91 lines
3.1 KiB
C#
91 lines
3.1 KiB
C#
// 文件: Core\CmdClients\CommandDispatcher.cs
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using MessagePack;
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using Newtonsoft.Json.Linq;
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using SHH.Contracts;
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using System.Text;
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namespace SHH.CameraService;
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public class CommandDispatcher
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{
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// 1. 注入路由表
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private readonly Dictionary<string, ICommandHandler> _handlers;
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// 2. 定义回执事件 (ACK闭环的核心)
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public event Action<CommandResult>? OnResponseReady;
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// 3. 构造函数：注入所有 Handler
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public CommandDispatcher(IEnumerable<ICommandHandler> handlers)
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{
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// 将注入的 Handler 转换为字典，Key = ActionName (e.g. "SyncCamera")
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_handlers = handlers.ToDictionary(h => h.ActionName, h => h, StringComparer.OrdinalIgnoreCase);
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}
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public async Task DispatchAsync(string protocol, byte[] data)
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{
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try
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{
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// 只处理 COMMAND 协议
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if (protocol != ProtocolHeaders.Command) return;
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// 反序列化信封
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var envelope = MessagePackSerializer.Deserialize<CommandPayload>(data);
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if (envelope == null) return;
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string cmdCode = envelope.CmdCode; // e.g. "SyncCamera"
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Console.WriteLine($"[分发] 收到指令: {cmdCode} (ID: {envelope.RequestId})");
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bool isSuccess = true;
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string message = "OK";
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// --- 路由匹配逻辑 ---
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if (_handlers.TryGetValue(cmdCode, out var handler))
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{
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try
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{
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// 数据适配：你的 Handler 需要 JToken
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// 如果 envelope.JsonParams 是空的，传个空对象防止报错
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var jsonStr = string.IsNullOrEmpty(envelope.JsonParams) ? "{}" : envelope.JsonParams;
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var token = JToken.Parse(jsonStr);
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// ★★★ 核心：调用 SyncCameraHandler.ExecuteAsync ★★★
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await handler.ExecuteAsync(token);
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message = $"Executed {cmdCode}";
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}
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catch (Exception ex)
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{
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isSuccess = false;
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message = $"Handler Error: {ex.Message}";
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Console.WriteLine($"[业务异常] {message}");
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}
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}
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else
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{
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isSuccess = false;
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message = $"No handler found for {cmdCode}";
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Console.WriteLine($"[警告] {message}");
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}
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// --- ACK 闭环逻辑 ---
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if (envelope.RequireAck)
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{
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var result = new CommandResult
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{
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Protocol = ProtocolHeaders.CommandResult,
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RequestId = envelope.RequestId, // 必须带回 ID
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Success = isSuccess,
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Message = message,
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Timestamp = DateTime.Now.Ticks
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};
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// 触发事件
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OnResponseReady?.Invoke(result);
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine($"[Dispatcher] 致命错误: {ex.Message}");
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}
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}
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} |