public override Task SaveAsync(TAggregateRoot aggregateRoot)
{
if (aggregateRoot == null)
{
throw new ArgumentNullException(nameof(aggregateRoot));
}
var uncommittedEvents = DispatchEvents(aggregateRoot).ToArray();
if (uncommittedEvents.Any())
{
using (var stream = _eventStore.OpenStream(typeof(TAggregateRoot).FullName, aggregateRoot.Identity, (int)uncommittedEvents.First().Version))
{
var commitId = OperationContext.CommandId ?? Guid.NewGuid();
foreach (var @event in uncommittedEvents)
{
var headers = new Dictionary <string, object>
{
{ KnownHeaders.EventClrType, @event.GetType().AssemblyQualifiedName },
{ KnownHeaders.AggregateRootClrType, typeof(TAggregateRoot).AssemblyQualifiedName }
};
if (OperationContext.CorrelationId.HasValue)
{
headers.Add(KnownHeaders.CorrelationId, OperationContext.CorrelationId);
}
if (OperationContext.UserId.HasValue)
{
@event.CreatedBy = OperationContext.UserId.Value;
headers.Add(KnownHeaders.UserId, OperationContext.UserId);
}
stream.Add(new EventMessage
{
Body = @event,
Headers = headers.Union(OperationContext.CustomParameters()).ToDictionary(k => k.Key, v => v.Value)
});;
}
try
{
stream.CommitChanges(commitId);
}
catch (DuplicateCommitException dce)
{
stream.ClearChanges();
_logger.LogWarning($"Duplicate commit {commitId} detected, skipping...", dce);
}
catch (global::NEventStore.ConcurrencyException cex)
{
stream.ClearChanges();
throw new ConcurrencyException(cex.Message, cex);
}
catch
{
stream.ClearChanges();
throw;
}
finally
{
aggregateRoot.ClearEvents();
}
}
}
return(Task.CompletedTask);
}