Quartz.NET开源作业调度框架系列(四):Plugin Job

　　如果在Quartz.NET作业运行时我们想动态修改Job和Trigger的绑定关系,同时修改一些参数那么该怎么办呢?Quartz.NET提供了插件技术,可以通过在XML文件中对Job和Trigger的参数进行配置,然后定期去加载配置文件来实例化任务和Trigger,这样就解决了此类问题.

1 PlugInJobExample

using System;
using System.Collections.Specialized;
using System.Threading;
using Common.Logging;
using Quartz;
using Quartz.Impl;
using Quartz.Job;
using System.Windows.Forms;
 
namespace QuartzDemo
{
    public class PlugInJobExample
    {
        public string Name
        {
            get { return GetType().Name; }
        }
 
        public virtual IScheduler Run()
        {
 
            var properties = new NameValueCollection();
            properties["quartz.plugin.triggHistory.type"] = "Quartz.Plugin.History.LoggingJobHistoryPlugin";
            properties["quartz.plugin.jobInitializer.type"] = "Quartz.Plugin.Xml.XMLSchedulingDataProcessorPlugin";
            //配置文件名称
            properties["quartz.plugin.jobInitializer.fileNames"] = "quartz_jobs.xml";
            properties["quartz.plugin.jobInitializer.failOnFileNotFound"] = "true";
            //每隔120秒进行探查,看配置文件是否更改
            properties["quartz.plugin.jobInitializer.scanInterval"] = "";
 
            // 用插件XML定义的propertie来实例化一个ISchedulerFactory
            ISchedulerFactory sf = new StdSchedulerFactory(properties);
            IScheduler sched = sf.GetScheduler();
 
            //启动
            sched.Start();
            //返回
            return sched;
 
        }
    }
}

2 SimpleJob1

 using System;
 using System.Collections.Generic;
 
 using Common.Logging;
 using Quartz;
 using Quartz.Impl;
 using Quartz.Job;
 using System.Windows.Forms;
 namespace QuartzDemo
 {
 
     public class SimpleJob1 : IJob
     {
 
         public virtual void Execute(IJobExecutionContext context)
         {
             JobKey jobKey = context.JobDetail.Key;
             if (isOpen("FrmConsole"))
             {
                 try
                 {
                     //获取当前Form1实例
                     __instance = (FrmConsole)Application.OpenForms["FrmConsole"];
                     //获取当前执行的线程ID
                     __instance.SetInfo(" - "+jobKey + "Thread ID " + System.Threading.Thread.CurrentThread.ManagedThreadId.ToString());
 
                     //通过方法更新消息
                     __instance.SetInfo(string.Format(" - {0} exec at {1}",
                     jobKey,
                     System.DateTime.Now.ToString()));
 
                 }
                 catch (Exception ex)
                 {
                     Console.WriteLine(ex.Message);
                 }
             }
             // This job simply prints out its job name and the
 
             if (context.MergedJobDataMap.Count > )
             {
                 ICollection<string> keys = context.MergedJobDataMap.Keys;
                 foreach (string key in keys)
                 {
                     String val = context.MergedJobDataMap.GetString(key);
                     __instance.SetInfo(string.Format(" - MergedJobDataMap entry: {0} = {1}", key, val));
 
                 }
             }
             context.Result = "exec ok";
         }
 
         private static FrmConsole __instance = null;
 
         /// <summary>
         /// 判断窗体是否打开
         /// </summary>
         /// <param name="appName"></param>
         /// <returns></returns>
         private bool isOpen(string appName)
         {
             FormCollection collection = Application.OpenForms;
             foreach (Form form in collection)
             {
                 if (form.Name == appName)
                 {
                     return true;
                 }
             }
             return false;
         }
     }
 }

3 xml配置文件

下面第一个是简单的Trigger配置,第二个是用CronTrigger:

 <?xml version="1.0" encoding="UTF-8"?>
 
 <job-scheduling-data xmlns="http://quartznet.sourceforge.net/JobSchedulingData"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  version="2.0">
 
   <processing-directives>
     <overwrite-existing-data>true</overwrite-existing-data>
   </processing-directives>
 
   <schedule>
 
     <job>
       <name>jobName1</name>
       <group>jobGroup1</group>
       <description>jobDesciption1</description>
       <job-type>QuartzDemo.SimpleJob1, QuartzDemo</job-type>
       <durable>true</durable>
       <recover>false</recover>
       <job-data-map>
         <entry>
           <key>key0</key>
           <value>value0</value>
         </entry>
         <entry>
           <key>key1</key>
           <value>value1</value>
         </entry>
         <entry>
           <key>key2</key>
           <value>value2</value>
         </entry>
       </job-data-map>
     </job>
 
     <trigger>
       <simple>
         <name>simpleName</name>
         <group>simpleGroup</group>
         <description>SimpleTriggerDescription</description>
         <job-name>jobName1</job-name>
         <job-group>jobGroup1</job-group>
         <start-time>2015-12-02T10:15:00.0Z</start-time>
         <end-time>2020-05-04T18:13:51.0Z</end-time>
         <misfire-instruction>SmartPolicy</misfire-instruction>
         <repeat-count>100</repeat-count>
         <repeat-interval>1000</repeat-interval>
       </simple>
     </trigger>
 
   </schedule>
 
 </job-scheduling-data>

 <?xml version="1.0" encoding="UTF-8"?>
 
 <job-scheduling-data xmlns="http://quartznet.sourceforge.net/JobSchedulingData"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  version="2.0">
 
   <processing-directives>
     <overwrite-existing-data>true</overwrite-existing-data>
   </processing-directives>
   <schedule>
     <job>
       <name>SimpleJob1</name>
       <group>myJobGroup1</group>
       <description>SimpleJob1</description>
       <job-type>QuartzDemo.SimpleJob1, QuartzDemo</job-type>
       <durable>true</durable>
       <recover>false</recover>
       <job-data-map>
         <entry>
           <key>author</key>
           <value>jackwangcumt</value>
         </entry>
           <entry>
           <key>blog</key>
           <value>isaboy</value>
         </entry>
         <entry>
           <key>jobType</key>
           <value>XML Plugin Job</value>
         </entry>
       </job-data-map>
     </job>
     <trigger>
       <cron>
         <name>trigger1</name>
         <group>myTriggerGroup</group>
         <job-name>SimpleJob1</job-name>
         <job-group>myJobGroup1</job-group>
         <cron-expression>0/2 * * * * ?</cron-expression>
       </cron>
     </trigger>
   </schedule>
 </job-scheduling-data>

4 效果

(可以将下图在另一个页签打开,看无压缩GIF图片)