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
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 }
HelloJobExample.cs，每5秒执行一次
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 }
好了，有效代码就那么多，我们来试试
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 }
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
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 }
2.3、新建控制器HelloJobController
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 }
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
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 }
暂停比较简单
1 public static void PauseJob()
2 {
3 scheduler.PauseJob(jobKey);
4 }
2.5、View
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>
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
时间： 2024-10-24 21:45:58