任务调用及远端管理（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

using Common.Logging;
using Quartz;
namespace Job.Items
{
public class HelloJob : IJob
{
public const string Message = "msg";
private static readonly ILog log = LogManager.GetLogger(typeof(HelloJob));
public virtual void Execute(IJobExecutionContext context)
{
var jobKey = context.JobDetail.Key;
var message = context.JobDetail.JobDataMap.GetString(Message);
log.InfoFormat("HelloJob: msg: {0}", message);
}
}
}

HelloJobExample.cs，每5秒执行一次

public class HelloJobExample
{
public virtual void Run()
{
ISchedulerFactory sf = new StdSchedulerFactory();
IScheduler sched = sf.GetScheduler();
IJobDetail job = JobBuilder.Create HelloJob ()
.WithIdentity("job1", "group1")
.Build();
JobDataMap map = job.JobDataMap;
map.Put("msg", "Your remotely added job has executed!");
ITrigger trigger = TriggerBuilder.Create()
.WithIdentity("trigger1", "group1")
.ForJob(job.Key)
.WithCronSchedule("/5 * * ? * *")
.Build();
sched.ScheduleJob(job, trigger);
sched.Start();
}
}

好了，有效代码就那么多，我们来试试

class Program
{
static void Main(string[] args)
{
var example = new HelloJobExample();
example.Run();
Console.ReadKey();
}
}

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

public class RemoteServer : ILjrJob
{
public string Name
{
get { return GetType().Name; }
public virtual void Run()
{
ILog log = LogManager.GetLogger(typeof(RemoteServer));
NameValueCollection properties = new NameValueCollection();
properties["quartz.scheduler.instanceName"] = "RemoteServer";
properties["quartz.threadPool.type"] = "Quartz.Simpl.SimpleThreadPool, Quartz";
properties["quartz.threadPool.threadCount"] = "";
properties["quartz.threadPool.threadPriority"] = "Normal";
properties["quartz.scheduler.exporter.type"] = "Quartz.Simpl.RemotingSchedulerExporter, Quartz";
properties["quartz.scheduler.exporter.port"] = "";
properties["quartz.scheduler.exporter.bindName"] = "QuartzScheduler";
properties["quartz.scheduler.exporter.channelType"] = "tcp";
properties["quartz.scheduler.exporter.channelName"] = "httpQuartz";
properties["quartz.scheduler.exporter.rejectRemoteRequests"] = "true";
}
}

2.3、新建控制器HelloJobController

public class HelloJobController : Controller
{
public ActionResult Index()
{
try
{
if (HelloJobHelper.Trigger != null)
{
ViewBag.JobKey = "remotelyAddedJob";
ViewBag.State = HelloJobHelper.Scheduler.GetTriggerState(HelloJobHelper.Trigger.Key);
ViewBag.StartTime = HelloJobHelper.Trigger.StartTimeUtc.ToString();
}
else
{
ViewBag.State = "获取Job执行状态失败";
}
}
catch (Exception ex)
{
ViewBag.State = "Job服务器连接失败";
return View();
}
public ActionResult Run()
{
HelloJobHelper.RunJob();
return RedirectToAction("Index", "HelloJob");
}
public ActionResult Pause()
{
HelloJobHelper.PauseJob();
return RedirectToAction("Index", "HelloJob");
}
public ActionResult Resume()
{
HelloJobHelper.ResumeJob();
return RedirectToAction("Index", "HelloJob");
}
}

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

public static void RunJob()
{
if (!scheduler.CheckExists(jobKey))
{
IJobDetail job = JobBuilder.Create HelloJob ()
.WithIdentity(jobKey)
.Build();
JobDataMap map = job.JobDataMap;
map.Put("msg", "Your remotely added job has executed!");
ITrigger trigger = TriggerBuilder.Create()
.WithIdentity(triggerKey)
.ForJob(job.Key)
.WithCronSchedule("/5 * * ? * *")
.Build();
scheduler.ScheduleJob(job, trigger);
JobDetail = job;
Trigger = trigger;
}
}

暂停比较简单

public static void PauseJob()
{
scheduler.PauseJob(jobKey);
}

2.5、View

@{
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_Bootstrap.cshtml";
!DOCTYPE html
html
head
meta name="viewport" cOntent=" /
title Index /title
style
.col-sm-offset-2 {
margin-left:20px;
}
/style
/head
body
br /
@using (Html.BeginForm("Run", "HelloJob", null, FormMethod.Post, new { @id = "form1", @class = "form-horizontal", role = "form" }))
{
@Html.AntiForgeryToken()
div
div
input type="hidden" name="Id" id="Id" /
button type="submit" Run /button
/div
/div
@using (Html.BeginForm("Pause", "HelloJob", null, FormMethod.Post, new { @id = "form2", @class = "form-horizontal", role = "form" }))
{
@Html.AntiForgeryToken()
div
div
input type="hidden" name="Id" id="Id" /
button type="submit" Pause /button
/div
/div
@using (Html.BeginForm("Resume", "HelloJob", null, FormMethod.Post, new { @id = "form3", @class = "form-horizontal", role = "form" }))
{
@Html.AntiForgeryToken()
div
div
input type="hidden" name="Id" id="Id" /
button type="submit" Resume /button
/div
/div
br /
div
ul
li ViewBag.JobKey: @ViewBag.JobKey /li
li ViewBag.State: @ViewBag.State /li
li ViewBag.StartTime: @ViewBag.StartTime /li
li ViewBag.ExecuteTimes: @ViewBag.ExecuteTimes /li
/ul
/div
/body
/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