public async void Update(string orderNumber, BusinessEvent e)
{
string eventType = e.GetType().Name;
string eventData = JsonSerializer.Serialize(e, e.GetType());
using (var dbContext = new EventStoreDBContext())
{
OrderAggregate order = dbContext.Orders.FirstOrDefault(o => o.OrderNumber == orderNumber);
int nextVersion = 1;
if (order == null)
{
order = new OrderAggregate {
OrderNumber = orderNumber
};
dbContext.Orders.Add(order);
}
else
{
await dbContext.Entry(order).Collection(o => o.Events).LoadAsync();
nextVersion = order.Events.Max(e => e.Version) + 1;
}
order.CurrentVersion = nextVersion;
order.Events.Add(new OrderEvent
{
OrderNumber = orderNumber,
Version = nextVersion,
Timestamp = DateTime.Now,
EventType = eventType,
EventData = eventData
});
await dbContext.SaveChangesAsync();
}
}
public Order GetByOrderNumber(string orderNumber)
{
using (var dbContext = new EventStoreDBContext())
{
var order = dbContext.Orders.FirstOrDefault(o => o.OrderNumber == orderNumber);
if (order == null)
{
return(null);
}
List <BusinessEvent> events = new List <BusinessEvent>();
dbContext.Entry(order).Collection(o => o.Events).Load();
foreach (OrderEvent orderEvent in order.Events.OrderBy(e => e.Version))
{
string eventTypeDescriptor = $"Store.OrderProcessingService.Domain.Events.{orderEvent.EventType}";
Type eventType = Type.GetType(eventTypeDescriptor);
string eventData = orderEvent.EventData;
dynamic e = JsonSerializer.Deserialize(eventData, eventType);
events.Add(e);
}
return(new Order(events));
}
}
