Custom SharePoint Timer Job

Know more about Timer Job

• A timer job runs in a specific Windows service for SharePoint Server.
• Timer jobs also perform infrastructure tasks for the Timer service, such as clearing the timer job history and recycling the Timer service; and tasks for Web applications, such as sending e-mail alerts.
• A timer job contains a definition of the service to run and specifies how frequently the service is started.
• The SharePoint 2010 Timer service (SPTimerv4) runs timer jobs.
• Many features in SharePoint Server rely on timer jobs to run services according to a schedule.

For custom timer job creation need to follow the below steps or procedures:
- Inherit class from SPJobDefintion (using Microsoft.SharePoint.Administration)
- Creatig Timer Job in feature activated event receiver as per specifications as shown in below code


//Create class derived from SPJonDefinition Class
 class ListTimerJob : SPJobDefinition
    {
         public ListTimerJob()
            : base()
        {
        }
        public ListTimerJob(string jobName, SPService service, SPServer server, SPJobLockType targetType)
            : base(jobName, service, server, targetType)
        {
        }
        public ListTimerJob(string jobName, SPWebApplication webApplication)
            : base(jobName, webApplication, null, SPJobLockType.ContentDatabase)
        {
            this.Title = "List Timer Job";
        }
        public override void Execute(Guid contentDbId)
        {
            // get a reference to the current site collection's content database
            SPWebApplication webApplication = this.Parent as SPWebApplication;
            SPContentDatabase contentDb = webApplication.ContentDatabases[contentDbId];
            // get a reference to the "ListTimerJob" list in the RootWeb of the first site collection in the content database
            SPList Listjob = contentDb.Sites[0].RootWeb.Lists["ListTimerJob"];
            // create a new list Item, set the Title to the current day/time, and update the item
            SPListItem newList = Listjob.Items.Add();
            newList["Title"] = DateTime.Now.ToString();
            newList.Update();
        }
}

- Schedule the timer job with specified time duration.

//Add Event receiver at Feature Level
[Guid("9a724fdb-e423-4232-9626-0cffc53fb74b")]
public class Feature1EventReceiver : SPFeatureReceiver
    {
        const string List_JOB_NAME = "ListLogger";
        // Uncomment the method below to handle the event raised after a feature has been activated.
        public override void FeatureActivated(SPFeatureReceiverProperties properties)
        {
            SPSite site = properties.Feature.Parent as SPSite;
            // make sure the job isn't already registered
            foreach (SPJobDefinition job in site.WebApplication.JobDefinitions)
            {
                if (job.Name == List_JOB_NAME)
                    job.Delete();
            }
            // install the job
            ListTimerJob listLoggerJob = new ListTimerJob(List_JOB_NAME, site.WebApplication);
            SPMinuteSchedule schedule = new SPMinuteSchedule();
            schedule.BeginSecond = 0;
            schedule.EndSecond = 59;
            schedule.Interval = 5;
            listLoggerJob.Schedule = schedule;
            listLoggerJob.Update();
        }

- Delete custom timer job from webapplication level defintions.

        // Uncomment the method below to handle the event raised before a feature is deactivated.
        public override void FeatureDeactivating(SPFeatureReceiverProperties properties)
        {
            SPSite site = properties.Feature.Parent as SPSite;
            // delete the job
            foreach (SPJobDefinition job in site.WebApplication.JobDefinitions)
            {
                if (job.Name == List_JOB_NAME)
                    job.Delete();
            }
}