Quartz.Net调度框架配置解析

在平时的工作中，估计大多数都做过轮询调度的任务，比如定时轮询数据库同步，定时邮件通知等等。大家通过windows计划任务，windows服务等都实现过此类任务，甚至实现过自己的配置定制化的框架。那今天就来介绍个开源的调度框架Quartz.Net（主要介绍配置的实现，因为有朋友问过此类问题）。调度的实现代码很简单，在源码中有大量Demo，这里就略过了。

Quartz.Net当前最新版本Quartz.NET 2.0 beta 1 Released

一、基于文件配置

先看一下简单的实现代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using Quartz;
using Quartz.Impl;
using Common.Logging;

namespace Demo
{
class Program
{
 static void Main(string[] args)
 {

// First we must get a reference to a scheduler
  ISchedulerFactory sf = new StdSchedulerFactory();
  IScheduler sched = sf.GetScheduler();

sched.Start();  
  sched.Shutdown(true);

}
}
}

代码很简单，配置文件中的quartz基础配置，以及job,trigger信息是如何加载的？这个过程是发生 IScheduler sched = sf.GetScheduler();过程，主要体现在源码这一段

public void Initialize()
 {
  // short-circuit if already initialized
  if (cfg != null)
  {
   return;
  }
  if (initException != null)
  {
   throw initException;
  }

NameValueCollection props = (NameValueCollection) ConfigurationManager.GetSection("quartz");

string requestedFile = Environment.GetEnvironmentVariable(PropertiesFile);
  string propFileName = requestedFile != null && requestedFile.Trim().Length > 0 ? requestedFile : "~/quartz.config";

// check for specials
  propFileName = FileUtil.ResolveFile(propFileName);

if (props == null && File.Exists(propFileName))
  {
   // file system
   try
   {
    PropertiesParser pp = PropertiesParser.ReadFromFileResource(propFileName);
    props = pp.UnderlyingProperties;
    Log.Info(string.Format("Quartz.NET properties loaded from configuration file '{0}'", propFileName));
   }
   catch (Exception ex)
   {
    Log.Error("Could not load properties for Quartz from file {0}: {1}".FormatInvariant(propFileName, ex.Message), ex);
   }

}
  if (props == null)
  {
   // read from assembly
   try
   {
    PropertiesParser pp = PropertiesParser.ReadFromEmbeddedAssemblyResource("Quartz.quartz.config");
    props = pp.UnderlyingProperties;
    Log.Info("Default Quartz.NET properties loaded from embedded resource file");
   }
   catch (Exception ex)
   {
    Log.Error("Could not load default properties for Quartz from Quartz assembly: {0}".FormatInvariant(ex.Message), ex);
   }
  }
  if (props == null)
  {
   throw new SchedulerConfigException(
    @"Could not find <quartz> configuration section from your application config or load default configuration from assembly.
Please add configuration to your application config file to correctly initialize Quartz.");
  }
  Initialize(OverrideWithSysProps(props));
 }

通过上面代码分析，初始化首先会检查系统config中是否有<quartz> configuration section节点 （config指的app.config,web.config)，如果系统config有quartz节点，则直接加载此处的配置信息。如果系统config没有quartz的基础配置信息，则会继续查找是否有quartz.config/Quartz.quartz.config 这两个配置文件的存在，如果有则加载配置信息，如果没有则扔出初始化配置异常。

而jobs.xml（调度的任务和触发器plugin节点配置文件）

app.config/web.config 中plugin配置

<quartz>
 <add key="quartz.scheduler.instanceName" value="ExampleDefaultQuartzScheduler"/>
 <add key="quartz.threadPool.type" value="Quartz.Simpl.SimpleThreadPool, Quartz"/>
 <add key="quartz.threadPool.threadCount" value="10"/>
 <add key="quartz.threadPool.threadPriority" value="2"/>
 <add key="quartz.jobStore.misfireThreshold" value="60000"/>
 <add key="quartz.jobStore.type" value="Quartz.Simpl.RAMJobStore, Quartz"/>
<!--******************************Plugin配置********************************************* -->
<add key="quartz.plugin.xml.type" value="Quartz.Plugin.Xml.XMLSchedulingDataProcessorPlugin, Quartz" />
<add key="quartz.plugin.xml.fileNames" value="quartz_jobs.xml"/>
</quartz>

quartz.config 中plugin配置指向（quartz.plugin.xml.type / quartz.plugin.xml.fileNames）

# You can configure your scheduler in either <quartz> configuration section
# or in quartz properties file
# Configuration section has precedence

quartz.scheduler.instanceName = ServerScheduler

# configure thread pool info
quartz.threadPool.type = Quartz.Simpl.SimpleThreadPool, Quartz
quartz.threadPool.threadCount = 10
quartz.threadPool.threadPriority = Normal

#--------------------------------*************plugin配置------------------------------------
# job initialization plugin handles our xml reading, without it defaults are used
quartz.plugin.xml.type = Quartz.Plugin.Xml.XMLSchedulingDataProcessorPlugin, Quartz
quartz.plugin.xml.fileNames = ~/quartz_jobs.xml

# export this server to remoting context
quartz.scheduler.exporter.type = Quartz.Simpl.RemotingSchedulerExporter, Quartz
quartz.scheduler.exporter.port = 555
quartz.scheduler.exporter.bindName = QuartzScheduler
quartz.scheduler.exporter.channelType = tcp
quartz.scheduler.exporter.channelName = httpQuartz

二、基于代码的方式

这种情况直接通过代码实现的，官方DEMO很多都是如此，我们举个例子

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; using Quartz;
using Quartz.Impl;
using System.Threading;
using Common.Logging;

namespace Demo
{
class Program
{
 static void Main(string[] args)
 {
  ILog log = LogManager.GetLogger(typeof(Demo.HelloJob));

log.Info("------- Initializing ----------------------");

// First we must get a reference to a scheduler
  ISchedulerFactory sf = new StdSchedulerFactory();
  IScheduler sched = sf.GetScheduler();

log.Info("------- Initialization Complete -----------");

//---------------------------------------代码添加job和trigger
  // computer a time that is on the next round minute
  DateTimeOffset runTime = DateBuilder.EvenMinuteDate(DateTimeOffset.UtcNow);

log.Info("------- Scheduling Job -------------------");

// define the job and tie it to our HelloJob class
  IJobDetail job = JobBuilder.Create<HelloJob>()
   .WithIdentity("job1", "group1")
   .Build();

// Trigger the job to run on the next round minute
  ITrigger trigger = TriggerBuilder.Create()
   .WithIdentity("trigger1", "group1")
   .StartAt(runTime)
   .Build();

// Tell quartz to schedule the job using our trigger
  sched.ScheduleJob(job, trigger);
  log.Info(string.Format("{0} will run at: {1}", job.Key, runTime.ToString("r")));

// Start up the scheduler (nothing can actually run until the
  // scheduler has been started)
  sched.Start();
  log.Info("------- Started Scheduler -----------------");

// wait long enough so that the scheduler as an opportunity to
  // run the job!
  log.Info("------- Waiting 65 seconds... -------------");

// wait 65 seconds to show jobs
  Thread.Sleep(TimeSpan.FromSeconds(65));

// shut down the scheduler
  log.Info("------- Shutting Down ---------------------");
  sched.Shutdown(true);
  log.Info("------- Shutdown Complete -----------------");
 }
}
}

其实代码方式已经实现了和配置文件混搭的方式了。但是这种对方式是通过配置关联加载job与trigger配置，我们还有第三种方式，自己加载job与trigger配置文件。

三、手动加载配置文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Quartz;
using Quartz.Xml;
using Quartz.Impl;
using Quartz.Simpl;
using System.Threading;
using Common.Logging;
using System.IO;

namespace Demo
{
class Program
{
 static void Main(string[] args)
 {    
  XMLSchedulingDataProcessor processor = new XMLSchedulingDataProcessor(new SimpleTypeLoadHelper());
  ISchedulerFactory sf = new StdSchedulerFactory();
  IScheduler scheduler = sf.GetScheduler();

Stream s = new StreamReader("~/quartz.xml").BaseStream;
  processor.ProcessStream(s, null);
  processor.ScheduleJobs(scheduler);

scheduler.Start();
  scheduler.Shutdown();

}
}
}

亦或者这样 

using System.Text;
using Quartz;
using Quartz.Xml;
using Quartz.Impl;
using Quartz.Simpl;
using System.Threading;
using Common.Logging;
using System.IO;

namespace Demo
{
class Program
{
 static void Main(string[] args)
 {    
  XMLSchedulingDataProcessor processor = new XMLSchedulingDataProcessor(new SimpleTypeLoadHelper());
  ISchedulerFactory sf = new StdSchedulerFactory();
  IScheduler scheduler = sf.GetScheduler();

processor.ProcessFileAndScheduleJobs("~/quartz.xml",scheduler);

scheduler.Start();
  scheduler.Shutdown();

}
}
}

目前根据源码分析大致就这几种配置方式，很灵活可以任意组合。 关于quartz的使用源码很详细，并且园子量有大量的学习文章。

记住quartz的配置读取方式首先app.config/web.config ---->quartz.config/Quartz.quartz.config ---->quartz_jobs.xml .

通过代码方式我们可以改变quartz_jobs.xml 的指向即自己新命名的xml文件  

（默认的quartz_jobs.xml是在XMLSchedulingDataProcessor.QuartzXmlFileName = "quartz_jobs.xml"被指定的）

方式一，通过quartz节点/quartz.config指向指定的jobs.xml。

方式二，通过XMLSchedulingDataProcessor 加载指定的jobs.xml