public async Task <Optional <TAggregateRoot> > GetAsync(string identifier)
{
Optional <Aggregate> existingAggregate = GetAggregateFromChangeTrackerIfExits(identifier);
if (existingAggregate.HasValue)
{
return(new Optional <TAggregateRoot>((TAggregateRoot)existingAggregate.Value.Root));
}
var snapshotStreamName = _streamNameProvider.GetSnapshotStreamName(typeof(TAggregateRoot), identifier);
Optional <Snapshot> snapshot = await _snapshotStore.GetLastSnapshot(snapshotStreamName);
var version = StreamPosition.Start;
if (snapshot.HasValue)
{
version = snapshot.Value.Version + 1;
}
var aggregate = await _aggregateStore.Load <TAggregateRoot>(identifier, version);
AttachAggregateToChangeTracker(aggregate);
return(new Optional <TAggregateRoot>((TAggregateRoot)aggregate.Root));
}
