/// <summary>
/// save events to db then apply event to state
/// snapshot will be created for every 10 events
/// Returns id of the newly applied event(from db)
/// </summary>
public async Task <long> ApplyEvents(TEvent[] events, long?rootEventId = null, long?parentEventId = null)
{
var aggregateEvents = new AggregateEventBase[events.Length];
for (int i = 0; i < events.Length; i++)
{
// get event type
var type = events[i].GetType();
// get event type name and version
var eventIdentity = EventTypeHelper.GetEventIdentity(type);
// serialize event for db
var serialized = JsonSerializer.Serialize(events[i], type);
// increment aggregate version
_aggregateVersion++;
// add aggregateeventbase
aggregateEvents[i] = new AggregateEventBase
{
AggregateId = AggregateId,
AggregateVersion = _aggregateVersion,
Type = eventIdentity.Name,
EventVersion = eventIdentity.Version,
Data = serialized,
RootEventId = rootEventId,
ParentEventId = parentEventId,
Created = DateTime.UtcNow
};
}
var eventId = await _repository.SaveEvents(
_aggregateName,
aggregateEvents
);
for (int i = 0; i < events.Length; i++)
{
// update state
_aggregate.Apply(events[i]);
// save snapshot if ShouldSaveSnapshot returns true
if (_shouldSaveSnapshot(events[i], _aggregateVersion))
{
await SaveSnapshot();
}
}
// return id
return(eventId);
}
/// <summary>
/// save event to db then apply event to state
/// snapshot will be created for every 10 events
/// Returns id of the newly applied event(from db)
/// </summary>
public async Task <long> ApplyEvent(TEvent @event, long?rootEventId = null, long?parentEventId = null)
{
// get event type
var type = @event.GetType();
// get event type name and version
var eventIdentity = EventTypeHelper.GetEventIdentity(type);
// serialize event for db
var serialized = JsonSerializer.Serialize(@event, type);
// increment aggregate version
_aggregateVersion++;
// save event to db
var eventId = await _repository.SaveEvent(
_aggregateName,
new Persistance.AggregateEventBase
{
AggregateId = AggregateId,
AggregateVersion = _aggregateVersion,
Type = eventIdentity.Name,
EventVersion = eventIdentity.Version,
Data = serialized,
RootEventId = rootEventId,
ParentEventId = parentEventId,
Created = DateTime.UtcNow
}
);
// update state
_aggregate.Apply(@event);
// save snapshot if ShouldSaveSnapshot returns true
if (_shouldSaveSnapshot(@event, _aggregateVersion))
{
await SaveSnapshot();
}
// return id
return(eventId);
}
