c# - 订阅类别流，事件永远不会出现在订阅客户端

Question

成为 GetEventStore 的首次用户阅读文档后，我遇到了一个问题，即事件从未出现在我的订阅客户端上。

这是可能的，因为我错过了一个配置步骤。

拥有这个控制台应用程序客户端:

public class EventStoreSubscriptionClient : ISubscriptionClient
{
    private const string GroupName = "liner";
    private const string StreamName = "$ce-happening";

    private readonly IProvideEventStoreConnection _eventStoreConnection;
    private readonly UserCredentials _userCredentials;

    private EventStorePersistentSubscriptionBase EventStorePersistentSubscriptionBase { get; set; }

    public EventStoreSubscriptionClient(IProvideEventStoreConnection eventStoreConnection, UserCredentials userCredentials)
    {
        _eventStoreConnection = eventStoreConnection;
        _userCredentials = userCredentials;
    }

    public void Connect()
    {
        var connection = _eventStoreConnection.ConnectAsync().Result;
        EventStorePersistentSubscriptionBase = connection.ConnectToPersistentSubscription(
               StreamName,
               GroupName,
               EventAppeared,
               SubscriptionDropped,
               _userCredentials,
               10,
               false
        );
    }

    private void SubscriptionDropped(EventStorePersistentSubscriptionBase subscription, SubscriptionDropReason reason, Exception ex)
    {
        Connect();
    }

    private async void EventAppeared(EventStorePersistentSubscriptionBase subscription, ResolvedEvent resolvedEvent)
    {
        Console.WriteLine("Event appeared: " + resolvedEvent.Event.EventId);
    }

    public void Dispose()
    {
        EventStorePersistentSubscriptionBase.Stop(TimeSpan.FromSeconds(15));
    }
}

启动此控制台应用程序后，连接正常 http://myserver:1113 .在我的事件存储的管理面板中，我可以看到在竞争消费者选项卡上有一个到这个流/组的连接:

但是如果我发送一个类似 happening-<guid> 的事件它显示在流浏览器上，但我的订阅客户端从未获得 event appeared事件:

我是否误解了订阅、流和群组的运作方式？请赐教。

Answer 1

这里的答案是 Event Store 的预测被禁用。

使用 --run-projections=all 启动商店