如何计划在Windows Azure中工作者角色任务 [英] How to Schedule a task in windows azure worker role

问题描述

我有在中午12点执行任务，每天一个简单的Azure工作者角色上运行。下面是code，完成此。

I have a simple Azure Worker role running that performs a task every day at 12 PM. Below is the code that accomplishes this.

public override void Run()
{
    try
    {
        while (true)
        {
              int time = Convert.ToInt32(DateTime.Now.TimeOfDay);
              if (time == 12)
              {
                   DoSomethingElse();
              }
        }

    }
    catch (Exception ex)
    {
        Log.Add(ex, true);
    }            
}

下面 DoSomethingElse（）是在每天下午12点发送电子邮件的方法，同时也触发一次，每天只有一次。

Here DoSomethingElse() is a method to send an email at every day 12 PM, and also fires once and only once per day.

我如何能实现调度火灾时，时间是中午12点执行 DoSomethingElse（）。

How can I implement a scheduler that fire when the time is 12PM and execute DoSomethingElse().

我的问题是：这是（高于code）是最好的方法或使用任何第三方工具。

My question is: Is this (above code) is the best method or use any 3rd party tool.

推荐答案

有几个在这里的其他问题的处理这（和我上面标之一）。话虽如此，在重复什么其他的答案已经状态的风险：

There are several other questions here that deal with this (and I've marked one above). Having said that, and at the risk of repeating what other answers already state:

在你的情况，在Windows Azure的队列一个简单的信息，延时不显示，直到中午时分，会工作。这也有助于应对多实例情况：如果你运行你的角色的两个实例，你不想跑两次相同的计划任务，所以您需要一种方法来只有这些实例之一执行此code。这是很容易通过队列中的消息处理，或者你可以通过使用类似一个blob租赁（可能只有反对一个写锁）作为一个互斥体上的单个实例上运行调度code。这是覆盖在@ smarx的博客文章，这里 。

In your case, a simple message on a Windows Azure Queue, time-delayed to not show up until noon, would work. This also helps deal with multi-instance scenarios: If you're running two instances of your role, you don't want the same scheduled task running twice, so you need a way to have only one of those instances execute this code. This is easily handled via queue message, or you could run scheduler code on a single instance by using something like a blob lease (which may only have one write-lock against it) as a mutex. This is covered in @smarx's blog post, here.

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