Implementing a simple custom Timer Job in SharePoint 2010

Simple implementation of an SPTimerJob which moves all files in a specified folder to another, prefixing the filenames with a timestamp. The interval is set to every minute.

1. Create a new empty SharePoint 2010 project
2. Create the following class (make sure the folders specified have been created:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint.Administration;
using System.IO;

namespace HotFolderJob
{
    public class FileMoverJob : SPJobDefinition
    {
        #region Constructors

        //Constructor
        public FileMoverJob() : base() { }

        //Constructor
        public FileMoverJob(string name, SPWebApplication webApp) :
            base(name, webApp, null, SPJobLockType.ContentDatabase) { this.Title = "Hotfolder Timer Job"; }

        #endregion Constructors

        #region Methods - Overridden

        public override void Execute(Guid targetInstanceId)
        {
            const string sourcePath = @"C:\TimerJob\DropFolder";
            const string targetPath = @"C:\TimerJob\TargetFolder";

            if (System.IO.Directory.Exists(sourcePath))
            {
                string[] fullPathFiles = System.IO.Directory.GetFiles(sourcePath);

                foreach (string fullPathfile in fullPathFiles)
                {
                    var originalFileName = Path.GetFileName(fullPathfile);   
                    var destFile = Path.Combine(targetPath, (string.Format("{0:yyMMdd_Hmmss}_", DateTime.Now) + originalFileName)); 
                    File.Move(fullPathfile, destFile);
                    //File.Copy(fullPathfile, destFile);
                }
            }
            
        }

        #endregion Methods - Overridden
    }
}

3. Add a feature, name it as you please
4. Add an event receiver to it and define the activated/deactivated methods as follows:

using System;
using System.Runtime.InteropServices;
using System.Security.Permissions;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Security;
using Microsoft.SharePoint.Administration;

namespace HotFolderJob.Features.HotfolderFeature
{
    [Guid("a2bb921d-dda5-4f0c-923c-da8004a4b09a")]
    public class HotfolderFeatureEventReceiver : SPFeatureReceiver
    {
        const string JOB_NAME = "HotFolderJob";

        public override void FeatureActivated(SPFeatureReceiverProperties properties)
        {
            SPSite site = properties.Feature.Parent as SPSite;

            foreach (SPJobDefinition job in site.WebApplication.JobDefinitions)
            {
                if (job.Name == JOB_NAME)
                    job.Delete();
            }

            FileMoverJob fileMoverJob = new FileMoverJob(JOB_NAME, site.WebApplication);
            SPMinuteSchedule schedule = new SPMinuteSchedule();
            schedule.BeginSecond = 0;
            schedule.EndSecond = 59;
            schedule.Interval = 1;
            fileMoverJob.Schedule = schedule;
            fileMoverJob.Update();

        }
        public override void FeatureDeactivating(SPFeatureReceiverProperties properties)
        {
            SPSite site = properties.Feature.Parent as SPSite;

            foreach (SPJobDefinition job in site.WebApplication.JobDefinitions)
            {
                if (job.Name == JOB_NAME)
                    job.Delete();
            }

        }

        //public override void FeatureInstalled(SPFeatureReceiverProperties properties)
        //{
        //}

        //public override void FeatureUninstalling(SPFeatureReceiverProperties properties)
        //{
        //}

        //public override void FeatureUpgrading(SPFeatureReceiverProperties properties, string upgradeActionName, System.Collections.Generic.IDictionary<string, string> parameters)
        //{
        //}
    }
}

5. Set the feature scope to Site (applies for this example)
6. Deploy and see the magic happen