使用 Hangfire 作为 Windows 服务正常关闭

Question

我有一个 Hangfire 工作人员设置为 Windows 服务，我试图确保它正常关闭（即在关闭之前完成现有工作）。 我查看了现有的 Stack Overflow 问题和 Hangfire 文档，它似乎没有关于如何将 Hangfire 设置为 .NET 5 的 Windows 服务的文档。这是我现有的代码：

Host.CreateDefaultBuilder(args)
    .ConfigureAppConfiguration(builder => builder.AddJsonFile("appsettings.json", optional: false))
    .ConfigureServices((hostContext, services) =>
    {
        // Register services with container

        services.AddHangfire(configuration => configuration
            .SetDataCompatibilityLevel(CompatibilityLevel.Version_170)
            .UseSimpleAssemblyNameTypeSerializer()
            .UseRecommendedSerializerSettings()
            .UseSqlServerStorage(hostContext.Configuration.GetConnectionString("Hangfire"), new SqlServerStorageOptions
            {
                CommandBatchMaxTimeout = TimeSpan.FromMinutes(5),
                SlidingInvisibilityTimeout = TimeSpan.FromMinutes(5),
                QueuePollInterval = TimeSpan.Zero,
                UseRecommendedIsolationLevel = true,
                DisableGlobalLocks = true
            }));

        services.AddHangfireServer(config =>
        {
            config.Queues = new[] { "myqueue" };
        });
    })
.UseNLog()
.UseWindowsService();

Answer 1

最近我遇到了关于 Hangfire 正常关机的类似问题。 使用优雅关闭的官方方法是在队列和工作人员中使用Cancellation Token 。

如果这不起作用，您可以在关闭时重新安排所有作业以延长关闭时间：

 public void Configure([...], IHostApplicationLifetime applicationLifetime)
 {
     .
     .
     .
     appLifetime.ApplicationStopping.Register(OnShutdownAsync);
 }

    private async void OnShutdownAsync()
    {
        Task task1 = Task.Factory.StartNew(() =>
        {
            var monitoring = JobStorage.Current.GetMonitoringApi();
            Console.WriteLine(monitoring.ProcessingCount());
            for (var i = 0; i < monitoring.ProcessingCount(); i++)
            {
                foreach (var processingJob in monitoring.ProcessingJobs(1000 * i, 1000))
                {
                    BackgroundJob.Requeue(processingJob.Key);
                }
            }
    
            Console.WriteLine(monitoring.ProcessingCount());
        });
    Task task2 = Task.Factory.StartNew(() => Thread.Sleep(TimeSpan.FromSeconds(45)));
    
    Task.WaitAny(task1, task2);
    Console.WriteLine("All threads complete");
    }