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 virtual async ValueTask OnRaiseStart(IFullyEvent <PrimaryKey> @event)
{
if (Snapshot.Base.Version == 0)
{
return;
}
if (Snapshot.Base.IsLatest)
{
await SnapshotStorage.UpdateIsLatest(Snapshot.Base.StateId, false);
Snapshot.Base.IsLatest = false;
}
if (ClearedArchive != default && @event.Base.Timestamp < ClearedArchive.StartTimestamp)
{
throw new EventIsClearedException(@event.GetType().FullName, Serializer.SerializeToString(@event), ClearedArchive.Index);
}
if (SnapshotEventVersion > 0)
{
if (@event.Base.Timestamp < Snapshot.Base.LatestMinEventTimestamp)
{
await SnapshotStorage.UpdateLatestMinEventTimestamp(Snapshot.Base.StateId, @event.Base.Timestamp);
}
if (@event.Base.Timestamp < Snapshot.Base.StartTimestamp)
{
await SnapshotStorage.UpdateStartTimestamp(Snapshot.Base.StateId, @event.Base.Timestamp);
}
}
if (ArchiveOptions.On &&
LastArchive != default &&
@event.Base.Timestamp < LastArchive.EndTimestamp)
{
foreach (var archive in BriefArchiveList.Where(a => @event.Base.Timestamp < a.EndTimestamp && !a.EventIsCleared).OrderByDescending(v => v.Index))
{
if (@event.Base.Timestamp < archive.EndTimestamp)
{
await DeleteArchive(archive.Id);
if (NewArchive != default)
{
NewArchive = CombineArchiveInfo(archive, NewArchive);
}
else
{
NewArchive = archive;
}
BriefArchiveList.Remove(archive);
}
}
LastArchive = BriefArchiveList.LastOrDefault();
}
}
/// <summary>
/// Grain激活时调用用来初始化的方法(禁止在子类重写,请使用)
/// </summary>
/// <returns></returns>
public override async Task OnActivateAsync()
{
var dITask = DependencyInjection();
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace("Start activation with id = {0}", GrainId.ToString());
}
if (!dITask.IsCompletedSuccessfully)
{
await dITask;
}
try
{
if (ArchiveOptions.On)
{
//加载归档信息
BriefArchiveList = (await ArchiveStorage.GetBriefList(GrainId)).OrderBy(a => a.Index).ToList();
LastArchive = BriefArchiveList.LastOrDefault();
ClearedArchive = BriefArchiveList.Where(a => a.EventIsCleared).OrderByDescending(a => a.Index).FirstOrDefault();
var secondLastArchive = BriefArchiveList.Count > 1 ? BriefArchiveList.SkipLast(1).Last() : default;
if (LastArchive != default && !LastArchive.IsCompletedArchive(ArchiveOptions, secondLastArchive) && !LastArchive.EventIsCleared)
{
await DeleteArchive(LastArchive.Id);
BriefArchiveList.Remove(LastArchive);
NewArchive = LastArchive;
LastArchive = BriefArchiveList.LastOrDefault();
}
}
//修复状态
await RecoverySnapshot();
if (ArchiveOptions.On)
{
if (Snapshot.Base.Version != 0 &&
(LastArchive == default || LastArchive.EndVersion < Snapshot.Base.Version) &&
(NewArchive == default || NewArchive.EndVersion < Snapshot.Base.Version))
{
//归档恢复
while (true)
{
var startTimestamp = Snapshot.Base.StartTimestamp;
long startVersion = 0;
if (NewArchive != default)
{
startVersion = NewArchive.EndVersion;
startTimestamp = NewArchive.StartTimestamp;
}
else if (NewArchive == default && LastArchive != default)
{
startVersion = LastArchive.EndVersion;
startTimestamp = LastArchive.EndTimestamp;
}
var eventList = await EventStorage.GetList(GrainId, startTimestamp, startVersion + 1, startVersion + CoreOptions.NumberOfEventsPerRead);
foreach (var @event in eventList)
{
var task = EventArchive(@event);
if (!task.IsCompletedSuccessfully)
{
await task;
}
}
if (eventList.Count < CoreOptions.NumberOfEventsPerRead)
{
break;
}
}
;
}
}
var onActivatedTask = OnBaseActivated();
if (!onActivatedTask.IsCompletedSuccessfully)
{
await onActivatedTask;
}
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace("Activation completed with id = {0}", GrainId.ToString());
}
}
catch (Exception ex)
{
Logger.LogCritical(ex, "Activation failed with Id = {0}", GrainId.ToString());
throw;
}
}