ASP.NET定时器问题急!!!

比尔咔咔 2006-06-26 06:14:54

在IHttpModule中定义 Timer
但是老是被自动GC回收掉。。。
请问有什么办法避免当前对象被回收 (24小时运行不需要它回收...)

public class SetTime : IHttpModule
{
private static Timer statsTimer;

/// <summary>
/// RunTimePointMin
/// 最小时间和最大时间之间的间隔不能大于定时间隔的2倍
/// </summary>
private DateTime RunTimePointMin;

/// <summary>
/// RunTimePointMax
/// </summary>
private DateTime RunTimePointMax;

// 定时间隔
/// <summary>
/// StatsInterval
/// 建议60秒刷新一次 60000
/// </summary>
private long StatsInterval;

public String ModuleName
{
get { return ""; }
}

// *********************************************************************
// ForumsHttpModule
//
/**/
/// <summary>
/// Initializes the HttpModule and performs the wireup of all application
/// events.
/// </summary>
/// <param name="application">Application the module is being run for</param>
public void Init(HttpApplication application)
{

// Wire-up application events
// 得到Web.Config中的关于
this.StatsInterval = Convert.ToInt64(ConfigurationSettings.AppSettings["StatsInterval"]);
this.RunTimePointMin = Convert.ToDateTime(ConfigurationSettings.AppSettings["RunTimePointMin"]);
this.RunTimePointMax = Convert.ToDateTime(ConfigurationSettings.AppSettings["RunTimePointMax"]);
string aa = ConfigurationSettings.AppSettings["ser"];
Log.Add("1", aa + " Init " + RunTimePointMin.ToString("yyyy-MM-dd HH:mm:ss") + "," + RunTimePointMax.ToString("yyyy-MM-dd HH:mm:ss"));
// 如果使用定时器并且定时器还没初始化

if (statsTimer == null)
{
statsTimer = new Timer(new TimerCallback(EmailCallbackStatsInterval), application.Context, StatsInterval, StatsInterval);

}
}

/**/
/// <summary>
/// 释放定时器
///
/// </summary>
public void Dispose()
{
GC.SuppressFinalize(this);
}

/**/
/// <summary>
/// 定时索引帖子和定时更新论坛统计信息
/// </summary>
private void EmailCallbackStatsInterval(object sender)
{
this.StatsInterval = Convert.ToInt64(ConfigurationSettings.AppSettings["StatsInterval"]);
this.RunTimePointMin = Convert.ToDateTime(ConfigurationSettings.AppSettings["RunTimePointMin"]);
this.RunTimePointMax = Convert.ToDateTime(ConfigurationSettings.AppSettings["RunTimePointMax"]);
string aa = ConfigurationSettings.AppSettings["ser"];
try
{
Log.Add("4", aa + "reflash " + RunTimePointMin.ToString("yyyy-MM-dd HH:mm:ss") + "," + RunTimePointMax.ToString("yyyy-MM-dd HH:mm:ss"));

if (DateTime.Now.Hour * 100 + DateTime.Now.Minute < this.RunTimePointMax.Hour * 100 + this.RunTimePointMax.Minute && this.RunTimePointMin.Hour * 100 + this.RunTimePointMin.Minute < DateTime.Now.Hour * 100 + DateTime.Now.Minute)
{
// 休眠定时器
statsTimer.Change( System.Threading.Timeout.Infinite, StatsInterval );
//处理内容
..

}
}

Log.Add("1", aa + " End night batch");
// 发送Email

}

}
catch (Exception e)
{
Log.Add("1", aa + " " + e.Message);
throw e;
}
finally
{
// 唤醒定时器
statsTimer.Change( StatsInterval, StatsInterval);
}
}

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ccwq 2006-06-29

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amandag 2006-06-27

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CH_MARS 2006-06-27

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蹭分中。。。

比尔咔咔 2006-06-27

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谢谢大家，我尝试下，马上结帖.

ccwq 2006-06-27

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关注楼主的TEST进展

cat_hsfz 2006-06-26

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我也遇到了这样的问题。我是直接模仿CommunityServer的Job来做的，但由于Timer总是被自动回收（就如Session丢失问题一样），所以结果总是做不成功。通过请求避免工作进程停止好像也不行，至少我保持手动每3秒刷新一次，大概每一分钟还是回收一次。

其实不是不想做成Windows Service，但就像模拟CommunityServer那种Job的效果，那样才方便部署。

Session丢失可以把Session托管给StateServer服务，如果ASP.NET增加一个JobServer用于托管Job就好了。