public TProjector GetById <TProjector, TViewModel>(IIdentity id, Int32 to)
where TProjector : Projector <TViewModel>
where TViewModel : BaseAggregateQueryModel, new()
{
var snapshotTypeName = typeof(TProjector).Name;
var snapshot = _snapshotPersister.Load(id.AsString(), to, snapshotTypeName);
var projector = _factory.Create <TViewModel>(typeof(TProjector), id);
Int32 startsFromEvent = 0;
IMementoEx memento = snapshot == null ? null : (IMementoEx)snapshot.Payload;
if (memento != null)
{
if (!projector.ValidateMemento(memento))
{
_snapshotPersister.Clear(id.AsString(), memento.Version, snapshotTypeName);
}
else
{
projector.Restore(memento);
startsFromEvent = snapshot.StreamRevision;
}
}
using (var events = _eventStore.OpenStream(projector.BucketId, id.AsString(), startsFromEvent, to))
{
Int32 eventCount = 0;
foreach (var evt in events.CommittedEvents)
{
projector.ApplyEvent((DomainEvent)evt.Body);
eventCount++;
}
if (projector.ShouldSnapshot(eventCount))
{
memento = projector.GetSnapshot();
snapshot = new Snapshot(id.AsString(), events.StreamRevision, memento);
_snapshotPersister.Persist(snapshot, snapshotTypeName);
}
}
return((TProjector)projector);
}
public void Snapshot(IAggregateEx aggregate, String bucket, Int32 numberOfEventsSaved)
{
if (SnapshotsSettings.HasOptedOut(aggregate.GetType()))
{
return;
}
var memento = aggregate.GetSnapshot();
var snapshot = new Snapshot(bucket, aggregate.Id.AsString(), aggregate.Version, memento);
if (_cacheEnabled)
{
_cache.Set(aggregate.Id.AsString(), snapshot, _standardCachePolicy);
}
if (_snapshotPersistenceStrategy.ShouldSnapshot(aggregate, numberOfEventsSaved))
{
_persister.Persist(snapshot, aggregate.GetType().FullName);
}
}
