This repository has been archived by the owner on Nov 17, 2023. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 10.4k
/
CreateOrderCommandHandler.cs
72 lines (62 loc) · 3.52 KB
/
CreateOrderCommandHandler.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
{
using Domain.AggregatesModel.OrderAggregate;
using global::Ordering.API.Application.IntegrationEvents;
using global::Ordering.API.Application.IntegrationEvents.Events;
using MediatR;
using Microsoft.eShopOnContainers.Services.Ordering.API.Infrastructure.Services;
using Microsoft.eShopOnContainers.Services.Ordering.Infrastructure.Idempotency;
using System;
using System.Threading;
using System.Threading.Tasks;
// Regular CommandHandler
public class CreateOrderCommandHandler
: IRequestHandler<CreateOrderCommand, bool>
{
private readonly IOrderRepository _orderRepository;
private readonly IIdentityService _identityService;
private readonly IMediator _mediator;
private readonly IOrderingIntegrationEventService _orderingIntegrationEventService;
// Using DI to inject infrastructure persistence Repositories
public CreateOrderCommandHandler(IMediator mediator,
IOrderingIntegrationEventService orderingIntegrationEventService,
IOrderRepository orderRepository,
IIdentityService identityService)
{
_orderRepository = orderRepository ?? throw new ArgumentNullException(nameof(orderRepository));
_identityService = identityService ?? throw new ArgumentNullException(nameof(identityService));
_mediator = mediator ?? throw new ArgumentNullException(nameof(mediator));
_orderingIntegrationEventService = orderingIntegrationEventService ?? throw new ArgumentNullException(nameof(orderingIntegrationEventService));
}
public async Task<bool> Handle(CreateOrderCommand message, CancellationToken cancellationToken)
{
// Add Integration event to clean the basket
var orderStartedIntegrationEvent = new OrderStartedIntegrationEvent(message.UserId);
await _orderingIntegrationEventService.AddAndSaveEventAsync(orderStartedIntegrationEvent);
// Add/Update the Buyer 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 address = new Address(message.Street, message.City, message.State, message.Country, message.ZipCode);
var order = new Order(message.UserId, message.UserName, address, message.CardTypeId, message.CardNumber, message.CardSecurityNumber, message.CardHolderName, message.CardExpiration);
foreach (var item in message.OrderItems)
{
order.AddOrderItem(item.ProductId, item.ProductName, item.UnitPrice, item.Discount, item.PictureUrl, item.Units);
}
_orderRepository.Add(order);
return await _orderRepository.UnitOfWork
.SaveEntitiesAsync();
}
}
// Use for Idempotency in Command process
public class CreateOrderIdentifiedCommandHandler : IdentifiedCommandHandler<CreateOrderCommand, bool>
{
public CreateOrderIdentifiedCommandHandler(IMediator mediator, IRequestManager requestManager) : base(mediator, requestManager)
{
}
protected override bool CreateResultForDuplicateRequest()
{
return true; // Ignore duplicate requests for creating order.
}
}
}