Question

我想在grain方法Eg中实现对grain客户端的回调。在评估Grain.Method1时，需要调用客户端方法来获取一些数据。

我已尝试使用流，但是当我在客户端上订阅流时，该方法不会触发。

谷物：

var config = ClusterConfiguration.LocalhostPrimarySilo();
config.AddMemoryStorageProvider();
config.Globals.RegisterStorageProvider<MemoryStorage>("PubSubStore");
config.Globals.RegisterStreamProvider<SimpleMessageStreamProvider>("MySMSProvider");
...
public override async Task OnActivateAsync() {
var streamProvider  = GetStreamProvider("MySMSProvider");
var stream = streamProvider.GetStream<MyTypeMessage>(myGuid, "MyStream");

RegisterTimer(s => {
   return stream.OnNextAsync(new MyTypeMessage());
}, null, TimeSpan.FromMilliseconds(1000), TimeSpan.FromMilliseconds(1000));
...

客户：

var clientConfiguration = ClientConfiguration.LocalhostSilo();
clientConfiguration.RegisterStreamProvider<SimpleMessageStreamProvider>("MySMSProvider");
GrainClient.Initialize(clientConfiguration);
...
var streamProvider = GrainClient.GetStreamProvider("MySMSProvider");
var stream = requestStreamProvider.GetStream<MyTypeMessage>(myGuid, "MyStream");
await stream.SubscribeAsync(
            async (message, token) => { process message that does not fire });

Answer 1

您似乎没有保留对订阅

返回的


var subscriptionHandle = await _factCalculationRequestStream
    .SubscribeAsync(async (message, token) => { process message that does not fire });

的引用

尝试这样的事情： subscriptionHandle 并保持IGrainObserver不被垃圾收集

在我的情况下，我最终在我的课程上实现public class MySocketService: WebSocketBehavior, IGrainObserver, IDisposable { private StreamSubscriptionHandle<MyStreamEvent> ... //inside some method invoked externally _streamSubscriberHandle = await requestedStream .SubscribeAsync(onStreamMessage, onStreamError, onStreamComplete); }（这是WebAPI项目中的websocketBehaviour，这个订阅效果很好：

split

奥尔良粮食客户与粮食之间的双向沟通

1 个答案: