protected async ValueTask<bool> RaiseEvent(IEventBase<K> @event, string uniqueId = null, string hashKey = null)
{
try
{
this.State.IncrementDoingVersion();//标记将要处理的Version
@event.StateId = GrainId;
@event.Version = this.State.Version + 1;
@event.Timestamp = DateTime.UtcNow;
using (var ms = new PooledMemoryStream())
{
Serializer.Serialize(ms, @event);
var bytes = ms.ToArray();
var result = await EventStorage.SaveAsync(@event, bytes, uniqueId);
if (result)
{
EventHandle.Apply(this.State, @event);
await AfterEventSavedHandle(@event, bytes, hashKey: hashKey);
this.State.UpdateVersion(@event);//更新处理完成的Version
await SaveSnapshotAsync();
return true;
}
else
this.State.DecrementDoingVersion();//还原doing Version
}
}
catch (Exception ex)
{
this.GetLogger("Event_Raise").Log(LogCodes.EventRaiseError, Orleans.Runtime.Severity.Error, $"applay event {@event.TypeCode} error, eventId={@event.Version}", null, ex);
await OnActivateAsync();//重新激活Actor
throw ex;
}
return false;
}
protected override void Apply(AccountState state, IEventBase <long> evt)
{
EventHandle.Apply(state, evt);
}