private void OnEventAppeared(EventStoreCatchUpSubscription subscription, ResolvedEvent resolvedEvent)
{
var maybeEvent = _eventSerializer.FromEventData(resolvedEvent.Event);
maybeEvent.Match(
@event =>
{
var originalPosition = resolvedEvent.OriginalPosition;
var eventHasBeenDeleted = originalPosition == null;
if (eventHasBeenDeleted)
{
return;
}
_blockingCollection.Add(@event);
},
() => { });
}
private async Task <Option <UserIndexedByEmail> > ReadUserByEmailIndexedEventAsync(string email)
{
var maybeResolvedEvent = await _connection.ReadLastStreamEvent(StreamBy(email));
return(maybeResolvedEvent.Map(
resolvedEvent =>
{
var fromEventData = _eventSerializer.FromEventData(resolvedEvent.OriginalEvent);
if (!fromEventData.HasValue)
{
throw new Exception($"Could not read event of type {resolvedEvent.OriginalEvent.EventType}");
}
var @event = fromEventData.ValueOrFailure();
if (!(@event is UserIndexedByEmail))
{
var message = $"Expected event of type {typeof (UserIndexedByEmail).FullName} " +
"but was '{@event.GetType().FullName}'";
throw new Exception(message);
}
return @event as UserIndexedByEmail;
}));
}