Question

首次使用ZMQ，我试图设置一个处理许多getimage请求的进程。在我调试时会发生什么异常，我尝试修复并实现一种方法来阻止QueueDevice终止所有线程并优雅地退出。

receiver.Connect（BackendBindAddress）;抛出类型为＆＃39; NetMQ.InvalidException＆＃39;的未处理异常发生在NetMQ.dll中，错误代码为NetMQ.zmq.ErrorCode.EINVAL。为什么这个异常不会停止进一步执行线程？
我尝试将QueueDevice设置为静态字段并在关闭消息函数中使用queueDevice.stop（），但随后线程开始抛出TerminatingExceptions和neverexit。那么我可以关闭所有线程和主线程吗？

测试驾驶代码

    [TestMethod]
    public void ProgramStartupShutdownTest()
    {
        var mockClientWrapper = new Mock<IClient>(MockBehavior.Strict);

        var target = new SocketListener(2, mockClientWrapper.Object);

        var task = Task.Factory.StartNew(() => target.StartListening("tcp://localhost:81"));
        using (var client = NetMQContext.Create())
        {
           var socket = client.CreateRequestSocket();
           socket.Connect("tcp://localhost:81");
           var m = new NetMQMessage(new ShutdownMessage().CreateMessageFrames());
           socket.SendMessage(m);
        }

        var timedout = task.Wait(200);
        Assert.IsTrue(timedout);
    }

代码I正在使用

private const string BackendBindAddress = "inproc://workers";
public SocketListener(int numberOfWorkers, IClient client )
    {
        numberOfThreads = numberOfWorkers;
        _client = client;
    }

public void StartListening(string address)
    {
        StartZeroMQ(address, context =>
        {
            for (var i = 0; i <= numberOfThreads; i++)
            {
                var t = new Thread(WorkerRoutine);
                t.Start(
                        new WorkerParamters
                        {
                            Context = context,
                            Client = _client
                        }
                    );
            }
        });
    }


    private void StartZeroMQ(string address, Action<NetMQContext> setupWorkers)
    {
        using (var context = NetMQContext.Create())
        {
            var queueDevice = new QueueDevice(context, address, BackendBindAddress, DeviceMode.Blocking);
            setupWorkers(context);
            queueDevice.Start();
        }
    }

    struct WorkerParamters
    {
        public NetMQContext Context;
        public IClient Client;
    }

    private static void WorkerRoutine(object startparameter)
    {
            var wp = (WorkerParamters) startparameter;
            var client = wp.Client;
            using (var receiver = wp.Context.CreateResponseSocket())
            {
                receiver.Connect(BackendBindAddress);
                var running = true;
                while (running)
                {
                        var message = receiver.ReceiveMessage();
                        var letter = Message.ParseMessageFrame(message,
                                                               imageMessage => GetImage(imageMessage, client),
                                                               videoMessage => GetVideo(videoMessage, client),
                                                               shutdownMessage =>
                                                               {
                                                                   running = false;
                                                                   return true;
                                                               });

                        receiver.Send(letter.ToJson(), Encoding.Unicode);
                }
            }
    }

Answer 1

为了克服这个问题，我在设备中添加了Initialize方法，在启动worker之前调用它，并在调用worker启动设备之后调用它。

您可以从here获取代码（您需要从存储库中编译项目），稍后我会添加一个拉取请求。

你也可以手工编写设备逻辑，它不应该复杂。

如何从c＃中的工作线程关闭ZMQ QueueDevice

1 个答案: