在MVC中使用webbackgrounder nuget可以长时间运行后台任务

Question

我需要在后台实现一项任务,那么我的任务是什么？我有一个存储每个客户租金金额的表,所以我需要在特定的datetimeackf 之后计算每个月的租金价格,所以我用谷歌搜索它,我发现了一段代码(它是nuget叫webbackgrounder)我把它添加到我的解决方案,它给了我这部分代码来处理我的任务:

using System;
using System.Threading;
using System.Threading.Tasks;

    namespace WebBackgrounder.DemoWeb
    {
        public class SampleJob : Job
        {
            public SampleJob(TimeSpan interval, TimeSpan timeout)
                : base("Sample Job", interval, timeout)
            {
            }

            public override Task Execute()
            {
                return new Task(() => Thread.Sleep(3000));
            }
        }
    }

我想知道如何编写我的任务？

更多细节:这里

我发现这篇文章,但实际上我不知道我可以长时间使用这种方法吗？最好的祝福 .

任何想法将不胜感激.

Answer 1

您还需要在应用程序的App_Start文件夹中添加一个类,该文件夹将启动作业并管理它的生命周期.你可以在这里看到一个例子...... https://github.com/NuGet/WebBackgrounder/tree/master/src/WebBackgrounder.DemoWeb

这是演示应用程序的代码

using System;
using Elmah;
using WebBackgrounder.Jobs;

[assembly: WebActivator.PostApplicationStartMethod(typeof(WebBackgrounder.DemoWeb.App_Start.WebBackgrounderSetup), "Start")]
[assembly: WebActivator.ApplicationShutdownMethod(typeof(WebBackgrounder.DemoWeb.App_Start.WebBackgrounderSetup), "Shutdown")]

namespace WebBackgrounder.DemoWeb.App_Start
{
    public static class WebBackgrounderSetup
    {
        static readonly JobManager _jobManager = CreateJobWorkersManager();

        public static void Start()
        {
            _jobManager.Start();
        }

        public static void Shutdown()
        {
            _jobManager.Dispose();
        }

        private static JobManager CreateJobWorkersManager()
        {
            var jobs = new IJob[]
            {
                new SampleJob(TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(20)),
                /* new ExceptionJob(TimeSpan.FromSeconds(15)), */
                new WorkItemCleanupJob(TimeSpan.FromMinutes(1), TimeSpan.FromMinutes(5), new WorkItemsContext())
            };

            var coordinator = new WebFarmJobCoordinator(new EntityWorkItemRepository(() => new WorkItemsContext()));
            var manager = new JobManager(jobs, coordinator);
            manager.Fail(ex => Elmah.ErrorLog.GetDefault(null).Log(new Error(ex)));
            return manager;
        }
    }
}

但是我发现使用Webbackgrounder的部分更简单,如下所示.将此类放在App_Start文件夹中

using System;
using BombaySapphireCds.Jobs;
using Elmah;

[assembly: WebActivator.PostApplicationStartMethod(typeof(BombaySapphireCds.App_Start.PodMonitorConfig), "Start")]
[assembly: WebActivator.ApplicationShutdownMethod(typeof(BombaySapphireCds.App_Start.PodMonitorConfig), "Shutdown")]

namespace BombaySapphireCds.App_Start
{
    public static class PodMonitorConfig
    {
        private static PodMonitorJob m_job;

        public static void Start()
        {
            m_job = new PodMonitorJob(TimeSpan.FromSeconds(20));
        }

        public static void Shutdown()
        {
            m_job.Dispose();
        }
    }
}

以及做实际工作的班级......(把它放在你喜欢的任何地方)

using System;
using System.Threading;
using System.Threading.Tasks;

namespace BombaySapphireCds.Jobs
{
    public class PodMonitorJob : IDisposable
    {
        private CancellationTokenSource m_cancel;
        private Task m_task;
        private TimeSpan m_interval;
        private bool m_running;

        public PodMonitorJob(TimeSpan interval)
        {
            m_interval = interval;
            m_running = true;
            m_cancel = new CancellationTokenSource();
            m_task = Task.Run(() => TaskLoop(), m_cancel.Token);
        }

        private void TaskLoop()
        {
            while (m_running)
            {
                //
                // Do monitoring work here.
                //

                Thread.Sleep(m_interval);
            }
        }

        public void Dispose()
        {
            m_running = false;

            if (m_cancel != null)
            {
                try
                {
                    m_cancel.Cancel();
                    m_cancel.Dispose();
                }
                catch
                {
                }
                finally
                {
                    m_cancel = null;
                }
            }
        }
    }
}