Reentrancy of timer callback method in ASP.NET

Without further ado, let's look at the code:

using System;
using System.Collections.Generic;
using System.Text;
namespace NET.MST.Sixth.Reenter
{
  class Reenter
  {
    //A static member used to cause thread synchronization issues
    private static int TestInt1=0;
    private static int TestInt2 = 0;
    private static object locko = new object();
    static void Main(string[] args)
    {
      Console.WriteLine("System.Timers.Timer reentrancy test:");
      TimersTimerReenter();
      //Here, it ensures that the started callback method has a chance to complete
      System.Threading.Thread.Sleep(2 * 1000);
      Console.WriteLine("System.Threading.Timer reentrancy test:");
      ThreadingTimerReenter();
      Console.Read();
    }
    /// <summary>
    /// Demonstrates the reentrancy of the System.Timers.Timer callback method
    /// </summary>
    static void TimersTimerReenter()
    {
      System.Timers.Timer timer = new System.Timers.Timer();
      timer.Interval = 100;    //100 milliseconds
      timer.Elapsed += TimersTimerHandler;
      timer.Start();
      System.Threading.Thread.Sleep(2 * 1000); //run2seconds
      timer.Stop();
    }
    /// <summary>
    /// Demonstrates the reentrancy of the System.Threading.Timer callback method
    /// </summary>
    static void ThreadingTimerReenter()
    {
      //100 milliseconds
      using (System.Threading.Timer timer = new System.Threading.Timer)
       (new System.Threading.TimerCallback(ThreadingTimerHandler), null, 0, 100))
      {
        System.Threading.Thread.Sleep(2 * 1000); //run2seconds
      }
    }
    /// <summary>
    /// System.Timers.Timer callback method
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="args"></param>
    private static void TimersTimerHandler(object sender, EventArgs args)
    {
      lock (locko)
      {
        Console.WriteLine("Test integer: " + TestInt1.ToString());
        //sleep10seconds, to ensure method reentrancy
        System.Threading.Thread.Sleep(300);
        TestInt1++;
        Console.WriteLine("Incremental1Post-test integer: " + TestInt1.ToString());
      }
    }
    /// <summary>
    /// System.Threading.Timer callback method
    /// </summary>
    /// <param name="state"></param>
    private static void ThreadingTimerHandler(object state)
    {
      lock (locko)
      {
        Console.WriteLine("Test integer: " + TestInt2.ToString());
        //sleep10seconds, to ensure method reentrancy
        System.Threading.Thread.Sleep(300);
        TestInt2++;
        Console.WriteLine("Incremental1Post-test integer: " + TestInt2.ToString());
      }
    }
  }
}

That's all for this article. I hope the content of this article can bring some help to everyone's learning or work, and I also hope to get more support for the Yelling Tutorial!

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