public AggregateRoot RestoreFromSnapshot(Snapshot snapshot)
{
if (snapshot == null)
{
return(null);
}
var aggregateRootType = _aggregateRootTypeProvider.GetAggregateRootType(snapshot.AggregateRootName);
var aggregateRoot = _aggregateRootFactory.CreateAggregateRoot(aggregateRootType);
if (!IsSnapshotable(aggregateRoot))
{
throw new InvalidOperationException(string.Format("聚合根({0})没有实现ISnapshotable接口或者实现了多余1个的ISnapshotable接口，不能将其从某个快照还原。", aggregateRoot.GetType().FullName));
}
if (GetSnapshotDataType(aggregateRoot) != snapshot.Payload.GetType())
{
throw new InvalidOperationException(string.Format("当前聚合根的快照类型({0})与要还原的快照类型({1})不符", GetSnapshotDataType(aggregateRoot), snapshot.Payload.GetType()));
}
aggregateRoot.InitializeFromSnapshot(snapshot);
SnapshotterHelper.RestoreFromSnapshot(snapshot.Payload, aggregateRoot);
return(aggregateRoot);
}
public virtual Snapshot CreateSnapshot(AggregateRoot aggregateRoot)
{
if (aggregateRoot == null)
{
throw new ArgumentNullException("aggregateRoot");
}
if (!IsSnapshotable(aggregateRoot))
{
throw new InvalidOperationException(string.Format("聚合根({0})没有实现ISnapshotable接口或者实现了多余1个的ISnapshotable接口，不能对其创建快照。", aggregateRoot.GetType().FullName));
}
var snapshotDataType = GetSnapshotDataType(aggregateRoot);
var snapshotData = SnapshotterHelper.CreateSnapshot(snapshotDataType, aggregateRoot);
return(new Snapshot(aggregateRoot.GetType(), aggregateRoot.UniqueId, aggregateRoot.GetOriginalVersion(), snapshotData, DateTime.Now));
}