通过配置文件调度Quartz.NET，并构建Job工厂的实现方式

大家都知道Quartz.Net目前支持通过XML配置Job以及Trigger列表，但是可能还有很多同学对于Job的处理仍然需要写很多实现IJob接口的实现类，似乎显得不雅。
我们实际上可以通过Job Data Map，获取Job真正所需调用的Assembly以及Type。
我的示例XML如下：

 1<?xml version="1.0" encoding="utf-8" ?>
 2<quartz xmlns="http://quartznet.sourceforge.net/JobSchedulingData"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4                version="1.0"
 5                overwrite-existing-jobs="true">
 6  <!--Thread Demo job-->
 7  <job>
 8    <job-detail>
 9      <name>SimpleThreadJob</name>
10      <group>SimpleThreadGroup</group>
11      <job-type>MorningStar.Demo.NeverStop.AllServerJob, MorningStar.Demo.NeverStop</job-type>
12      <job-data-map>
13        <entry>
14          <key>execution assembly</key>
15          <value>MorningStar.Demo.ThreadSample</value>
16        </entry>
17        <entry>
18          <key>execution servicename</key>
19          <value>MorningStar.Demo.ThreadSample.ThreadSample</value>
20        </entry>
21      </job-data-map>
22    </job-detail>
23    <trigger>
24      <simple>
25        <name>SimpleThreadTrigger</name>
26        <group>TriggerGroup</group>
27        <job-name>SimpleThreadJob</job-name>
28        <job-group>SimpleThreadGroup</job-group>
29        <start-time>2007-12-09T18:08:50</start-time>
30        <!--Run only once-->
31        <repeat-count>0</repeat-count>
32        <!--repeat every 2 minutes-->
33        <repeat-interval>120000</repeat-interval>
34      </simple>
35    </trigger>
36  </job>
37</quartz>

大家都看出来了，MorningStar.Demo.NeverStop.AllServerJob是实现了IJOB的实现类，该类的实现如下：

 1/**//******************Service Scheduler Factory****************
 2 ******************Creater:Blade He*************************
 3 ******************Creater Date:2009-09-04******************
 4 */ 
 5using System;
 6using System.Collections.Generic;
 7using System.Linq;
 8using System.Text;
 9using Quartz;
10using Common.Logging;
11using System.Reflection;
12using FastReflectionLib;
13
14namespace MorningStar.Demo.NeverStop
15{
16    public class AllServerJob:IJob
17    {
18        private static ILog _log = LogManager.GetLogger(typeof(AllServerJob));
19        // parameter names specific to this job
20        public const string EXECUTION_SERVICENAME = "execution servicename";
21        public const string EXECUTION_ASSEMBLY = "execution assembly";
22
23        public AllServerJob() 
24        { 
25        }
26
27        IJob Members#region IJob Members
28        public void Execute(JobExecutionContext context)
29        {
30            
31            try
32            {
33                string jobName = context.JobDetail.FullName;
34                _log.Info(string.Format("---{0} executing at {1}", jobName, DateTime.Now.ToString("r")));
35                JobDataMap data = context.JobDetail.JobDataMap;
36
37                //Get Service Assembly And Service Type
38                string serviceAssemblyName = data.GetString(EXECUTION_ASSEMBLY);
39                string serviceTypeName = data.GetString(EXECUTION_SERVICENAME);
40                Assembly assembly = Assembly.Load(serviceAssemblyName);
41                Type type = assembly.GetType(serviceTypeName);
42                MethodInfo method = type.GetMethod("StartProcess");
43                Object obj = System.Activator.CreateInstance(type);
44
45                //Fast Invoke,Keep good performance
46                method.FastInvoke(obj, null);
47                _log.Info(string.Format("---{0} completed at {1}", jobName, DateTime.Now.ToString("r")));
48            }
49            catch (Exception ex)
50            {
51                SimpleTrigger trigger = ((Quartz.SimpleTrigger)(context.Trigger));
52
53                //If RepeatCount equals 1,then Refire immediately!
54                if (trigger.RepeatCount == 0)
55                {
56                    JobExecutionException jobException = new JobExecutionException(ex);
57                    // this job will refire immediately
58                    jobException.UnscheduleFiringTrigger = true;
59                    jobException.RefireImmediately = true;
60                    throw jobException;
61                }
62                else
63                {
64                    _log.Info("--- Error in job!");
65                    _log.Error(String.Format("Date:{0} ErrorInfo:{1},StackTrace:{2} ", DateTime.Now.ToString(),
66                        ex.Message, ex.StackTrace));
67                }
68            }
69
70            
71        }
72        #endregion
73    }
74}
75

其中EXECUTION_SERVICENAME以及EXECUTION_ASSEMBLY，这两个字符串常量的值，即对应着配置XML文件中的Assembly以及Type的描述。
之后，就可以用工厂模式，运行各自所需要运行的Job了。