Scheduling Batch Job To Run Every N-Minutes in Salesforce.com

Have you ever wondered or come across scheduling batch job to run every N-Minutes( for example 1 minute or 5 minutes)?

Yes, I have! Since this is not possible to do thru standard Salesforce UI.

Sometimes  in order to do so, we go for scheduling multiple times; for example 11 times if it has to be scheduled every 5 minutes. Here is the next question: Can't it be done in a single scheduling attempt? Yes, it can be. The next is the solution..  

So here is a small code to do so for every 5 minutes. You can customize your logic for every N_minutes. You can execute this piece of code in developer console as well.

DateTime myDateTime = System.Now() ;

System.debug('Sudhir myDateTime:: ' + myDateTime) ;

static Integer iHour = myDateTime.hour() ;

System.debug('Sudhir iHour :: ' + iHour) ;

static Integer iMinute = myDateTime.minute() ;

System.debug('Sudhir iMinute:: ' + iMinute) ;

static Integer iSecond = myDateTime.second() ;

System.debug('Sudhir iSecond:: ' + iSecond) ;

for(Integer i = 0; i < 60 ; i = i + N){ 

    if(iSecond > 59){

        iSecond = 0 ;

    }  

  if(iMinute > 55){

        iMinute = 0 ;

        iHour = iHour + 1 ;

    } else{

        iMinute = iMinute + N ;

    }

    String sExpression = String.valueOf(iSecond) + ' ' + String.valueOf(iMinute) + ' ' + '*' +  ' ' + '*' + ' ' + '*' + ' ' + '?' + ' ' + '*' ;

    System.debug('Sudhir sExpression:: ' + sExpression) ;

     ScheduledBatchJob_APIName oScheduledBatchJob_APIName = new ScheduledBatchJob_APIName () ;

     System.schedule('Comment for Scheduled batch Job' + '-' + i, xpression, oScheduledBatchJob_APIName) ;

}

Happy Apex coding and sharing..