将Quartz.NET集成到 Castle中
Castle是针对.NET平台的一个开源项目,从数据访问框架ORM到IOC容器,再到WEB层的MVC框架、AOP,基本包括了整个开发过程中的所有东西,为我们快速的构建企业级的应用程序提供了很好的服务.具体可参看TerryLee的Castle 开发系列文章。
可以通过称为 Facility 的组件用控制反转 (Inversion of Control, IoC) 和依赖注入将 第三方组件插入内核中。Startable Facility当一个组件满足一定的依赖关系之后,让它自动运行,比如说启动一个窗体或者启动某种服务。 Startable Facility的使用可以说是非常地简单,只要我们的组件实现了IStartable接口就可以了,关于Startable Facility具体可参看Castle IOC容器实践之Startable Facility(一)、Castle IOC容器实践之Startable Facility(二)。Quartz 是一个要与 Castle集成的大项目,因为它仅需要您用 Castle的生命周期来启动和停止它。这意味着,当 Castle启动时,您想要 Quartz 启动,当 Castle关闭时,您想要 Quartz 停止。
为了保持本示例的简单性,Quartz 配置使用 Quartz 发行版附带的默认值。这些默认值位于 quartz.properties 文件中,该文件是 dll 文件的一部分。要配置 Quartz 以将数据库用于持久层、远程调度和其他高级选项,必须创建自定义的 quartz.properties 文件。
Quartz 调度器易于启动和关闭;它只通过调用 StdSchedulerFactory.DefaultScheduler 来检索调度器对象。要启动 Quartz,执行 Scheduler.Start() 方法。要停止 Quartz,执行 Scheduler.Shutdown() 方法。要使 Quartz 的生命周期跟随 Castle,将 Start() 调用放入 IStartable的 Start() 方法中,并将 Shutdown() 调用放入 IStartable的 Stop() 方法中。清单 3 展示了添加 Quartz 代码之后完整的实现。
1: using Castle.Core;
2: using Quartz.Impl;
3: using Quartz;
4: using Common.Logging;
5: using System.Threading;
6: 7: namespace QuartzComponent
8: { 9: [Transient]10: public class QuartzStartable : IStartable
11: {12: private ISchedulerFactory _schedFactory;
13: 14: private static ILog log = LogManager.GetLogger(typeof(QuartzStartable));
15: 16: public QuartzStartable(ISchedulerFactory schedFactory)
17: { 18: _schedFactory = schedFactory; 19: } 20: 21: public void Start()
22: {23: log.Info("Starting service");
24: IScheduler sched = _schedFactory.GetScheduler(); 25: 26: log.Info("------- Scheduling Jobs ----------------");
27: 28: // jobs can be scheduled before sched.start() has been called
29: 30: // get a "nice round" time a few seconds in the future...
31: DateTime ts = TriggerUtils.GetNextGivenSecondDate(null, 15);
32: 33: // job1 will only fire once at date/time "ts"
34: JobDetail job = new JobDetail("job1", "group1", typeof(SimpleQuartzJob));
35: SimpleTrigger trigger = new SimpleTrigger("trigger1", "group1");
36: // set its start up time
37: trigger.StartTime = ts;38: // set the interval, how often the job should run (10 seconds here)
39: trigger.RepeatInterval = 10000;40: // set the number of execution of this job, set to 10 times.
41: // It will run 10 time and exhaust.
42: trigger.RepeatCount = 100; 43: 44: 45: // schedule it to run!
46: DateTime ft = sched.ScheduleJob(job, trigger);47: log.Info(string.Format("{0} will run at: {1} and repeat: {2} times, every {3} seconds",
48: job.FullName, ft.ToString("r"), trigger.RepeatCount, (trigger.RepeatInterval / 1000)));
49: log.Info("------- Waiting five minutes... ------------");
50: 51: sched.Start();52: try
53: {54: // wait five minutes to show jobs
55: Thread.Sleep(300 * 1000);56: // executing...
57: }58: catch (ThreadInterruptedException)
59: { 60: } 61: 62: 63: } 64: 65: public void Stop()
66: {67: log.Info("Stopping service");
68: try
69: { 70: IScheduler scheduler = _schedFactory.GetScheduler();71: scheduler.Shutdown(true);
72: }73: catch (SchedulerException se)
74: {75: log.Error("Cannot shutdown scheduler.", se);
76: } 77: 78: } 79: } 80: }将Quartz.net集成到Castle容器中,只需要几行代码就可以了,就会在Castle容器启动的时候自动启用Quartz.net的作业调度。
1: namespace QuartzComponent
2: {3: class ConsoleMain
4: {5: static ILog log = LogManager.GetLogger(typeof(ConsoleMain));
6: 7: [STAThread]8: public static void Main(string[] args)
9: {10: IWindsorContainer container = new WindsorContainer();
11: //添加Facility
12: 13: container.AddFacility("startable", new StartableFacility());
14: 15: container.AddComponent("Scheduler", typeof(ISchedulerFactory), typeof(StdSchedulerFactory));
16: 17: container.AddComponent("QuartzStartable", typeof(QuartzStartable));
18: 19: //Console.Read();
20: } 21: } 22: }结束语
对于大多数开源项目,实现少量工作就可以集成到Castle容器中,类似 Quartz.net 的应用程序是简单集成的优秀候选项,因为它只需要启动和关闭。有很多与 Quartz.net 一样简单的有助于集成的开源项目。
下载例子代码: QuartzComponent.zip
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