/// <summary>
/// Initializes a new instance of the <see cref="EfAggregateMemento" /> class.
/// </summary>
/// <param name="aggregate">The aggregate instance.</param>
protected EfAggregateMemento(EventSourcedAggregateRoot aggregate) : this()
{
if (aggregate == null)
{
throw new ArgumentNullException(nameof(aggregate));
}
AggregateRootId = aggregate.Id;
LastEventSequence = aggregate.LastEventSequence;
Version = aggregate.Version;
Payload = JsonObjectSerializer.New().Serialize(aggregate);
}
/// <summary>
/// Initializes a new instance of the <see cref="EfDomainEvent" /> class.
/// </summary>
/// <param name="eventWrapper">The domain eventWrapper.</param>
protected EfDomainEvent(DomainEventEnvelope eventWrapper)
{
Check.NotNull(eventWrapper, nameof(eventWrapper));
var jsonObjectSerializer = new JsonObjectSerializer();
EventId = eventWrapper.EventId;
Name = eventWrapper.EventName;
AggregateId = eventWrapper.AggregateId;
Sequence = eventWrapper.Sequence;
CreatedOnUtc = eventWrapper.CreatedOnUtc;
Payload = jsonObjectSerializer.Serialize(eventWrapper.Event);
AggregateVersion = eventWrapper.AggregateVersion;
}
public Tuple <TAggregateRoot, int> GetLatestSnapshot(Guid aggregateId)
{
var lastEventSequence = 0;
var snapshotSet = Context.Set <TAggregateMemento>();
var snapshot =
snapshotSet.AsNoTracking()
.OrderByDescending(s => s.LastEventSequence)
.FirstOrDefault(x => x.AggregateRootId == aggregateId);
if (snapshot == null)
{
return(null);
}
lastEventSequence = snapshot.LastEventSequence;
var stringSerializer = new JsonObjectSerializer();
var aggregateRoot = stringSerializer.Deserialize <TAggregateRoot>(snapshot.Payload);
return(new Tuple <TAggregateRoot, int>(aggregateRoot, lastEventSequence));
}