public async Task HandleAsync(CreateOrder command)
{
var exists = await _repository.ExistsAsync(o => o.Id == command.OrderId);
if (exists)
{
throw new InvalidOperationException($"Order with given id: {command.OrderId} already exists!");
}
_logger.LogInformation($"Fetching a price for order with id: {command.OrderId}...");
var pricingDto = await _pricingServiceClient.GetAsync(command.OrderId);
if (pricingDto is null)
{
throw new InvalidOperationException($"Pricing was not found for order: {command.OrderId}");
}
_logger.LogInformation($"Order with id: {command.OrderId} will cost: {pricingDto.TotalAmount}$.");
var order = new Order(command.OrderId, command.CustomerId, pricingDto.TotalAmount);
await _repository.AddAsync(order);
_logger.LogInformation($"Created an order with id: {command.OrderId}, customer: {command.CustomerId}.");
var spanContext = _tracer.ActiveSpan.Context.ToString();
var @event = new OrderCreated(order.Id);
if (_outbox.Enabled)
{
await _outbox.SendAsync(@event, spanContext : spanContext);
return;
}
await _publisher.PublishAsync(@event, spanContext : spanContext);
}
private async Task SendAsync(IEnumerable <ICommand> commands)
{
if (commands is null)
{
return;
}
var messageProperties = _messagePropertiesAccessor.MessageProperties;
var originatedMessageId = messageProperties?.MessageId;
var correlationId = _correlationIdFactory.Create();
var spanContext = messageProperties?.GetSpanContext(_spanContextHeader);
if (string.IsNullOrWhiteSpace(spanContext))
{
spanContext = _tracer.ActiveSpan is null ? string.Empty : _tracer.ActiveSpan.Context.ToString();
}
var correlationContext = _contextAccessor.CorrelationContext ??
_httpContextAccessor.GetCorrelationContext();
var headers = new Dictionary <string, object>();
foreach (var @event in commands)
{
if (@event is null)
{
continue;
}
var messageId = Guid.NewGuid().ToString("N");
_logger.LogTrace($"Publishing integration event: {@event.GetType().Name.Underscore()} [ID: '{messageId}'].");
if (_outbox.Enabled)
{
await _outbox.SendAsync(@event, originatedMessageId, messageId, correlationId, spanContext,
correlationContext, headers);
continue;
}
await _busPublisher.PublishAsync(@event, messageId, correlationId, spanContext, correlationContext,
headers);
}
}
public async Task PublishAsync(IEnumerable <IEvent> events)
{
if (events is null)
{
return;
}
var messageProperties = _messagePropertiesAccessor.MessageProperties;
var originatedMessageId = messageProperties?.MessageId;
var correlationId = messageProperties?.CorrelationId;
var spanContext = messageProperties?.GetSpanContext(_spanContextHeader);
if (string.IsNullOrWhiteSpace(spanContext))
{
spanContext = _tracer.ActiveSpan is null ? string.Empty : _tracer.ActiveSpan.Context.ToString();
}
var headers = messageProperties.GetHeadersToForward();
var correlationContext = _contextAccessor.CorrelationContext ??
_httpContextAccessor.GetCorrelationContext();
foreach (var @event in events)
{
if (@event is null)
{
continue;
}
var messageId = Guid.NewGuid().ToString("N");
_logger.LogTrace($"Publishing integration event: {@event.GetType().Name} [id: '{messageId}'].");
if (_outbox.Enabled)
{
await _outbox.SendAsync(@event, originatedMessageId, messageId, correlationId, spanContext,
correlationContext, headers);
continue;
}
await _busPublisher.PublishAsync(@event, messageId, correlationId, spanContext, correlationContext,
headers);
}
}