public override async Task <int> SaveChangesAsync(
CancellationToken cancellationToken = default(CancellationToken))
{
// TODO: What exception handling/unwrapping that needs to take place?
// TODO: Concerned about single responsibility. This has two:
// TODO: 1. Persisting data to DB
// TODO: 2. Publishing events to propagate side-effects
// TODO: Consider pulling the event dispatching out
// TODO: and handling elsewhere.
var aggregatesWithDomainEvents = ChangeTracker.Entries <IAggregateRoot>()
.Select(e => e.Entity)
.Where(e => e.Events.Any())
.ToArray();
await _dispatcher
.DispatchAndClearDomainEventsAsync(aggregatesWithDomainEvents);
// TODO: Get time span from configuration
_integrationEvents.CopyToOutbox(_outboxService, TimeSpan.FromDays(7));
var saveResult =
await base.SaveChangesAsync(cancellationToken); // Aggregate and outbox changes
var publishedEvents = await _integrationEvents
.PublishToBus(_busSender);
// TODO: Add scheduled retries for packages left in outbox
publishedEvents.RemoveFromOutbox(_outboxService);
await base.SaveChangesAsync(cancellationToken); // Outbox changes
return(saveResult);
}