public bool ShouldTakeMemento(AggregateRoot aggregate)
{
if (!IsMementable(aggregate.GetType()))
{
return(false);
}
var aggregateVersion = aggregate.Version;
if (aggregateVersion < 2)
{
return(false);
}
IDomainEventProvider domainEventProvider = (IDomainEventProvider)aggregate;
var unCommitedChangesCount = domainEventProvider.GetUncommittedChanges().ToList().Count;
for (var j = 0; j < unCommitedChangesCount; j++)
{
if (++aggregateVersion % 3 == 0 && aggregateVersion != 0)
{
return(true);
}
}
return(false);
}
private Task <T> LoadAggregate(Guid id)
{
return(Task.Run(() => {
var aggregate = new T();
IDomainEventProvider domainEventProvider = (IDomainEventProvider)aggregate;
var events = _eventStore.LoadEventsFor(id, -1);
domainEventProvider.LoadFromHistory(events);
return aggregate;
}));
}
public void Save(T aggregate, int?expectedVersion = null)
{
lock (_locker.GetLock(aggregate.Id.ToString()))
{
IDomainEventProvider domainEventProvider = (IDomainEventProvider)aggregate;
var eventList = domainEventProvider.GetUncommittedChanges().ToList();
eventList.ForEach(e =>
{
if (e.Id == Guid.Empty)
{
e.Id = aggregate.Id;
}
if (e.Id == Guid.Empty)
{
throw new AggregateOrEventMissingIdException(
aggregate.GetType(), e.GetType());
}
});
_eventStore.Save(aggregate.Id, eventList);
domainEventProvider.MarkChangesAsCommitted();
}
}
