protected virtual async ValueTask OnArchiveCompleted()
{
//开始执行事件清理逻辑
var noCleareds = BriefArchiveList.Where(a => !a.EventIsCleared).ToList();
if (noCleareds.Count >= ArchiveOptions.MaxSnapshotArchiveRecords)
{
var minArchive = noCleareds.FirstOrDefault();
if (minArchive != default)
{
//判断需要清理的event是否都被follow执行过
var versions = await Task.WhenAll(FollowUnit.GetAndSaveVersionFuncs().Select(func => func(Snapshot.Base.StateId, Snapshot.Base.Version)));
if (versions.All(v => v >= minArchive.EndVersion))
{
//清理归档对应的事件
await ArchiveStorage.EventIsClear(Snapshot.Base.StateId, minArchive.Id);
minArchive.EventIsCleared = true;
//如果快照的版本小于需要清理的最大事件版本号，则保存快照
if (SnapshotEventVersion < minArchive.EndVersion)
{
var saveTask = SaveSnapshotAsync(true);
if (!saveTask.IsCompletedSuccessfully)
{
await saveTask;
}
}
if (ArchiveOptions.DeleteEvents)
{
await EventStorage.DeleteStart(Snapshot.Base.StateId, minArchive.EndVersion, Snapshot.Base.StartTimestamp);
}
else
{
await ArchiveStorage.EventArichive(Snapshot.Base.StateId, minArchive.EndVersion, Snapshot.Base.StartTimestamp);
}
ClearedArchive = minArchive;
//只保留一个清理过事件的快照，其它的删除掉
var cleareds = BriefArchiveList.Where(a => a.EventIsCleared).OrderBy(a => a.Index).ToArray();
if (cleareds.Length > 1)
{
for (int i = 0; i < cleareds.Length - 1; i++)
{
await DeleteArchive(cleareds[i].Id);
BriefArchiveList.Remove(cleareds[i]);
}
}
}
}
}
}
protected async Task Over()
{
if (Snapshot.Base.IsOver)
{
throw new StateIsOverException(Snapshot.Base.StateId.ToString(), GrainType);
}
if (Snapshot.Base.Version != Snapshot.Base.DoingVersion)
{
throw new StateInsecurityException(Snapshot.Base.StateId.ToString(), GrainType, Snapshot.Base.DoingVersion, Snapshot.Base.Version);
}
if (ArchiveOptions.On && ArchiveOptions.ArchiveEventOnOver)
{
var versions = await ObserverUnit.GetAndSaveVersion(Snapshot.Base.StateId, Snapshot.Base.Version);
if (versions.Any(v => v < Snapshot.Base.Version))
{
throw new ObserverNotCompletedException(GrainType.FullName, Snapshot.Base.StateId.ToString());
}
}
Snapshot.Base.IsOver = true;
Snapshot.Base.IsLatest = true;
if (SnapshotEventVersion != Snapshot.Base.Version)
{
var saveTask = SaveSnapshotAsync(true, true);
if (!saveTask.IsCompletedSuccessfully)
{
await saveTask;
}
}
else
{
await SnapshotStorage.Over(Snapshot.Base.StateId, true);
}
if (ArchiveOptions.On && ArchiveOptions.ArchiveEventOnOver)
{
await ArchiveStorage.DeleteAll(Snapshot.Base.StateId);
if (ArchiveOptions.EventArchiveType == EventArchiveType.Delete)
{
await EventStorage.DeleteStart(Snapshot.Base.StateId, Snapshot.Base.Version, Snapshot.Base.StartTimestamp);
}
else
{
await ArchiveStorage.EventArichive(Snapshot.Base.StateId, Snapshot.Base.Version, Snapshot.Base.StartTimestamp);
}
}
else
{
await ArchiveStorage.Over(Snapshot.Base.StateId, true);
}
}
