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.NET Forum / ASP.NET / Web Services / September 2005How to automatically start an ASP.NET Web Service
A Web Service, or any ASP.NET application for that matter, is typically first started on the first request to it. I have a need for a Web Service to be automatically started, without receiving a request first. I'd like to avoid having yet another application as a service kick-starting the Web Service. What is the best way to achieve the desired result? (Lets just assume that I really, really, need to have the application start automatically, so we don't need to discuss that). Svante Just to make sure...you want the web service to be initialized AFTER yo do your deployment? If so, how are you doing deployment (XCopy, Setu Package, etc) I like doing the XCopy method, because I can run it via a batch file If I needed to kick off the initialization of the Web Service Afte Deployment, then I would create a small EXE that I can call via th Deployment Batch file that I already have and all that EXE does i creates an HTTPRequest to your Web Service URL and waits for response.... If I needed to do it on a scheduled basis, every so often (for whateve reason...maybe to check availability), and I had SQL Server somewhere, would create a DTS package / Scheduled Job and VBScript it...usin MSXML2.XMLHTTP object... If I didn't have a SQL server, I would create a windows servic (similar to the KickOff.exe file that contacted the Web Service for th First Time). Does that help -- rvira (snip) > Just to make sure...you want the web service to be initialized AFTER you > do your deployment? If so, how are you doing deployment (XCopy, Setup > Package, etc) I need it to be initialized very time IIS restarts and/or the application is (re-)deployed. I.e. - it should always be running. After reboot, after restart of IIS, after (re-)install etc. The manner of deployment is not of concern here. > I like doing the XCopy method, because I can run it via a batch file. > If I needed to kick off the initialization of the Web Service After [quoted text clipped - 13 lines] > > Does that help? Sorry - not really. I don't need to have it started every minute or every hour or whatever (yes, in practice it may in fact work, but it's not quite what I need). It should be started as soon as that web site is started (and of course after (re-)deployment too). A scheduled restart is just a kludge - I'd like there to be a better way. Svante I guess my point is this...I don't believe that there is an intrinsi tool (via .NET framework or Windows API) that will help, so we have t build one... so...if the client asked me to solve this issue, I would 1. Think about all the scenarios (or at least most of them) when you application needs to be re-initialized. You mentioned a few...when II restarts, when you deploy, and other scenarios... 2. Are their any common event hooks or APIs that are called via .NE CLR, Windows API or IIS API...that we can use to monitor and o eventually tie into... - for the .NET CLR there is a profiling tool that I have used in th past to help troubleshoot issues with various applications...its prett good to figure out what the CLR is doing at certain points in th Application life cycle (I have never used it to see what it does t determine if a web application needs to be initialized o not...probably try to look at that this weekend) http://msdn.microsoft.com/msdnmag/issues/01/12/hood/ - for the windows and IIS API calls, I never had to figure those out s I don't have any resources off hand... 3. Once we figure out all the scenarios that need our attention alon with figuring out what you need to tap into to...then we have to figur out how to monitor it... that is how I came up with a Windows Service ( only mentioned SQL Scheduled Job because that is REAL easy to deploy, i we were to just have an app contact the Web Service..to force re-initialization if need be...not try to be a Kludge)...the Window Service is probably one of the easiest thing to create... Anyway, that is the thought process I would use to figure your issu out -- rvira Can you give us an example of how you are going to use this? >(snip) >> Just to make sure...you want the web service to be initialized AFTER you [quoted text clipped - 31 lines] > >Svante Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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