• 任务调度及远端管理(基于Quartz.net)


    这篇文章我们来了解一些项目中的一个很重要的功能:任务调度

    可能有些同学还不了解这个,其实简单点说任务调度与数据库中的Job是很相似的东西

    只不过是运行的物理位置与管理方式有点不一样,从功能上来说我觉得还是差不多的,

    存储过程有很大的局限性,耦合性也太高,所以最好把系统的一些Job放在代码层,

    于是就有了Quartz.net,我们本篇就是针对Quartz.net的二次开发

    一、新建HelloJob

    HelloJob.cs,示例Job,每次执行都输出msg变量中的信息

    复制代码
     1 using Common.Logging;
     2 using Quartz;
     3 
     4 namespace Job.Items
     5 {
     6     public class HelloJob : IJob
     7     {
     8         public const string Message = "msg";
     9         private static readonly ILog log = LogManager.GetLogger(typeof(HelloJob));
    10 
    11         public virtual void Execute(IJobExecutionContext context)
    12         {
    13             var jobKey = context.JobDetail.Key;
    14             var message = context.JobDetail.JobDataMap.GetString(Message);
    15             log.InfoFormat("HelloJob: msg: {0}", message);
    16         }
    17     }
    18 }
    复制代码

    HelloJobExample.cs,每5秒执行一次

    复制代码
     1         public class HelloJobExample 
     2         {
     3             public virtual void Run()
     4             {
     5                 ISchedulerFactory sf = new StdSchedulerFactory();
     6                 IScheduler sched = sf.GetScheduler();
     7 
     8                 IJobDetail job = JobBuilder.Create<HelloJob>()
     9                     .WithIdentity("job1", "group1")
    10                     .Build();
    11 
    12                 JobDataMap map = job.JobDataMap;
    13                 map.Put("msg", "Your remotely added job has executed!");
    14 
    15                 ITrigger trigger = TriggerBuilder.Create()
    16                     .WithIdentity("trigger1", "group1")
    17                     .ForJob(job.Key)
    18                     .WithCronSchedule("/5 * * ? * *")
    19                     .Build();
    20 
    21                 sched.ScheduleJob(job, trigger);
    22                 sched.Start();
    23             }
    24         }
    复制代码

    好了,有效代码就那么多,我们来试试

    复制代码
     1     class Program
     2     {
     3         static void Main(string[] args)
     4         {
     5             var example = new HelloJobExample();
     6             example.Run();
     7 
     8             Console.ReadKey();
     9         }
    10     }
    复制代码

    貌似没什么问题,如愿地执行了。

    但是我们想想,实际运行中执行任务的服务器一般都是独立出来的,那怎么去管理这些任务的开启、关闭及暂停呢?

    肯定不能每次手动去操作,那太麻烦了。我们的希望是在应用中(系统管理后台)去管理这些任务。万幸Quartz.net足够强大,

    他是支持远程操作的,没有太深入了解,不过看调用参数应该是通过TCP请求进行操作的,我们试试看

    二、Job远程管理

    2.1、新建Job.Items项目,把之前新建的HelloJob.cs放在其中

    2.2、新建Job.Server项目

    新建RemoteServer.cs

    复制代码
     1     public class RemoteServer : ILjrJob
     2     {
     3         public string Name
     4         {
     5             get { return GetType().Name; }
     6         }
     7 
     8         public virtual void Run()
     9         {
    10             ILog log = LogManager.GetLogger(typeof(RemoteServer));
    11 
    12             NameValueCollection properties = new NameValueCollection();
    13             properties["quartz.scheduler.instanceName"] = "RemoteServer";
    14             properties["quartz.threadPool.type"] = "Quartz.Simpl.SimpleThreadPool, Quartz";
    15             properties["quartz.threadPool.threadCount"] = "5";
    16             properties["quartz.threadPool.threadPriority"] = "Normal";
    17             properties["quartz.scheduler.exporter.type"] = "Quartz.Simpl.RemotingSchedulerExporter, Quartz";
    18             properties["quartz.scheduler.exporter.port"] = "555";
    19             properties["quartz.scheduler.exporter.bindName"] = "QuartzScheduler";
    20             properties["quartz.scheduler.exporter.channelType"] = "tcp";
    21             properties["quartz.scheduler.exporter.channelName"] = "httpQuartz";
    22             properties["quartz.scheduler.exporter.rejectRemoteRequests"] = "true";
    23 24         }
    25     }
    复制代码

    2.3、新建控制器HelloJobController

    复制代码
     1     public class HelloJobController : Controller
     2     {
     3         public ActionResult Index()
     4         {
     5             try
     6             {
     7                 if (HelloJobHelper.Trigger != null)
     8                 {
     9                     ViewBag.JobKey = "remotelyAddedJob";
    10                     ViewBag.State = HelloJobHelper.Scheduler.GetTriggerState(HelloJobHelper.Trigger.Key);
    11                     ViewBag.StartTime = HelloJobHelper.Trigger.StartTimeUtc.ToString();
    12                 }
    13                 else
    14                 {
    15                     ViewBag.State = "获取Job执行状态失败";
    16                 }
    17             }
    18             catch (Exception ex)
    19             {
    20                 ViewBag.State = "Job服务器连接失败";
    21             }
    22 
    23             return View();
    24         }
    25         public ActionResult Run()
    26         {
    27             HelloJobHelper.RunJob();
    28 
    29             return RedirectToAction("Index", "HelloJob");
    30         }
    31         public ActionResult Pause()
    32         {
    33             HelloJobHelper.PauseJob();
    34 
    35             return RedirectToAction("Index", "HelloJob");
    36         }
    37         public ActionResult Resume()
    38         {
    39             HelloJobHelper.ResumeJob();
    40             return RedirectToAction("Index", "HelloJob");
    41         }
    42     }
    复制代码

    2.4、新建HelloJobHelper

    先配置连接远端任务服务器的参数,这个要和上面的RemoteServer.cs对应

    1             properties["quartz.scheduler.proxy"] = "true";
    2             properties["quartz.scheduler.proxy.address"] = "tcp://127.0.0.1:555/QuartzScheduler";

    我们来看看开始操作,运行这个方法,任务服务器将自动开启这个Job

    复制代码
     1         public static void RunJob()
     2         {
     3             if (!scheduler.CheckExists(jobKey))
     4             {
     5                 IJobDetail job = JobBuilder.Create<HelloJob>()
     6                     .WithIdentity(jobKey)
     7                     .Build();
     8 
     9                 JobDataMap map = job.JobDataMap;
    10                 map.Put("msg", "Your remotely added job has executed!");
    11 
    12                 ITrigger trigger = TriggerBuilder.Create()
    13                     .WithIdentity(triggerKey)
    14                     .ForJob(job.Key)
    15                     .WithCronSchedule("/5 * * ? * *")
    16                     .Build();
    17 
    18                 scheduler.ScheduleJob(job, trigger);
    19 
    20                 JobDetail = job;
    21                 Trigger = trigger;
    22             }
    23         }
    复制代码

    暂停比较简单

    1         public static void PauseJob()
    2         {
    3             scheduler.PauseJob(jobKey);
    4         }

    2.5、View

    复制代码
     1 @{
     2     ViewBag.Title = "Index";
     3     Layout = "~/Views/Shared/_Bootstrap.cshtml";
     4 }
     5 
     6 <!DOCTYPE html>
     7 
     8 <html>
     9 <head>
    10     <meta name="viewport" content="width=device-width" />
    11     <title>Index</title>
    12     <style>
    13         .col-sm-offset-2 {
    14         margin-left:20px;
    15         }
    16     </style>
    17 </head>
    18 <body>
    19     <br />
    20     @using (Html.BeginForm("Run", "HelloJob", null, FormMethod.Post, new { @id = "form1", @class = "form-horizontal", role = "form" }))
    21     {
    22         @Html.AntiForgeryToken()
    23         <div class="form-group">
    24             <div class="col-sm-offset-2 col-sm-10">
    25                 <input type="hidden" name="Id" id="Id" />
    26                 <button type="submit" class="btn btn-default">Run</button>
    27             </div>
    28         </div>
    29     }
    30 
    31     @using (Html.BeginForm("Pause", "HelloJob", null, FormMethod.Post, new { @id = "form2", @class = "form-horizontal", role = "form" }))
    32     {
    33         @Html.AntiForgeryToken()
    34         <div class="form-group">
    35             <div class="col-sm-offset-2 col-sm-10">
    36                 <input type="hidden" name="Id" id="Id" />
    37                 <button type="submit" class="btn btn-default">Pause</button>
    38             </div>
    39         </div>
    40     }
    41 
    42     @using (Html.BeginForm("Resume", "HelloJob", null, FormMethod.Post, new { @id = "form3", @class = "form-horizontal", role = "form" }))
    43     {
    44         @Html.AntiForgeryToken()
    45         <div class="form-group">
    46             <div class="col-sm-offset-2 col-sm-10">
    47                 <input type="hidden" name="Id" id="Id" />
    48                 <button type="submit" class="btn btn-default">Resume</button>
    49             </div>
    50         </div>
    51     }
    52 
    53     <br />
    54     <div>
    55         <ul>
    56             <li>ViewBag.JobKey: @ViewBag.JobKey</li>
    57             <li>ViewBag.State: @ViewBag.State</li>
    58             <li>ViewBag.StartTime: @ViewBag.StartTime</li>
    59             <li>ViewBag.ExecuteTimes: @ViewBag.ExecuteTimes</li>
    60         </ul>
    61     </div>
    62 
    63 
    64 </body>
    65 </html>
    复制代码

    2.6 好了,我们先运行服务端,开起来就好了

    2.7、运行Web

    2.7.1 点击Run

    2.7.2、点击Pause(暂停)

    2.7.3、点击Resume(恢复)

    2.8、最后看看项目代码层次,涉及3个:MVC、Job.Items、Job.Server

    好了,基本的功能有了。这篇就到这里

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  • 原文地址:https://www.cnblogs.com/MuNet/p/6688064.html
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