/// <summary>
/// save event to db then apply event to state
/// snapshot will be created for every 20 events
/// Returns id of the newly applied event(from db)
/// </summary>
protected async Task <long> ApplyEvent(TEvent @event, long?rootEventId = null, long?parentEventId = null)
{
// apply event to EventSource
var eventId = await EventSource.ApplyEvent(@event, rootEventId, parentEventId);
// does this aggregate has aggregate stream settings
if (_hasAggregateStream)
{
// notify AggregateStreamGrain about new event
var aggregateGrain = GrainFactory.GetGrain <IAggregateStreamGrain>(_aggregateName);
// fire and forget request
aggregateGrain.InvokeOneWay(handler => handler.Notify(eventId));
}
// return eventId
return(eventId);
}