Edition 0 Updated to asp. Net core 0
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public
class CreateOrderCommandHandler : IRequestHandler > { private readonly IOrderRepository _orderRepository; private readonly IIdentityService _identityService; private readonly IMediator _mediator; private readonly IOrderingIntegrationEventService _orderingIntegrationEventService; private readonly ILogger // Using DI to inject infrastructure persistence Repositories public CreateOrderCommandHandler (IMediator mediator, IOrderingIntegrationEventService orderingIntegrationEventService, IOrderRepository orderRepository, IIdentityService identityService, ILogger { _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)); _logger = logger ?? throw new ArgumentNullException ( nameof (logger)); } 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 ); 270 CHAPTER 6 | Tackle Business Complexity in a Microservice with DDD and CQRS Patterns Yüklə 11,82 Mb. Dostları ilə paylaş:
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