如何在 Quartz.NET 中使用 Job 的属性而不是 JobDataMap 字典？
我正在开发一项 Windows 服务，该服务需要在调用其中一个 Web 服务时安排任务。在最坏的情况下，这种情况每秒可能发生数百次。该任务需要等待一段时间，通常是一两分钟，然后调用传递参数的方法。
我们尝试构建自己的调度程序类来执行此操作：
public void ScheduleTask<T>(TimeSpan delay, Action<T> task, T arg)
{
Thread.Sleep(delay);
threadPool.ExecuteAsync(task, arg);
}
但我们认为这不合适，因为理论上我们可能会导致数百个线程池线程都在等待。我的印象是，可用的线程池线程数量有限，这可能会锁定系统。
然后我转向 Quartz.NET 并在他们的功能页面上阅读到：
作业类实例可以由 Quartz.NET 或应用程序的框架实例化。
在教程第 3 页中，Scheduler 创建了您的 Job 类的实例（而不是您） ）因此：
在作业类上定义数据成员是没有意义的，因为每次作业执行时它们的值都会被“清除”。
请随意对我大喊大叫，但是如何在执行之前获取对 Job 类实例的引用，以便我可以在其上设置属性？
- 该属性正在执行 参数所以我对它不感兴趣 作业执行后。
- 我也想尽量减少数量 实现这一目标所需的对象 保持我的代码整洁和简单。
- 最后，我非常不喜欢使用 因此字典更愿意避免使用 JobDataMap 对象。
I am working on a Windows service which needs to schedule tasks whenever one of it's web services is called. This could happen hundreds of times per second in a worst case scenario. The task needs to wait a period of time, typically a minute or two, then call a method passing a parameter.
We tried to build our own scheduler class to do this:
public void ScheduleTask<T>(TimeSpan delay, Action<T> task, T arg)
{
Thread.Sleep(delay);
threadPool.ExecuteAsync(task, arg);
}
But we figured this wouldn't be appropriate because we could theoretically end up with hundreds of Thread Pool threads all waiting. I am under the impression that there is a finite number of Thread Pool threads available and that this could potentially lock up the system.
I then turned to Quartz.NET and read on their features page that:
Job class instances can be instantiated by Quartz.NET, or by your application's framework.
and on page 3 of their tutorial that the Scheduler creates instances of your Job class (not you) and as such:
it does not make sense to have data-members defined on the job class as their values would be 'cleared' every time the job executes.
Feel free to yell at me, but how do I get a reference to my Job class instance before it executes so I can set a property on it?
- The property is doing the job of a
parameter so i have no interest in it
after the Job has executed. - I also want to minimise the number of
objects it takes to acheive this to
keep my code neat and simple. - Finally, I seriously dislike using
Dictionaries so would prefer to avoid the JobDataMap object.
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我不明白您的用例是什么以及为什么您需要在作业上设置属性，但要回答您的问题：要在作业执行之前访问您的作业，您需要创建一个作业侦听器（实现 IJobListener） 。作业侦听器在作业执行之前被调用，因此您可以在此时设置一个属性。
一些链接：
有关作业侦听器的文档
我写了一篇博客文章，详细介绍了侦听器的创建，此处。
I don't understand exactly what your use case is and why you would need to set a property on the job, but to answer your question: to get access to your job before it executes you need to create a job listener (implement IJobListener). The job listener gets called just before the job gets executed, so you could set a property at that point.
Some links:
The documentation on job listeners
I wrote a blog post detailing the creation of listeners, here.