.Property<int?>("BuyerId");
 
                     b.Property<DateTime>("OrderDate");
 
                     b.Property<int>("OrderStatusId");
 
-                    b.Property<int>("PaymentMethodId");
+                    b.Property<int?>("PaymentMethodId");
 
                     b.HasKey("Id");
 
@@ -183,7 +183,7 @@ namespace Ordering.API.Migrations
                     b.ToTable("orderstatus","ordering");
                 });
 
-            modelBuilder.Entity("Ordering.Infrastructure.ClientRequest", b =>
+            modelBuilder.Entity("Microsoft.eShopOnContainers.Services.Ordering.Infrastructure.ClientRequest", b =>
                 {
                     b.Property<Guid>("Id")
                         .ValueGeneratedOnAdd();
@@ -219,8 +219,7 @@ namespace Ordering.API.Migrations
 
                     b.HasOne("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate.Buyer", "Buyer")
                         .WithMany()
-                        .HasForeignKey("BuyerId")
-                        .OnDelete(DeleteBehavior.Cascade);
+                        .HasForeignKey("BuyerId");
 
                     b.HasOne("Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate.OrderStatus", "OrderStatus")
                         .WithMany()

src/Services/Ordering/Ordering.Domain/AggregatesModel/BuyerAggregate/Buyer.cs

@@ -1,6 +1,6 @@
 using Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork;
+using Ordering.Domain.Events;
 using System;
-using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 
@@ -22,16 +22,18 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.B
         public Buyer(string identity) : this()
         {
             IdentityGuid = !string.IsNullOrWhiteSpace(identity) ? identity : throw new ArgumentNullException(nameof(identity));
-
         }
 
-        public PaymentMethod AddPaymentMethod(int cardTypeId, string alias, string cardNumber, string securityNumber, string cardHolderName, DateTime expiration)
+        public PaymentMethod AddPaymentMethod(
+            int cardTypeId, string alias, string cardNumber, 
+            string securityNumber, string cardHolderName, DateTime expiration, int orderId)
         {
             var existingPayment = _paymentMethods.Where(p => p.IsEqualTo(cardTypeId, cardNumber, expiration))
                 .SingleOrDefault();
 
             if (existingPayment != null)
             {
+                AddEvent(new PaymentMethodChecked(this, existingPayment, orderId));
                 return existingPayment;
             }
             else
@@ -39,7 +41,7 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.B
                 var payment = new PaymentMethod(cardTypeId, alias, cardNumber, securityNumber, cardHolderName, expiration);
 
                 _paymentMethods.Add(payment);
-
+                AddEvent(new PaymentMethodChecked(this, payment, orderId));
                 return payment;
             }
         }       

src/Services/Ordering/Ordering.Domain/AggregatesModel/OrderAggregate/IOrderRepository.cs

@@ -1,4 +1,5 @@
 using Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork;
+using System.Threading.Tasks;
 
 namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate
 {
@@ -8,5 +9,9 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
     public interface IOrderRepository<T> : IRepository<T> where T : IAggregateRoot
     {
         Order Add(Order order);
+
+        Task<Order> GetAsync(int orderId);
+
+        void Update(Order order);
     }
 }

src/Services/Ordering/Ordering.Domain/AggregatesModel/OrderAggregate/Order.cs

@@ -1,5 +1,7 @@
-using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate;
+using MediatR;
+using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate;
 using Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork;
+using Ordering.Domain.Events;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -17,7 +19,7 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
         public Address Address { get; private set; }
 
         public Buyer Buyer { get; private set; }
-        private int _buyerId;
+        private int? _buyerId;
 
         public OrderStatus OrderStatus { get; private set; }
         private int _orderStatusId;
@@ -36,11 +38,12 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
         //https://msdn.microsoft.com/en-us/library/e78dcd75(v=vs.110).aspx 
 
         public PaymentMethod PaymentMethod { get; private set; }
-        private int _paymentMethodId;
+        private int? _paymentMethodId;
 
         protected Order() { }
 
-        public Order(int buyerId, int paymentMethodId, Address address)
+        public Order(Address address, int cardTypeId, string cardNumber, string cardSecurityNumber,
+                string cardHolderName, DateTime cardExpiration, int? buyerId = null, int? paymentMethodId = null)
         {
             _orderItems = new List<OrderItem>();
             _buyerId = buyerId;
@@ -48,6 +51,8 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
             _orderStatusId = OrderStatus.InProcess.Id;
             _orderDate = DateTime.UtcNow;
             Address = address;
+            AddCreatedOrderEvent(cardTypeId, cardNumber,
+                cardSecurityNumber, cardHolderName, cardExpiration);
         }
 
         // DDD Patterns comment
@@ -74,9 +79,28 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
                 //add validated new order item
 
                 var orderItem = new OrderItem(productId, productName, unitPrice, discount, pictureUrl, units);
-
                 _orderItems.Add(orderItem);
             }
         }
+
+        public void SetPaymentId(int id)
+        {
+            _paymentMethodId = id;
+        }
+
+        public void SetBuyerId(int id)
+        {
+            _buyerId = id;
+        }
+
+        private void AddCreatedOrderEvent(int cardTypeId, string cardNumber,
+                string cardSecurityNumber, string cardHolderName, DateTime cardExpiration)
+        {
+            var @orderCreatedEvent = new OrderCreated(
+                this, cardTypeId, cardNumber, cardSecurityNumber,
+                cardHolderName, cardExpiration);
+
+            AddEvent(@orderCreatedEvent);
+        }
     }
 }

src/Services/Ordering/Ordering.Domain/Events/OrderCreated.cs

@@ -0,0 +1,35 @@
+using MediatR;
+using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Ordering.Domain.Events
+{
+    /// <summary>
+    /// Event used when an order is created
+    /// </summary>
+    public class OrderCreated
+        : IAsyncNotification
+    {
+        public int CardTypeId { get; private set; }
+        public string CardNumber { get; private set; }
+        public string CardSecurityNumber { get; private set; }
+        public string CardHolderName { get; private set; }
+        public DateTime CardExpiration { get; private set; }
+        public Order Order { get; private set; }
+
+        public OrderCreated(Order order,
+            int cardTypeId, string cardNumber, 
+            string cardSecurityNumber, string cardHolderName, 
+            DateTime cardExpiration)
+        {
+            Order = order;
+            CardTypeId = cardTypeId;
+            CardNumber = cardNumber;
+            CardSecurityNumber = cardSecurityNumber;
+            CardHolderName = cardHolderName;
+            CardExpiration = cardExpiration;
+        }
+    }
+}

src/Services/Ordering/Ordering.Domain/Events/PaymentMethodChecked.cs

@@ -0,0 +1,23 @@
+using MediatR;
+using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Ordering.Domain.Events
+{
+    public class PaymentMethodChecked
+        : IAsyncNotification
+    {
+        public Buyer Buyer { get; private set; }
+        public PaymentMethod Payment { get; private set; }
+        public int OrderId { get; private set; }
+
+        public PaymentMethodChecked(Buyer buyer, PaymentMethod payment, int orderId)
+        {
+            Buyer = buyer;
+            Payment = payment;
+            OrderId = orderId;
+        }
+    }
+}

src/Services/Ordering/Ordering.Domain/Ordering.Domain.csproj

@@ -11,4 +11,9 @@
     <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="MediatR" Version="2.1.0" />
+    <PackageReference Include="MediatR.Extensions.Microsoft.DependencyInjection" Version="1.1.0" />
+  </ItemGroup>
+
 </Project>

src/Services/Ordering/Ordering.Domain/SeedWork/Entity.cs

@@ -1,7 +1,8 @@
 namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork
 {
     using System;
-
+    using MediatR;
+    using System.Collections.Generic;
 
     public abstract class Entity
     {
@@ -9,6 +10,8 @@
         int? _requestedHashCode;
         int _Id;
 
+        private List<IAsyncNotification> _events;
+
         public virtual  int Id 
         {
             get
@@ -21,6 +24,19 @@
             }
         }
 
+        public List<IAsyncNotification> Events => _events;        
+        public void AddEvent(IAsyncNotification eventItem)
+        {
+            _events = _events ?? new List<IAsyncNotification>();
+            _events.Add(eventItem);
+        }
+
+        public void RemoveEvent(IAsyncNotification eventItem)
+        {
+            if (_events is null) return;
+            _events.Remove(eventItem);
+        }
+
         public bool IsTransient()
         {
             return this.Id == default(Int32);

src/Services/Ordering/Ordering.Domain/SeedWork/IUnitOfWork.cs

@@ -7,5 +7,6 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork
     public interface IUnitOfWork : IDisposable
     {        
         Task<int> SaveChangesAsync(CancellationToken cancellationToken = default(CancellationToken));
+        Task<int> SaveEntitiesAsync(CancellationToken cancellationToken = default(CancellationToken));
     }
 }

src/Services/Ordering/Ordering.Infrastructure/MediatorExtension.cs

@@ -0,0 +1,25 @@
+using MediatR;
+using Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork;
+using Microsoft.eShopOnContainers.Services.Ordering.Infrastructure;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Ordering.Infrastructure
+{
+    public static class MediatorExtension
+    {
+        public static async Task RaiseDomainEventsAsync(this IMediator mediator, OrderingContext ctx)
+        {
+            var domainEntities = ctx.ChangeTracker.Entries<Entity>().Where(x => x.Entity.Events != null && x.Entity.Events.Any());
+            var domainEvents = domainEntities.SelectMany(x => x.Entity.Events).ToList();
+            domainEntities.ToList().ForEach(entity => entity.Entity.Events.Clear());
+
+            var tasks = domainEvents
+                .Select(async (domainEvent) => {
+                    await mediator.PublishAsync(domainEvent);
+                });
+
+            await Task.WhenAll(tasks);
+        }
+    }
+}

src/Services/Ordering/Ordering.Infrastructure/OrderingContext.cs

@@ -1,10 +1,14 @@
-using Microsoft.EntityFrameworkCore;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Metadata;
 using Microsoft.EntityFrameworkCore.Metadata.Builders;
 using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.BuyerAggregate;
 using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate;
 using Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork;
+using Ordering.Infrastructure;
 using System;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure
 {
@@ -26,7 +30,12 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure
 
         public DbSet<OrderStatus> OrderStatus { get; set; }
 
-        public OrderingContext(DbContextOptions options) : base(options) { }
+        private readonly IMediator _mediator;
+
+        public OrderingContext(DbContextOptions options, IMediator mediator) : base(options)
+        {
+            _mediator = mediator;
+        }
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)
         {
@@ -65,6 +74,8 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure
 
             buyerConfiguration.HasKey(b => b.Id);
 
+            buyerConfiguration.Ignore(b => b.Events);
+
             buyerConfiguration.Property(b => b.Id)
                 .ForSqlServerUseSequenceHiLo("buyerseq", DEFAULT_SCHEMA);
 
@@ -91,6 +102,8 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure
 
             paymentConfiguration.HasKey(b => b.Id);
 
+            paymentConfiguration.Ignore(b => b.Events);
+
             paymentConfiguration.Property(b => b.Id)
                 .ForSqlServerUseSequenceHiLo("paymentseq", DEFAULT_SCHEMA);
 
@@ -126,13 +139,15 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure
 
             orderConfiguration.HasKey(o => o.Id);
 
+            orderConfiguration.Ignore(b => b.Events);
+
             orderConfiguration.Property(o => o.Id)
                 .ForSqlServerUseSequenceHiLo("orderseq", DEFAULT_SCHEMA);
 
             orderConfiguration.Property<DateTime>("OrderDate").IsRequired();
-            orderConfiguration.Property<int>("BuyerId").IsRequired();
+            orderConfiguration.Property<int?>("BuyerId").IsRequired(false);
             orderConfiguration.Property<int>("OrderStatusId").IsRequired();
-            orderConfiguration.Property<int>("PaymentMethodId").IsRequired();
+            orderConfiguration.Property<int?>("PaymentMethodId").IsRequired(false);
 
             var navigation = orderConfiguration.Metadata.FindNavigation(nameof(Order.OrderItems));
             // DDD Patterns comment:
@@ -142,10 +157,12 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure
             orderConfiguration.HasOne(o => o.PaymentMethod)
                 .WithMany()
                 .HasForeignKey("PaymentMethodId")
+                .IsRequired(false)
                 .OnDelete(DeleteBehavior.Restrict);
 
             orderConfiguration.HasOne(o => o.Buyer)
                 .WithMany()
+                .IsRequired(false)
                 .HasForeignKey("BuyerId");
 
             orderConfiguration.HasOne(o => o.OrderStatus)
@@ -159,6 +176,8 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure
 
             orderItemConfiguration.HasKey(o => o.Id);
 
+            orderItemConfiguration.Ignore(b => b.Events);
+
             orderItemConfiguration.Property(o => o.Id)
                 .ForSqlServerUseSequenceHiLo("orderitemseq");
 
@@ -215,5 +234,12 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure
                 .HasMaxLength(200)
                 .IsRequired();
         }
+
+        public async Task<int> SaveEntitiesAsync(CancellationToken cancellationToken = default(CancellationToken))
+        {
+            var result = await base.SaveChangesAsync();
+            await _mediator.RaiseDomainEventsAsync(this);
+            return result;
+        }        
     }
 }

src/Services/Ordering/Ordering.Infrastructure/Repositories/OrderRepository.cs

@@ -1,6 +1,8 @@
-using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate;
 using Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork;
 using System;
+using System.Threading.Tasks;
 
 namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure.Repositories
 {
@@ -24,8 +26,18 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Infrastructure.Repositor
 
         public Order Add(Order order)
         {
-            return _context.Orders.Add(order)
-                .Entity;
+            return  _context.Orders.Add(order).Entity;
+               
+        }
+
+        public async Task<Order> GetAsync(int orderId)
+        {
+            return await _context.Orders.FindAsync(orderId);
+        }
+
+        public void Update(Order order)
+        {
+            _context.Entry(order).State = EntityState.Modified;
         }
     }
 }

test/Services/FunctionalTests/Services/Ordering/OrderingScenarios.cs

@@ -75,7 +75,9 @@
                 country: "USA",
                 state: "WA",
                 street: "One way",
-                zipcode: "zipcode"
+                zipcode: "zipcode",
+                paymentId: 1,
+                buyerId: 3
             );
 
             order.AddOrderItem(new OrderItemDTO()
@@ -101,7 +103,9 @@
                 country: "USA",
                 state: "WA",
                 street: "One way",
-                zipcode: "zipcode"
+                zipcode: "zipcode",
+                paymentId: 1,
+                buyerId: 3
             );
 
             return JsonConvert.SerializeObject(order);

test/Services/UnitTest/Ordering/Application/IdentifierCommandHandlerTest.cs

@@ -79,7 +79,9 @@ namespace UnitTest.Ordering.Application
                 cardExpiration: args != null && args.ContainsKey("cardExpiration") ? (DateTime)args["cardExpiration"] : DateTime.MinValue,
                 cardSecurityNumber: args != null && args.ContainsKey("cardSecurityNumber") ? (string)args["cardSecurityNumber"] : "123",
                 cardHolderName: args != null && args.ContainsKey("cardHolderName") ? (string)args["cardHolderName"] : "XXX",
-                cardTypeId: args != null && args.ContainsKey("cardTypeId") ? (int)args["cardTypeId"] : 0);
+                cardTypeId: args != null && args.ContainsKey("cardTypeId") ? (int)args["cardTypeId"] : 0,
+                paymentId: args != null && args.ContainsKey("paymentId") ? (int)args["paymentId"] : 0,
+                buyerId: args != null && args.ContainsKey("buyerId") ? (int)args["buyerId"] : 0);
         }
     }
 }

test/Services/UnitTest/Ordering/Application/NewOrderCommandHandlerTest.cs

@@ -10,21 +10,22 @@ using System.Threading.Tasks;
 
 namespace UnitTest.Ordering.Application
 {
+    using MediatR;
     using System.Collections;
     using System.Collections.Generic;
     using Xunit;
     public class NewOrderRequestHandlerTest
     {
-        private readonly Mock<IBuyerRepository<Buyer>> _buyerRepositoryMock;
         private readonly Mock<IOrderRepository<Order>> _orderRepositoryMock;
         private readonly Mock<IIdentityService> _identityServiceMock;
+        private readonly Mock<IMediator> _mediator;
 
         public NewOrderRequestHandlerTest()
         {
 
-            _buyerRepositoryMock = new Mock<IBuyerRepository<Buyer>>();
             _orderRepositoryMock = new Mock<IOrderRepository<Order>>();
             _identityServiceMock = new Mock<IIdentityService>();
+            _mediator = new Mock<IMediator>();
         }
 
         [Fact]
@@ -37,21 +38,15 @@ namespace UnitTest.Ordering.Application
             { ["cardExpiration"] = DateTime.Now.AddYears(1) });
 
             // Arrange
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.FindAsync(buyerId))
-               .Returns(Task.FromResult<Buyer>(FakeBuyer()));
+            _orderRepositoryMock.Setup(orderRepo => orderRepo.GetAsync(It.IsAny<int>()))
+               .Returns(Task.FromResult<Order>(FakeOrder()));
 
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
-                .Returns(Task.FromResult(1));
-
-            _orderRepositoryMock.Setup(or => or.Add(FakeOrder()))
-                .Returns(FakeOrder());
-
-            _orderRepositoryMock.Setup(or => or.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
+            _orderRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
                 .Returns(Task.FromResult(1));
 
             _identityServiceMock.Setup(svc => svc.GetUserIdentity()).Returns(buyerId);
             //Act
-            var handler = new CreateOrderCommandHandler(_buyerRepositoryMock.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
+            var handler = new CreateOrderCommandHandler(_mediator.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
             var result = await handler.Handle(fakeOrderCmd);
 
             //Assert
@@ -66,19 +61,16 @@ namespace UnitTest.Ordering.Application
             var fakeOrderCmd = FakeOrderRequestWithBuyer(new Dictionary<string, object>
             { ["cardExpiration"] = DateTime.Now.AddYears(1) });
 
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.FindAsync(buyerId))
-                .Returns(Task.FromResult<Buyer>(FakeBuyer()));
+            _orderRepositoryMock.Setup(orderRepo => orderRepo.GetAsync(It.IsAny<int>()))
+               .Returns(Task.FromResult<Order>(FakeOrder()));
 
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
+            _orderRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
                 .Returns(Task.FromResult(1));
 
-            _orderRepositoryMock.Setup(or => or.Add(FakeOrder())).Returns(FakeOrder());
-            _orderRepositoryMock.Setup(or => or.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
-                .Returns(Task.FromResult(0));
             _identityServiceMock.Setup(svc => svc.GetUserIdentity()).Returns(buyerId);
 
             //Act
-            var handler = new CreateOrderCommandHandler(_buyerRepositoryMock.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
+            var handler = new CreateOrderCommandHandler(_mediator.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
             var result = await handler.Handle(fakeOrderCmd);
 
             //Assert
@@ -95,21 +87,15 @@ namespace UnitTest.Ordering.Application
             { ["cardExpiration"] = DateTime.Now.AddYears(-1) });
 
             // Arrange
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.FindAsync(buyerId))
-               .Returns(Task.FromResult<Buyer>(FakeBuyer()));
+            _orderRepositoryMock.Setup(orderRepo => orderRepo.GetAsync(It.IsAny<int>()))
+               .Returns(Task.FromResult<Order>(FakeOrder()));
 
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
-                .Returns(Task.FromResult(1));
-
-            _orderRepositoryMock.Setup(or => or.Add(FakeOrder()))
-                .Returns(FakeOrder());
-
-            _orderRepositoryMock.Setup(or => or.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
+            _orderRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
                 .Returns(Task.FromResult(1));
 
             _identityServiceMock.Setup(svc => svc.GetUserIdentity()).Returns(buyerId);
             //Act
-            var handler = new CreateOrderCommandHandler(_buyerRepositoryMock.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
+            var handler = new CreateOrderCommandHandler(_mediator.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
 
             //Assert
             await Assert.ThrowsAsync<ArgumentException>(async () => await handler.Handle(fakeOrderCmd));
@@ -128,21 +114,15 @@ namespace UnitTest.Ordering.Application
             });
 
             // Arrange
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.FindAsync(buyerId))
-               .Returns(Task.FromResult<Buyer>(FakeBuyer()));
+            _orderRepositoryMock.Setup(orderRepo => orderRepo.GetAsync(It.IsAny<int>()))
+               .Returns(Task.FromResult<Order>(FakeOrder()));
 
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
-                .Returns(Task.FromResult(1));
-
-            _orderRepositoryMock.Setup(or => or.Add(FakeOrder()))
-                .Returns(FakeOrder());
-
-            _orderRepositoryMock.Setup(or => or.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
+            _orderRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
                 .Returns(Task.FromResult(1));
 
             _identityServiceMock.Setup(svc => svc.GetUserIdentity()).Returns(buyerId);
             //Act
-            var handler = new CreateOrderCommandHandler(_buyerRepositoryMock.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
+            var handler = new CreateOrderCommandHandler(_mediator.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
 
             //Assert
             await Assert.ThrowsAsync<ArgumentException>(async () => await handler.Handle(fakeOrderCmd));
@@ -161,21 +141,15 @@ namespace UnitTest.Ordering.Application
             });
 
             // Arrange
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.FindAsync(buyerId))
-               .Returns(Task.FromResult<Buyer>(FakeBuyer()));
+            _orderRepositoryMock.Setup(orderRepo => orderRepo.GetAsync(It.IsAny<int>()))
+               .Returns(Task.FromResult<Order>(FakeOrder()));
 
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
-                .Returns(Task.FromResult(1));
-
-            _orderRepositoryMock.Setup(or => or.Add(FakeOrder()))
-                .Returns(FakeOrder());
-
-            _orderRepositoryMock.Setup(or => or.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
+            _orderRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
                 .Returns(Task.FromResult(1));
 
             _identityServiceMock.Setup(svc => svc.GetUserIdentity()).Returns(buyerId);
             //Act
-            var handler = new CreateOrderCommandHandler(_buyerRepositoryMock.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
+            var handler = new CreateOrderCommandHandler(_mediator.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
 
             //Assert
             await Assert.ThrowsAsync<ArgumentException>(async () => await handler.Handle(fakeOrderCmd));
@@ -185,7 +159,7 @@ namespace UnitTest.Ordering.Application
         public async Task Handle_throws_exception_when_no_cardNumber()
         {
 
-            var buyerId = "1234";
+            var orderId = "1234";
 
             var fakeOrderCmd = FakeOrderRequestWithBuyer(new Dictionary<string, object>
             {
@@ -194,21 +168,15 @@ namespace UnitTest.Ordering.Application
             });
 
             // Arrange
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.FindAsync(buyerId))
-               .Returns(Task.FromResult<Buyer>(FakeBuyer()));
+            _orderRepositoryMock.Setup(orderRepo => orderRepo.GetAsync(It.IsAny<int>()))
+               .Returns(Task.FromResult<Order>(FakeOrder()));
 
-            _buyerRepositoryMock.Setup(buyerRepo => buyerRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
+            _orderRepositoryMock.Setup(orderRepo => orderRepo.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
                 .Returns(Task.FromResult(1));
 
-            _orderRepositoryMock.Setup(or => or.Add(FakeOrder()))
-                .Returns(FakeOrder());
-
-            _orderRepositoryMock.Setup(or => or.UnitOfWork.SaveChangesAsync(default(CancellationToken)))
-                .Returns(Task.FromResult(1));
-
-            _identityServiceMock.Setup(svc => svc.GetUserIdentity()).Returns(buyerId);
+            _identityServiceMock.Setup(svc => svc.GetUserIdentity()).Returns(orderId);
             //Act
-            var handler = new CreateOrderCommandHandler(_buyerRepositoryMock.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
+            var handler = new CreateOrderCommandHandler(_mediator.Object, _orderRepositoryMock.Object, _identityServiceMock.Object);
 
             //Assert
             await Assert.ThrowsAsync<ArgumentException>(async () => await handler.Handle(fakeOrderCmd));
@@ -228,7 +196,7 @@ namespace UnitTest.Ordering.Application
 
         private Order FakeOrder()
         {
-            return new Order(1, 1, new Address("street", "city", "state", "country", "zipcode"));
+            return new Order(new Address("street", "city", "state", "country", "zipcode"), 1, "12", "111", "fakeName", DateTime.Now.AddYears(1));
         }
 
         private CreateOrderCommand FakeOrderRequestWithBuyer(Dictionary<string, object> args = null)
@@ -243,7 +211,9 @@ namespace UnitTest.Ordering.Application
                 cardExpiration: args != null && args.ContainsKey("cardExpiration") ? (DateTime)args["cardExpiration"] : DateTime.MinValue,
                 cardSecurityNumber: args != null && args.ContainsKey("cardSecurityNumber") ? (string)args["cardSecurityNumber"] : "123",
                 cardHolderName: args != null && args.ContainsKey("cardHolderName") ? (string)args["cardHolderName"] : "XXX",
-                cardTypeId: args != null && args.ContainsKey("cardTypeId") ? (int)args["cardTypeId"] : 0);
+                cardTypeId: args != null && args.ContainsKey("cardTypeId") ? (int)args["cardTypeId"] : 0,
+                paymentId: args != null && args.ContainsKey("paymentId") ? (int)args["paymentId"] : 0,
+                buyerId: args != null && args.ContainsKey("buyerId") ? (int)args["buyerId"] : 0);                
         }
     }
 }

test/Services/UnitTest/Ordering/Domain/BuyerAggregateTest.cs

@@ -40,11 +40,12 @@ public class BuyerAggregateTest
         var securityNumber = "1234";
         var cardHolderName = "FakeHolderNAme";
         var expiration = DateTime.Now.AddYears(1);
+        var orderId = 1;
         var identity = new Guid().ToString();
         var fakeBuyerItem = new Buyer(identity);
 
         //Act
-        var result = fakeBuyerItem.AddPaymentMethod(cardTypeId, alias, cardNumber, securityNumber, cardHolderName, expiration);
+        var result = fakeBuyerItem.AddPaymentMethod(cardTypeId, alias, cardNumber, securityNumber, cardHolderName, expiration, orderId);
 
         //Assert
         Assert.NotNull(result);