public void Save(IAggregateRoot aggregateRoot, int expectedVersion)
{
var domainEvents = aggregateRoot.UncommittedEvents as IDomainEvent[] ?? aggregateRoot.UncommittedEvents.ToArray();
if (aggregateRoot.Snapshotted)
{
foreach (var snapshot in aggregateRoot.Snapshots)
{
PersistSnapshot(SnapshotObject.FromSnapshot(snapshot));
}
}
SaveEvents(aggregateRoot.Id, domainEvents, expectedVersion);
Task.Factory.StartNew(() => PublishEvents(domainEvents));
}
/// <summary>
/// 从快照创建快照持久化对象
/// </summary>
/// <param name="snapshot">领域事件</param>
/// <returns></returns>
public static SnapshotObject FromSnapshot(ISnapshot snapshot)
{
var obj = new SnapshotObject
{
SourceId = snapshot.SourceId,
Timestamp = DateTime.UtcNow,
Version = snapshot.Version,
};
var serializer = App.Container.Resolve <IObjectSerializer <string> >();
string typeName;
obj.Data = serializer.Serialize(snapshot, out typeName);
obj.Type = typeName;
return(obj);
}
/// <summary> /// 持久化快照 /// </summary> /// <param name="snapshotObject"></param> protected abstract void PersistSnapshot(SnapshotObject snapshotObject);
public ISnapshot GetSnapshot(Guid sourceId)
{
var snapshotObj = LoadSnapshotObject(sourceId);
return(null == snapshotObj ? null : SnapshotObject.ToSnapshot(snapshotObj));
}
/// <summary>
/// 从持久化数据加载快照
/// </summary>
/// <param name="obj">持久化数据</param>
/// <returns></returns>
public static ISnapshot ToSnapshot(SnapshotObject obj)
{
var serializer = App.Container.Resolve <IObjectSerializer <string> >();
return((ISnapshot)serializer.Deserialize(obj.Data, obj.Type));
}