protected virtual async Task <bool> RaiseEvent(IEvent @event, EventUID uniqueId = null)
{
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace("Start raise event, grain Id ={0} and state version = {1},event type = {2} ,event ={3},uniqueueId= {4}", GrainId.ToString(), Snapshot.Base.Version, @event.GetType().FullName, Serializer.SerializeToString(@event), uniqueId);
}
if (Snapshot.Base.IsOver)
{
throw new StateIsOverException(Snapshot.Base.StateId.ToString(), GrainType);
}
try
{
var fullyEvent = new FullyEvent <PrimaryKey>
{
Event = @event,
Base = new EventBase
{
Version = Snapshot.Base.Version + 1
},
StateId = Snapshot.Base.StateId
};
if (uniqueId == default)
{
uniqueId = EventUID.Empty;
}
if (string.IsNullOrEmpty(uniqueId.UID))
{
fullyEvent.Base.Timestamp = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
}
else
{
fullyEvent.Base.Timestamp = uniqueId.Timestamp;
}
var startTask = OnRaiseStart(fullyEvent);
if (!startTask.IsCompletedSuccessfully)
{
await startTask;
}
Snapshot.Base.IncrementDoingVersion(GrainType);//标记将要处理的Version
var bytesTransport = new EventBytesTransport
{
EventType = @event.GetType().FullName,
GrainId = Snapshot.Base.StateId,
EventBytes = Serializer.SerializeToBytes(@event),
BaseBytes = fullyEvent.Base.GetBytes()
};
if (await EventStorage.Append(fullyEvent, bytesTransport, uniqueId.UID))
{
Snapshot.Apply(EventHandler, fullyEvent);
Snapshot.Base.UpdateVersion(fullyEvent.Base, GrainType);//更新处理完成的Version
var task = OnRaiseSuccessed(fullyEvent, bytesTransport);
if (!task.IsCompletedSuccessfully)
{
await task;
}
var saveSnapshotTask = SaveSnapshotAsync();
if (!saveSnapshotTask.IsCompletedSuccessfully)
{
await saveSnapshotTask;
}
var handlers = FollowUnit.GetAllEventHandlers();
if (handlers.Count > 0)
{
try
{
if (CoreOptions.PriorityAsyncEventBus)
{
try
{
var publishTask = EventBusProducer.Publish(bytesTransport.GetBytes(), GrainId.ToString());
if (!publishTask.IsCompletedSuccessfully)
{
await publishTask;
}
}
catch (Exception ex)
{
Logger.LogError(ex, "EventBus error,state Id ={0}, version ={1}", GrainId.ToString(), Snapshot.Base.Version);
//当消息队列出现问题的时候同步推送
await Task.WhenAll(handlers.Select(func => func(bytesTransport.GetBytes())));
}
}
else
{
try
{
await Task.WhenAll(handlers.Select(func => func(bytesTransport.GetBytes())));
}
catch (Exception ex)
{
Logger.LogError(ex, "EventBus error,state Id ={0}, version ={1}", GrainId.ToString(), Snapshot.Base.Version);
//当消息队列出现问题的时候异步推送
var publishTask = EventBusProducer.Publish(bytesTransport.GetBytes(), GrainId.ToString());
if (!publishTask.IsCompletedSuccessfully)
{
await publishTask;
}
}
}
}
catch (Exception ex)
{
Logger.LogError(ex, "EventBus error,state Id ={0}, version ={1}", GrainId.ToString(), Snapshot.Base.Version);
}
}
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace("Raise event successfully, grain Id= {0} and state version = {1}}", GrainId.ToString(), Snapshot.Base.Version);
}
return(true);
}
else
{
if (Logger.IsEnabled(LogLevel.Information))
{
Logger.LogInformation("Raise event failure because of idempotency limitation, grain Id = {0},state version = {1},event type = {2} with version = {3}", GrainId.ToString(), Snapshot.Base.Version, @event.GetType().FullName, fullyEvent.Base.Version);
}
var task = OnRaiseFailed(fullyEvent);
if (!task.IsCompletedSuccessfully)
{
await task;
}
Snapshot.Base.DecrementDoingVersion();//还原doing Version
}
}
catch (Exception ex)
{
if (Logger.IsEnabled(LogLevel.Error))
{
Logger.LogError(ex, "Raise event produces errors, state Id = {0}, version ={1},event type = {2},event = {3}", GrainId.ToString(), Snapshot.Base.Version, @event.GetType().FullName, Serializer.SerializeToString(@event));
}
await RecoverySnapshot();//还原状态
throw;
}
return(false);
}