public void Save(AggregateRoot aggregate)
{
if (String.IsNullOrEmpty(aggregate.Id))
{
throw new ArgumentException("Aggregate id was not specified.");
}
var transition = aggregate.CreateTransition(_dataTypeRegistry);
using (var stream = _transitionStorage.OpenStream(transition.Id.StreamId))
{
stream.Write(transition);
}
if (_eventBus != null)
{
_eventBus.Publish(transition.Events.Select(e => (IEvent)e.Data).ToList <IEvent>());
}
if (_snapshotRepository != null)
{
aggregate.Version += 1; // we have to increase aggregate version, because of new transition increase aggregate version
_snapshotRepository.Save(new Snapshot(aggregate.Id, transition.Id.Version, aggregate));
}
}
public async Task Save <T>(T aggregate)
where T : AggregateRoot
{
if (IsSnapshotable(typeof(T)))
{
await _snapshotRepository.Save(aggregate);
}
else
{
await _eventRepository.Save(aggregate);
}
}
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));
}
}