在Global中使用线程隔时处理任务

有的时候我们需要隔一段时间做一些处理，可以在Web.Config中使用线程来处理
(书中学习，整理了一下，以下是过5分钟删除一张表的记录)
using System;
using System.Collections;
using System.ComponentModel;
using System.Web;
using System.Web.SessionState;
using DataBase;
using System.Data.SqlClient;
using System.Web.Security;
using System.IO ;
using System.Threading;
namespace FreightCom
{
/// <summary>
/// Global 的摘要说明。
/// </summary>
public class Global : System.Web.HttpApplication
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;
private OnLineUser ou=new OnLineUser();
private UserLoginInfo Login=new UserLoginInfo();
public Global()
{
InitializeComponent();
}

protected void Application_Start(Object sender, EventArgs e)
{
SchedulerAgent.StartAgent();
}

protected void Session_Start(Object sender, EventArgs e)
{

}

protected void Application_BeginRequest(Object sender, EventArgs e)
{

}

protected void Application_EndRequest(Object sender, EventArgs e)
{

}

protected void Application_AuthenticateRequest(Object sender, EventArgs e)
{

}

protected void Application_Error(Object sender, EventArgs e)
{

}

protected void Session_End(Object sender, EventArgs e)
{

}

protected void Application_End(Object sender, EventArgs e)
{
SchedulerAgent.Stop();
}

#region Web 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
}
#endregion
}

public interface ISchedulerJob
{
void Execute();
}

public class SchedulerConfiguration
{
private int sleepInterval;
private ArrayList jobs=new ArrayList();
public int SleepInterval
{
get{return sleepInterval;}
}
public ArrayList Jobs
{
get {return jobs;}
}
public SchedulerConfiguration(int newSleepInterval)
{
sleepInterval=newSleepInterval;
}
}

public class Scheduler
{
private SchedulerConfiguration configuration = null;
public Scheduler(SchedulerConfiguration config)
{
configuration=config;
}
public void Start()
{
while(true)
{
try
{
foreach(ISchedulerJob job in configuration .Jobs)
{
job.Execute();
}

}
catch{}
finally
{
Thread.Sleep(configuration.SleepInterval);
}
}
}
}
public class SchedulerAgent
{
private static System.Threading.Thread schedulerThread=null;
public static void StartAgent()
{
SchedulerConfiguration config=new SchedulerConfiguration(1000*300);//设置时间，此处为5分钟
config.Jobs.Add(new AlertJob());
Scheduler scheduler=new Scheduler(config);
System.Threading.ThreadStart myThreadStart=new System.Threading.ThreadStart(scheduler.Start);
schedulerThread=new System.Threading.Thread(myThreadStart);
schedulerThread.Start();
}
public static void Stop()
{
if(null!=schedulerThread)
{
schedulerThread.Abort();
}
}
}

public class AlertJob:ISchedulerJob
{
private OnLineUser ou=new OnLineUser();
public void Execute()
{
ou.UserDelOnline();//一个删除的方法
}
}
}