private void Update(string userId, Action <UserAR> updateAction)
{
var snapshot = _snapshotRepository.Load(userId);
var startVersion = snapshot == null ? 0 : snapshot.StreamVersion + 1;
var stream = _eventStore.OpenStream(userId, startVersion, int.MaxValue);
var user = new UserAR(snapshot, stream);
updateAction(user);
var originalVersion = stream.GetVersion();
_eventStore.AppendToStream(userId, originalVersion, user.Changes);
var newVersion = originalVersion + 1;
if (newVersion % SnapshotInterval == 0)
{
_snapshotRepository.Save(new Snapshot(userId, newVersion, user.State));
}
}
public TAggregate GetById <TAggregate>(String id)
where TAggregate : AggregateRoot
{
if (String.IsNullOrEmpty(id))
{
throw new ArgumentException("Aggregate id was not specified.");
}
Snapshot snapshot = null;
if (_snapshotRepository != null)
{
snapshot = _snapshotRepository.Load <TAggregate>(id);
}
var obj = snapshot == null
? AggregateCreator.CreateAggregateRoot <TAggregate>()
: (TAggregate)snapshot.Payload;
var fromVersion = snapshot == null ? 0 : snapshot.StreamVersion + 1;
var stream = _transitionStorage.OpenStream(id, fromVersion, int.MaxValue);
obj.LoadFromTransitionStream(stream);
return(obj);
}