254 lines
9.9 KiB
C#
254 lines
9.9 KiB
C#
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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namespace SHH.ProcessLaunchers
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{
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/// <summary>
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/// 进程管理器 (核心实现类)
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/// <para>核心职责：作为对外统一入口 (Facade)，维护所有受管进程的容器。</para>
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/// <para>主要功能：负责路由外部指令(启动/停止)到具体的进程实例，并处理事件分发。</para>
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/// </summary>
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public class ProcessManager : IProcessManager, IDisposable
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{
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#region --- 1. 字段与事件 (Fields & Events) ---
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/// <summary>
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/// 线程安全的进程容器
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/// <para>Key: ProcessConfig.Id (唯一标识)</para>
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/// <para>Value: ManagedProcess (受管实例)</para>
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/// </summary>
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private readonly ConcurrentDictionary<string, ManagedProcess> _processes
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= new ConcurrentDictionary<string, ManagedProcess>();
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/// <summary>
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/// 日志服务接口 (依赖注入)
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/// </summary>
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private readonly ILauncherLogger _logger;
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// ---------------------------------------------------------
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// 对外暴露的事件定义
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// ---------------------------------------------------------
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/// <summary>
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/// 对外事件：当接收到任意子进程的标准输出/错误流时触发
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/// </summary>
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public event EventHandler<ProcessOutputEventArgs> OnOutputReceived;
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/// <summary>
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/// 对外事件：当任意子进程的状态发生变更时触发
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/// </summary>
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public event EventHandler<ProcessStateEventArgs> OnStateChanged;
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#endregion
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#region --- 2. 构造与析构 (Constructor & Dispose) ---
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/// <summary>
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/// 初始化进程管理器实例
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/// </summary>
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/// <param name="logger">日志实现类 (若外部未传入，则内部自动使用 NullLogger 以防止空引用异常)</param>
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public ProcessManager(ILauncherLogger logger = null)
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{
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// 规范化：使用空合并运算符确保 _logger 永不为 null
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_logger = logger ?? new NullLogger();
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}
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/// <summary>
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/// 销毁资源，停止所有进程并清理事件订阅
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/// </summary>
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public void Dispose()
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{
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// 1. 停止所有子进程 (触发 Kill 操作，清理进程树)
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StopAll();
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// 2. 清空内部容器引用
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_processes.Clear();
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// 3. 移除所有外部事件订阅，防止 UI 端因未解绑而导致的内存泄露
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OnOutputReceived = null;
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OnStateChanged = null;
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}
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#endregion
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#region --- 3. 公共 API 实现 (Public Methods) ---
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/// <summary>
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/// 注册一个新的进程配置到管理器中
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/// </summary>
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/// <param name="config">进程配置对象 (包含 Exe路径、参数、熔断策略等)</param>
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/// <exception cref="ArgumentException">当 Id 为空时抛出</exception>
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/// <exception cref="InvalidOperationException">当 Id 已存在时抛出</exception>
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public void Register(ProcessConfig config)
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{
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// 1. 基础参数校验：确保 Id 存在
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if (string.IsNullOrWhiteSpace(config.Id))
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throw new ArgumentException("进程配置无效：必须包含唯一的 Id");
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// 2. 防重复注册校验：确保字典中没有相同的 Key
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if (_processes.ContainsKey(config.Id))
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throw new InvalidOperationException($"进程 Id '{config.Id}' 已存在，禁止重复注册。");
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// 3. 实例化受管进程对象 (传入 this 指针是为了后续回调 DispatchXXX 方法)
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var process = new ManagedProcess(config, this, _logger);
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// 4. 加入线程安全字典
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if (_processes.TryAdd(config.Id, process))
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{
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_logger.LogLifecycle(config.Id, LogAction.Output, LogTrigger.System,
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$"进程配置已注册: {config.DisplayName}");
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}
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}
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/// <summary>
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/// 启动指定 ID 的进程
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/// </summary>
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/// <param name="id">进程的唯一标识符 (ProcessConfig.Id)</param>
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public void Start(string id)
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{
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// 尝试获取指定 ID 的进程实例
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if (_processes.TryGetValue(id, out var p))
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{
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// 调用内部实例的启动逻辑，操作归因标记为"User" (用户手动)
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p.ExecuteStart(LogTrigger.User, "用户手动启动指令");
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}
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else
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{
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// 如果找不到，记录错误日志
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_logger.LogLifecycle(id, LogAction.Error, LogTrigger.User, "启动失败：未找到指定 ID 的进程配置");
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}
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}
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/// <summary>
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/// [异步] 有序批量启动所有进程
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/// <para>按照 StartupOrder 从小到大排序启动，并支持启动间隙延时 (PostStartupDelayMs)。</para>
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/// </summary>
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/// <returns>异步任务</returns>
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public async Task StartAllAsync()
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{
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_logger.LogLifecycle("ALL", LogAction.Start, LogTrigger.User, "执行有序批量启动");
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// 1. 数据准备：从字典取出所有进程，并按配置进行排序
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// 排序规则：StartupOrder (小->大) -> Id (字母序) 以保证启动顺序的确定性
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var sortedList = _processes.Values
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.OrderBy(p => p.Config.StartupOrder) // 按用户指定的权重排
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.ThenBy(p => p.Config.Id) // 权重一样时按 ID 排
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.ToList();
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// 2. 顺序执行启动循环
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foreach (var p in sortedList)
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{
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// 同步调用启动指令（注意：这里不等待进程完全 Ready，只负责拉起进程）
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p.ExecuteStart(LogTrigger.User, "有序批量启动");
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// 3. 处理启动间隙延迟 (错峰启动)
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// 作用：防止多个重型进程同时启动导致 CPU/IO 瞬间拥堵
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int delay = p.Config.PostStartupDelayMs;
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if (delay > 0)
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{
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// 异步等待指定毫秒数，释放线程控制权
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await Task.Delay(delay);
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}
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}
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_logger.LogLifecycle("ALL", LogAction.Start, LogTrigger.User, "有序批量启动完成");
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}
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/// <summary>
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/// 停止指定 ID 的进程
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/// </summary>
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/// <param name="id">进程的唯一标识符</param>
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public void Stop(string id)
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{
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if (_processes.TryGetValue(id, out var p))
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{
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p.ExecuteStop(LogTrigger.User, "用户手动停止指令");
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}
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}
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/// <summary>
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/// 批量停止所有进程 (并发执行)
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/// </summary>
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public void StopAll()
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{
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_logger.LogLifecycle("ALL", LogAction.Stop, LogTrigger.User, "执行批量停止");
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// 遍历所有进程，使用 Task.Run 并发执行停止，提高效率，无需等待
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foreach (var p in _processes.Values)
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{
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Task.Run(() => p.ExecuteStop(LogTrigger.User, "批量停止"));
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}
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}
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/// <summary>
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/// 重置/复位指定进程的资源报警状态
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/// <para>当用户在 UI 上点击"已处置"后调用此方法，解除报警锁定。</para>
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/// </summary>
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/// <param name="id">进程的唯一标识符</param>
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public void ResetGuard(string id)
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{
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if (_processes.TryGetValue(id, out var p))
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{
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// 调用内部复位逻辑，清除报警锁定状态
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p.ResetGuards();
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_logger.LogLifecycle(id, LogAction.ResourceCheck, LogTrigger.User, "用户手动复位资源报警锁");
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}
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}
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/// <summary>
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/// 获取当前所有进程的实时状态快照
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/// <para>用于 UI 列表的数据绑定或定时刷新。</para>
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/// </summary>
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/// <returns>进程信息快照列表</returns>
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public List<ProcessInfoSnapshot> GetSnapshot()
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{
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// 将字典中的所有受管对象转为 DTO 快照列表
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return _processes.Values.Select(p => p.GetSnapshot()).ToList();
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}
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#endregion
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#region --- 4. 内部事件分发 (Internal Dispatchers) ---
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// 说明：C# 的 event 只能在定义类内部 Invoke。
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// 为了让内部类 ManagedProcess 也能触发 Manager 的对外事件，我们提供了这几个 internal 方法。
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// 这些方法充当了内部类与外部事件之间的桥梁。
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/// <summary>
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/// 分发状态变更事件 (供 ManagedProcess 内部调用)
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/// </summary>
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/// <param name="processId">进程 ID</param>
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/// <param name="newState">新的状态</param>
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internal void DispatchStateChange(string processId, ProcessStatus newState)
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{
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// 线程安全地触发事件
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OnStateChanged?.Invoke(this, new ProcessStateEventArgs
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{
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ProcessId = processId,
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State = newState
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});
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}
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/// <summary>
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/// 分发日志输出事件 (供 ManagedProcess 内部调用)
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/// </summary>
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/// <param name="processId">进程 ID</param>
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/// <param name="content">日志内容</param>
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/// <param name="isError">是否为错误流</param>
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internal void DispatchOutput(string processId, string content, bool isError)
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{
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// 线程安全地触发事件
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OnOutputReceived?.Invoke(this, new ProcessOutputEventArgs
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{
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ProcessId = processId,
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Content = content,
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IsError = isError
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});
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}
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#endregion
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}
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}
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