Implementing a job scheduler for ASP.NET MVC

问题

I need to execute some activities/jobs in my Web Server, such as indexing some information, organizing some files, and calculating some statistics...

I want to preserve the QoS in my Web Server (performance, memory consumption, ...). So I'm thinking of executing an external process for these activities, instead of calling in a thread. Something similar to Apache MPM processer (it launches child processes to process the requests).

Do know any best solution to do this?
Do you know any library that could do this for me?

Thanks in advanced.

回答1:

You may take a look at Quartz.NET which allows you to schedule jobs which will run on the server.

回答2:

Could you do something like they use on the Stack Exchange sites?

http://blog.stackoverflow.com/2008/07/easy-background-tasks-in-aspnet/

回答3:

Well, I finally implemented a system to execute tasks/jobs in a external process.

If someone want to know how I implemented it, here are some of the details. Maybe I will write an article to share the solution and the source code.

Basically, we have two components, the Web.dll (ASP.NET application) and a program called TaskExecutor.exe

In the Web.dll, there is an activity scheduler that can register tasks by name: for example:

ActivityScheduler.Get().RegisterActivity("GenerateSearchIndexes", 4 * 1000 * 60 * 60); //each 2 hours

The activity scheduler executes each activity in a thread, and this thread calls an external process, the ActivityExecutor.exe

This assembly has a reference to the Web.dll that has a static ActivityFactory to get the activities. The source code of the external process is quite simple:

public static void Main (string[] args)
{
    try
    {
        if (args.Length == 0)
        {
            throw new ArgumentException("No activity name given", "ActivityName");
        }
        //parameter 0 is the activity name
        string activityName = args[0];
        IScheduledActivity activity = ActivityFactory.GetActivity(activityName);

        if (activityName != null)
        {
            activity.Execute(args);
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine("Error executing activity: " + ex.Message);
    }
}

As you can guess the restriction here is that the activities must be statically defined, so they cannot receive paramenters in its constructor. The are passed in the IScheduledActivity.Schedule(string[] args) method, in the same way as a program would do.

来源：https://stackoverflow.com/questions/4264445/implementing-a-job-scheduler-for-asp-net-mvc

标签

asp.net-mvc-2

webserver

scheduled-tasks