system.timers.timer不会在服务器上触发已发生的事件 [英] system.timers.timer doesn't fire the elapsed event on the server

问题描述

我有一个Web服务，我在其中使用了计时器。当我在我的vs2010中运行服务应用程序时，它的工作就像一个魅力。但是当我将它部署到远程服务器时，它不会触发ElapsedEventHandler。我使用Logger记录事件，并将写入权限设置为日志文件。让我解释一下。我正在尝试编写一份等待工作的服务，而这份工作正在向一个大清单发送电子邮件。和电子邮件应该以20秒的间隔发送。这是我的代码的一部分：

I have a Web Service and i used timers inside it. when i run the service application inside my vs2010 it work''s like a charm. but when i deploy it to the remote server it doesn''t fire the ElapsedEventHandler. I used a Logger to log the events and i set the permissions for write into the log file. Let me explain more. I''m trying to write a service which waits for a job, and the job is sending email to a big list. and emails should be send by 20 secs interval. here is some part of my code:

public class EmailSender : IEmailSender
{

    Queue<AdvEmail> ListOfEmails = new Queue<AdvEmail>();
    List<EmailJob> EmailJobs = new List<EmailJob>();

    Timer timerFetchJobs = null;
    Timer timerSendEmails = null;

    public EmailSender()
    {
        try
        {
            Logger.Log("init service");
            timerFetchJobs = new Timer();
            timerFetchJobs.Interval = 5 * 1000;
            timerFetchJobs.Elapsed += new ElapsedEventHandler(timerFetchJobs_Elapsed);
            timerFetchJobs.Enabled = true;
            timerSendEmails = new Timer();
            timerSendEmails.Interval = 20 * 1000;
            timerSendEmails.Elapsed += new ElapsedEventHandler(timerSendEmails_Elapsed);
            timerSendEmails.Enabled = true;
            timerFetchJobs.Start();
            timerSendEmails.Start();
            Logger.Log("init service Ended Succefully");
            Logger.Log("timerFetchJobs.Enabled=" + timerFetchJobs.Enabled.ToString());
            Logger.Log("timerSendEmails.Enabled=" + timerSendEmails.Enabled.ToString());
        }
        catch (Exception ex)
        {
            Logger.Log("Error in InitService. Message: " + ex.Message);
        }
    }

    void timerSendEmails_Elapsed(object sender, ElapsedEventArgs e)
    {
        timerSendEmails.Stop();
        Logger.Log("Checking for Emails in the Queue");
        // some statments here

        timerSendEmails.Start();
    }

    void timerFetchJobs_Elapsed(object sender, ElapsedEventArgs e)
    {
        timerFetchJobs.Stop();
        try
        {
            FetchJobsFromDB();
        }
        catch (Exception ex)
        {
            Logger.Log("Error in timerFetchJobs. Message: " + ex.Message);
        }
        timerFetchJobs.Start();
    }

当我从浏览器转到服务addreess时，它初始化并正确记录init级别，但没有解雇计时器的线索！我不知道为什么？我做错了什么？谢谢



编辑：这是我在本地运行时的日志文件：



日志条目：1392 / 01/30 08:47:09 :: init service -------------------------------



日志条目：1392/01/30 08:47:09 :: init服务结束成功--------------------- ----------



日志条目：1392/01/30 08:47:09 :: timerFetchJobs.Enabled = True ---- ---------------------------



日志条目：1392/01 / 30 08:47:09 :: timerSendEmails.Enabled = True -------------------------------



日志条目：1392/01/30 08:47:14 ::检查数据库中的工作------------------- ------------



日志条目：1392/01/30 08:47:16 ::有一份新工作。工作名称是Pad 71 -------------------------------



日志条目：1392/01/30 08:47:19 ::为工作添加电子邮件第71页-------------------------- -----



这是我将其部署到远程服务器时的日志文件



日志条目：1392/01/30 08:47:09 :: init service -------------------------------



日志条目：1392/01/30 08：47：09 :: init服务结束成功----------------- --------------



日志条目：1392/01/30 08:47:09 :: timerFetchJobs.Enabled = True -------------------------------



日志条目： 1392/01/30 08:47:09 :: timerSendEmails.Enabled = True -------------------------------

when i go to the service addreess from browser, it initializes and logs the init level correctly, but no clue of firing timers!! which i dont know why?? what I''m doing wrong? thanks

here is the log file when i run it locally:

Log Entry : 1392/01/30 08:47:09 : :init service-------------------------------

Log Entry : 1392/01/30 08:47:09 : :init service Ended Succefully-------------------------------

Log Entry : 1392/01/30 08:47:09 : :timerFetchJobs.Enabled=True-------------------------------

Log Entry : 1392/01/30 08:47:09 : :timerSendEmails.Enabled=True-------------------------------

Log Entry : 1392/01/30 08:47:14 : :Checking for Jobs in the Database-------------------------------

Log Entry : 1392/01/30 08:47:16 : :There is a new job. job name is Pad 71-------------------------------

Log Entry : 1392/01/30 08:47:19 : :Adding Emails for th job Pad 71-------------------------------

And here is the log file when i deploy it to remote server

Log Entry : 1392/01/30 08:47:09 : :init service-------------------------------

Log Entry : 1392/01/30 08:47:09 : :init service Ended Succefully-------------------------------

Log Entry : 1392/01/30 08:47:09 : :timerFetchJobs.Enabled=True-------------------------------

Log Entry : 1392/01/30 08:47:09 : :timerSendEmails.Enabled=True-------------------------------

推荐答案

System.Timers.Timer 有一个 AutoReset 属性您应该设置为 True 。

System.Timers.Timer has a AutoReset property which you should set to True.

我更改了logger类以登录字符串变量并添加操作合同以获取日志一个d问题消失了!!!



现在我有另一个问题。过了一会儿，计时器停了！似乎没有新的请求，IIS关闭服务！我怎么能有一个不定时间服务？

I changed logger class to log in a string variable and add a operation contract to get the log and the problem gone!!!

now i have another problem. after a while the timers stop!! seems when there is no new request, IIS shuts down the service! how can i have a infinitive time service?

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