protected override sealed async Task PersistModelAsync(PersistEvent @event, TModel model, Graph <TModel> graph, bool create)
{
var id = ModelAnalyzer.GetIdentity(model);
var streamName = EventStoreCommon.GetStreamName <TModel>(id);
var eventStoreModel = new EventStoreEventModelData <TModel>()
{
Source = @event.Source,
SourceType = @event.Source?.GetType().Name,
Model = model,
Graph = graph
};
var data = EventStoreCommon.Serialize(eventStoreModel);
var eventNumber = await Engine.AppendAsync(@event.ID, @event.Name, streamName, null, create?EventStoreState.NotExisting : EventStoreState.Existing, data);
if (eventNumber > 0 && eventNumber % SaveStateEvery == 0)
{
var thisEventData = (await Engine.ReadBackwardsAsync(streamName, eventNumber, 1, null, null, null))[0];
var where = ModelAnalyzer.GetIdentityExpression <TModel>(id);
var eventStates = await Repo.QueryAsync(new EventQueryMany <TModel>(thisEventData.Date, thisEventData.Date, where));
var eventState = eventStates.Where(x => x.Number == eventNumber).Single();
await SaveModelStateAsync(id, eventState.Model, eventState.Number);
}
}
public async Task Append <TEvent>(TEvent @event, bool validateEventNumber = false) where TEvent : IEvent
{
var eventType = typeof(TEvent);
var eventName = eventType.Name;
await ApplyEvent(@event, eventType);
var eventBytes = EventStoreCommon.Serialize(@event);
await this.eventStore.AppendAsync(Guid.NewGuid(), eventName, streamName, validateEventNumber?LastEventNumber : null, validateEventNumber?(LastEventNumber.HasValue ? EventStoreState.NotExisting : EventStoreState.Existing) : EventStoreState.Any, eventBytes);
await Bus.DispatchAsync(@event);
}
private void SaveModelState(object id, TModel model, ulong eventNumber)
{
var streamName = EventStoreCommon.GetStateStreamName <TModel>(id);
var eventState = new EvenStoreStateData <TModel>()
{
Model = model,
Number = eventNumber,
Deleted = model == null
};
var data = EventStoreCommon.Serialize(eventState);
Engine.Append(Guid.NewGuid(), "StoreState", streamName, null, EventStoreState.Any, data);
}