8/30/2023 0 Comments Net core cron job![]() ![]() So, this is a good candidate for running code periodically, consistently without requiring any page visit. In that method, we can do anything we like. The onRemoveCallback is a delegate to a method which is called whenever a cache item expires. You can do this by utilizing the following method of the Cache class: In ASP.NET, you can add entries in the Cache and set an absolute expiry date time, or you can set a duration after which the item is removed from the cache. We need something that fires consistently and periodically.Ī cache item expires on a given time or duration. Session_Start in Global.asax is triggered when a user visits a page that requires a new session to be initiated. But we can't do anything here because the whole application is going to die soon. When an application stops, we get a callback at Application_End. However, the thread can be killed anytime the web server decides to take a nap due to zero load. So, this is a good place to start a background thread which runs forever and executes scheduled jobs. When an application starts, we get a callback in the Application_Start method of Global.asax. If you plan to execute scheduled jobs on page execution, then the page will take longer to execute, which will result in a poor user experience. Besides, the execution of a request is very short and needs to finish as soon as possible. If nobody visits your website for hours, you can't do the pending jobs for hours. When a session starts and ends/timeouts.Now, there are several ways a web server comes to us: So, we somehow need to get a frequent callback from it so that we can lookup a job queue and see if there's something that needs to be executed. The IIS web server is continuously running. How it worksįirst, we need something in ASP.NET that is continuously running and gives us a callback. As a result, you can have the scheduled job feature in your ASP.NET web projects without buying dedicated servers. This solution runs on any hosting service providing just ASP.NET hosting. I will show you a tricky way to run scheduled jobs using pure ASP.NET without requiring any Windows Service. However, running a scheduled task is a very handy feature, especially for sending reminder emails to users, maintenance reports to administrators, or run cleanup operations, etc. We either have to buy a dedicated server which is very costly, or sacrifice such features in our web solution. But in a shared hosted environment, we do not always have the luxury to deploy our own Windows Service to our hosting provider's web server. As a result, we have to make our own Windows Services to run scheduled jobs or cron jobs. ASP.NET being stateless provides no support to run code continuously or to run code at a scheduled time. This can only be achieved using a Windows Service. How do we run scheduled jobs from ASP.NET without requiring a Windows Service to be installed on the server? Very often, we need to run some maintenance tasks or scheduled tasks like sending reminder emails to users from our websites. ![]()
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