/// <summary>
/// 从存储设备中查找一个聚合根
/// </summary>
private T GetFromStorage(string aggregateRootId)
{
T aggregateRoot = null;
long maxEventVersion = long.MaxValue;
long minEventVersion = long.MinValue;
//尝试从快照获取聚合根
bool success = TryGetFromSnapshot(aggregateRootId, maxEventVersion, out aggregateRoot);
//如果从快照获取不成功，则尝试从第一个事件开始重演所有事件从而得到聚合根
if (!success)
{
var allCommittedEvents = _eventStoreProvider.GetEventStore <T>().GetEvents(aggregateRootId, minEventVersion, maxEventVersion);
aggregateRoot = BuildAggregateRootFromCommittedEvents(allCommittedEvents);
}
//最后返回聚合根
return(aggregateRoot);
}
public void PersistEvents(IEnumerable <AggregateRootEvent> aggregateRootEvents)
{
eventStoreProvider.GetEventStore <TAggregateRoot>().StoreEvents(aggregateRootEvents);
}