Question

有没有办法在hangfire中重复安排后台工作？我尝试过以下但只发射一次。

 using (var server = new BackgroundJobServer(options))
            {
                Console.WriteLine("Hangfire Server started. Press any key to exit...");
               // Console.ReadKey();
            }
            return null;

Answer 1

使用RecurringJob创建它。 Hangfire Recurring Tasks

RecurringJob.AddOrUpdate("some-id", () => Console.WriteLine(), Cron.Hourly);

Answer 2

如果您要进行定期计划工作或要在任何特定日期或月份中执行方法。对于Cron表达式，您需要遵循 this

例如：

DateTime date =
                DateTime.Parse(ScheduleTime, System.Globalization.CultureInfo.CurrentCulture)
                    .ToUniversalTime();
            var dateString = ScheduleTime.Minute + " " + ScheduleTime.Hour + " " + ScheduleTime.ScheduleDate + " * *";

            RecurringJob.AddOrUpdate<IClassController>(
                "RecurringName", s => s.Execute(MViewModel),
                dateString);


    public async Task<bool> Execute(MViewModel mViewModel)
    {
        try
        {
            if (mViewModel.ExpiryDate != null && mViewModel.ExpiryDate.Value < DateTime.Now)
            {
                RecurringJob.RemoveIfExists("RecurringName");
            }
            else
            {
                var url = WebConfigurationManager.AppSettings["apiPath"];
                string apiUrl = url + "api/VApi/CallAPi";

                using (HttpClient client = new HttpClient())
                {
                    client.BaseAddress = new Uri(apiUrl);
                    client.DefaultRequestHeaders.Accept.Clear();
                    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic",
                        "bW9iaWxlYXBw");
                    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

                    var serializedJson = JsonConvert.SerializeObject(mViewModel);

                    var response = await client.PostAsJsonAsync(apiUrl, serializedJson);
                }
            }
        }
        catch (Exception exception)
        {
            _logger.Log(LogType.Error, ExceptionType.Application, ToString(), exception);
            return false;
        }
        return true;
    }

Answer 3

你可以安排像这样的hangfire工作：

 Hangfire.BackgroundJob.Schedule<VerificationEmail>((j) => j.FollowUpVerficationEmail(Email), TimeSpan.FromHours(24));

此处VerificationEmail是包含FollowUpVerficationEmail方法的类，每24小时发送一次后续电子邮件。

Answer 4

您可以这样使用

RecurringJob.AddOrUpdate(/*(optional) job Id*/,() => /*do your stuff here */, /*Cron Expression*/);

1），您可以通过 HangFire的Cron 类选择cron表达式，如下所示

RecurringJob.AddOrUpdate("job1", () => Console.WriteLine("hey"), Cron.Hourly);

2），也可以通过here指定cron表达式，

RecurringJob.AddOrUpdate("job2", () => Console.WriteLine("hey"), "0/10 0 0 ? * * *");

您可以检查here了解更多详细信息。

Hangfire背景工作与日程安排

4 个答案: