79 lines
2.3 KiB
C#
79 lines
2.3 KiB
C#
using System.Diagnostics;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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using SHH.CameraSdk;
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namespace SHH.CameraService;
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public class ParentProcessSentinel : BackgroundService
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{
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private readonly ServiceConfig _config;
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private readonly IHostApplicationLifetime _lifetime;
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private readonly ILogger<ParentProcessSentinel> _logger;
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public ParentProcessSentinel(
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ServiceConfig config,
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IHostApplicationLifetime lifetime,
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ILogger<ParentProcessSentinel> logger)
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{
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_config = config;
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_lifetime = lifetime;
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_logger = logger;
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}
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protected override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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int pid = _config.ParentPid;
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// 如果 PID 为 0 或负数，说明不需要守护（可能是手动启动调试）
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if (pid <= 0)
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{
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_logger.LogInformation("未指定有效的父进程 PID，守护模式已禁用。");
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return;
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}
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_logger.LogInformation($"父进程守护已启动，正在监控 PID: {pid}");
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while (!stoppingToken.IsCancellationRequested)
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{
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if (!IsParentRunning(pid))
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{
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_logger.LogWarning($"[ALERT] 检测到父进程 (PID:{pid}) 已退出！正在终止当前服务...");
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// 触发程序优雅退出
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_lifetime.StopApplication();
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// 强制跳出循环
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break;
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}
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// 每 2 秒检查一次，避免 CPU 浪费
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await Task.Delay(2000, stoppingToken);
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}
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}
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private bool IsParentRunning(int pid)
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{
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try
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{
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// 尝试获取进程对象
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var process = Process.GetProcessById(pid);
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// 检查是否已退出
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if (process.HasExited) return false;
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return true;
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}
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catch (ArgumentException)
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{
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// GetProcessById 在找不到 PID 时会抛出 ArgumentException
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// 说明进程已经不存在了
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return false;
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "检查父进程状态时发生未知错误，默认为存活");
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return true; // 发生未知错误时，保守起见认为它还活着
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}
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}
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} |