c# – 保持连接用户的跟踪数量为WCF服务?

我有一个net tcp PerSession WCF服务,我目前跟踪连接用户数(活动客户端)的逻辑是使用服务构造函数和心跳机制.

在构造函数中,我只增加一个静态成员,并在将心跳发送到客户端期间,如果其中一个异常引发(TimeoutException,FaultException,CommunicationObjectAbortedException),我减少数量.

我也使用心跳发送其他东西.
直到现在它完美无缺,但还有更好的方法吗?

最佳答案 您可以创建
IInstanceContextInitializer的实现,一旦创建新的InstanceContext,将通知该实现.

 public class MyInstanceContextInitializer : IInstanceContextInitializer
  {
    public void Initialize(InstanceContext instanceContext, Message message)
    {
      // hook up to events to get notified about changes in the state of this instance context.
      // remember refernce to it
    }
  }

并附上它

  public class InstanceInitializerBehavior : IEndpointBehavior
  {

    public void AddBindingParameters(ServiceEndpoint serviceEndpoint, BindingParameterCollection bindingParameters)
    {    }

    //Apply the custom IInstanceContextProvider to the EndpointDispatcher.DispatchRuntime
    public void ApplyDispatchBehavior(ServiceEndpoint serviceEndpoint, EndpointDispatcher endpointDispatcher)
    {
      MyInstanceContextInitializer extension = new MyInstanceContextInitializer();
      endpointDispatcher.DispatchRuntime.InstanceContextInitializers.Add(extension);
    }

    public void ApplyClientBehavior(ServiceEndpoint serviceEndpoint, ClientRuntime behavior)
    {    }

    public void Validate(ServiceEndpoint endpoint)
    {    }
  }

一旦访问了InstanceContext,就可以使用IncomingChannels属性来获取传入服务实例的会话通道.

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