52 lines
1.8 KiB
C#
52 lines
1.8 KiB
C#
using Microsoft.Extensions.Hosting;
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using SHH.CameraSdk;
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public class CameraEngineWorker : BackgroundService
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{
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private readonly CameraManager _manager;
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public CameraEngineWorker(CameraManager manager)
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{
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// 理由：严谨性检查，防止因配置错误导致的空指针崩溃
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_manager = manager ?? throw new ArgumentNullException(nameof(manager));
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}
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protected override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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Console.WriteLine("[Engine] 正在启动核心引擎...");
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try
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{
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// 1. 理由：启动 SDK 内部加载流程（从本地存储恢复设备）
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await _manager.StartAsync();
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Console.WriteLine("[Engine] 设备管理服务已启动。");
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}
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catch (Exception ex)
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{
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Console.WriteLine($"[Engine] 严重启动异常: {ex.Message}");
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return; // 理由：核心组件失败，终止后续逻辑
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}
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// 2. 理由：Worker 必须保持活跃状态，以便作为宿主生命周期的一部分
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while (!stoppingToken.IsCancellationRequested)
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{
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// 你可以在这里定期输出一些状态统计
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// Console.WriteLine($"[Engine] 活跃设备数: {_manager.GetActiveCount()}");
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await Task.Delay(TimeSpan.FromSeconds(30), stoppingToken);
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}
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}
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public override async Task StopAsync(CancellationToken cancellationToken)
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{
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Console.WriteLine("[Engine] 正在执行优雅停机...");
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try
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{
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// 理由：这是重构的核心。必须在 SDK 退出前释放所有非托管句柄
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await _manager.DisposeAsync();
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}
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finally
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{
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await base.StopAsync(cancellationToken);
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}
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}
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} |