阶段性批量提交

SHH.CameraDashboard/Invokes/CommandServer.cs

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+using NetMQ;
+using NetMQ.Sockets;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SHH.CameraDashboard.Services;
+
+/// <summary>
+/// [Dashboard端] 指令控制服务
+/// 职责：双向通信通道。接收 Service 心跳/响应，向 Service 发送控制指令。
+/// 核心模式：ROUTER (Dashboard) <--> DEALER (Service)
+/// </summary>
+public class CommandServer : IDisposable
+{
+    // 单例模式
+    public static CommandServer Instance { get; } = new CommandServer();
+
+    // 事件：收到消息时触发 (ServiceId, MessageContent)
+    public event Action<string, string>? OnMessageReceived;
+
+    private RouterSocket? _routerSocket;
+    private NetMQPoller? _poller;
+
+    // 【关键新增】发送队列：用于解决跨线程发送的安全问题
+    // UI线程 -> Enqueue -> Poller线程 -> Socket.Send
+    private NetMQQueue<CommandPacket>? _sendQueue;
+
+    public int ListenPort { get; private set; }
+    public bool IsRunning => _poller != null && _poller.IsRunning;
+
+    // 在线设备表 (可选，用于记录谁在线)
+    // Key: ServiceId (Identity字符串)
+    private readonly ConcurrentDictionary<string, DateTime> _onlineClients = new();
+
+    private CommandServer() { }
+
+    public void Start(int port)
+    {
+        ListenPort = port;
+        if (IsRunning) return;
+
+        try
+        {
+            // 1. 初始化 Router Socket
+            _routerSocket = new RouterSocket();
+            _routerSocket.Bind($"tcp://*:{ListenPort}");
+            _routerSocket.ReceiveReady += OnSocketReady;
+
+            // 2. 初始化发送队列
+            _sendQueue = new NetMQQueue<CommandPacket>();
+            _sendQueue.ReceiveReady += OnQueueReady;
+
+            // 3. 启动 Poller (同时监听 Socket 接收 和 队列发送)
+            _poller = new NetMQPoller { _routerSocket, _sendQueue };
+
+            // RunAsync 会自动开启后台线程
+            _poller.RunAsync();
+
+            Console.WriteLine($"[Dashboard] 指令服务启动，监听: tcp://*:{ListenPort}");
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"[Dashboard] 指令端口绑定失败: {ex.Message}");
+            throw; // 必须抛出，让 App 感知
+        }
+    }
+
+    /// <summary>
+    /// 处理来自 Service 的网络消息 (运行在 Poller 线程)
+    /// </summary>
+    private void OnSocketReady(object? sender, NetMQSocketEventArgs e)
+    {
+        try
+        {
+            // 1. 读取身份帧 (Identity)
+            // 只要 Service 端 DealerSocket 设置了 Identity，这里收到就是那个 ID
+            var identityBytes = e.Socket.ReceiveFrameBytes();
+            string serviceId = Encoding.UTF8.GetString(identityBytes);
+
+            // 2. 读取内容帧 (假设 Dealer 直接发内容，中间无空帧)
+            // 如果你使用了 REQ/REP 模式，中间可能会有空帧，需注意兼容
+            string message = e.Socket.ReceiveFrameString();
+
+            // 3. 简单的心跳保活逻辑
+            _onlineClients[serviceId] = DateTime.Now;
+
+            // 4. 触发业务事件
+            // 注意：这依然在 Poller 线程，UI 处理时需 Invoke
+            Console.WriteLine($"[指令] From {serviceId}: {message}");
+            OnMessageReceived?.Invoke(serviceId, message);
+        }
+        catch (Exception ex)
+        {
+            Debug.WriteLine($"[Command Receive Error] {ex.Message}");
+        }
+    }
+
+    /// <summary>
+    /// 处理发送队列 (运行在 Poller 线程)
+    /// </summary>
+    private void OnQueueReady(object? sender, NetMQQueueEventArgs<CommandPacket> e)
+    {
+        try
+        {
+            if (_routerSocket == null) return;
+
+            // 从队列取出一个包
+            if (e.Queue.TryDequeue(out var packet, TimeSpan.Zero))
+            {
+                // Router 发送标准三步走：
+                // 1. 发送目标 Identity (More = true)
+                // 2. 发送空帧 (可选，取决于协议约定，Router-Dealer 直连通常不需要空帧)
+                // 3. 发送数据 (More = false)
+
+                // 这里我们采用最简协议：[Identity][Data]
+                _routerSocket.SendMoreFrame(packet.TargetId)
+                             .SendFrame(packet.JsonData);
+
+                Console.WriteLine($"[指令] To {packet.TargetId}: {packet.JsonData}");
+            }
+        }
+        catch (Exception ex)
+        {
+            Debug.WriteLine($"[Command Send Error] {ex.Message}");
+        }
+    }
+
+    /// <summary>
+    /// 发送指令 (线程安全，可由 UI 线程调用)
+    /// </summary>
+    public void SendCommand(string targetServiceId, object commandData)
+    {
+        if (_sendQueue == null) return;
+
+        var json = JsonConvert.SerializeObject(commandData);
+
+        // ★★★ 核心修复：不直接操作 Socket，而是入队 ★★★
+        _sendQueue.Enqueue(new CommandPacket
+        {
+            TargetId = targetServiceId,
+            JsonData = json
+        });
+    }
+
+    public void Dispose()
+    {
+        _poller?.Stop();
+        _poller?.Dispose();
+        _routerSocket?.Dispose();
+        _sendQueue?.Dispose();
+
+        _poller = null;
+        _routerSocket = null;
+        _sendQueue = null;
+    }
+
+    // 内部数据包结构
+    private class CommandPacket
+    {
+        public string TargetId { get; set; } = "";
+        public string JsonData { get; set; } = "";
+    }
+}