473,568 Members | 2,963 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

timers in WebServices

Hi, can timers be used in webservices?

as an example: to check at some time interval an object -
Application["LoggedUser s"] and for each logged user, check its login
period, and if it is greater than 30 minutes, remove it form the

Thank you,
Nov 21 '05 #1
1 1893

"Bamse" <bd************ **@yahoo.com> wrote in message
news:OF******** ******@TK2MSFTN GP09.phx.gbl...
Hi, can timers be used in webservices?

as an example: to check at some time interval an object -
Application["LoggedUser s"] and for each logged user, check its login
period, and if it is greater than 30 minutes, remove it form the

Thank you,

There are a number of potential issues with using timers from within a Web

First off, don't use System.Timers.T imer. This is because
System.Timers.T imer uses the .NET threadpool which is also used by ASP.NET
to service web requests. With load, there's a chance that the
System.Timers.T imer fails to fire because there is no thread available. If
you must use a timer, use System.Threadin g.Timer instead. See

Another issue is that when your timer fires, you do not have access to the
HttpContext and other similar objects that are created by the ASP.NET
infrastructure for you when a web request comes in. Accessing the
Application object from within a timer callback might or might not work (I
haven't tried).

A more robust approach would be to use e.g., a separate Windows service to
call a Web Method periodically.

Nov 21 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: GDumencu | last post by:
I have a C# program that have to run all the time. For some reasons I cannot make it a service. This program has 3 timers and by time to time ( days or weeks) one of them stops. Some times, starts working again after several hours. Each timer records a message to a file at the beginning and at the end of each timer. I can see the last...
by: Dmitry Demchuk | last post by:
Hi everybody. Recently I ran into situation with System.Threading.Timer in my ASP.NET application. I reinstalled Windows on one of my servers and got timers stop firing events after while, they just stop functioning one-by-one. Here is detailed explanation. I run application on 2 dedicated Win 2003 servers. Server A serves about 1000 active...
by: Cider123 | last post by:
I was originally using: System.Windows.Forms.Timer It started to lock my Window Service up, so I went to the next evolution: System.Threading.Timer All was good. I was using it to send a message once a minute (to
by: Nathan Kovac | last post by:
I have a feeling I am missing something simple, but I just can't find it. Perhaps someone can give me a lead on where to look. I will describe the issue then post my code to the web service. My issue is simply getting timers to work. I have a DatabaseManager.DataManagerFacade which contains a timer. Every 6 seconds it updates stock data...
by: Mark Rae | last post by:
Hi, I've seen several articles about using System Timers in ASP.NET solutions, specifically setting them up in Global.asax' Application_OnStart event. I'm thinking about the scenario where I might need to carry out some back-end processing without pausing the individual users' Session while that process runs. E.g. I might provide the...
by: Michael C# | last post by:
Hi all, I set up a System.Timers.Time in my app. The code basically just updates the screen, but since the processing performed is so CPU-intensive, I wanted to make sure it gets updated regularly; like every 1.5 secs. or so. I only ran into one issue - the MyTimer_Elapsed event handler was not updating the screen correctly all the time,...
by: Komandur Kannan | last post by:
We have a smart device application running on handhelds(Symbol MC9000G). The backend is Oracle and a middle tier web services development done in Vb.net. We use pessimistic Locking due to specific business needs When such a lock is made for a transaction (this code is in the web service) and the handhelds are terminated abnormally (cold...
by: | last post by:
Frustrated.. (I have seen other posts regarding this problem with no resolution..) I am using dotnet 1.1 with latest SP on a Win2KP box (actually 2 boxes), have even run the service on WinXP SP2 box.. I have created a service to grab data off a receive socket (small packets), place in a queue (Queue class), and do an insert into SQL. I have 3...
by: Jonathan Woods | last post by:
Hi there, I have three methods these need to execute at every interval time. I would like to know which option is better? Option A) Three System.Timers.Timer objects these execute each method. timer1.Elapsed += new System.Timers.ElapsedEventHandler(Method1_Elapsed);
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language...
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. ...
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that...
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For...
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the...
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then...
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes...
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in...
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.