Prevent SharePoint 2010 custom timer job to run on all web application

Question

I have successfully created the custom timer job to send status mails on daily basis. For testing I set the minute scheduler on the job and deployed as Web Application Scope.

The timer job is running fine, but it is running for all the Web Application on the SharePoint server Farm.

I want it to run on specific web application. Please help.

Answer 1

Timer Jobs are usually deployed in All Web Application but the actual business logic can be limit to a single web application. This can be accomplished by using a Feature receiver within your timer job. Having the timer job in your web application doesn't mean that your timer job is actually already there so you still need to have a feature receiver in able for your timer job to be attach in a specific web application/s.

In the Feature event receiver you just need to have a code snippets that creates an instance of timer job and then attach to your web application.

for more info you can look at the "Deploying Your Timer Job

http://msdn.microsoft.com/en-us/library/hh528518(v=office.14).aspx

Answer 2

The answer lies in the constructor where you would need to pass the Web Application under which to run. Finally it will get down to activating the Feature deploying the custom time job, only for the proper web application (scope of the Feature should be anyways WebApplication).

public override void Execute(Guid targetInstanceId)
{
  // Execute the timer job logic.
  SPWebApplication webApp = this.Parent as SPWebApplication;
}

http://msdn.microsoft.com/en-us/library/ff798313.aspx and http://msdn.microsoft.com/en-us/library/hh528518(v=office.14).aspx