How to schedule a batch class after every X mins?

I had recently a issue arised where I had to schedule the apex batch job but in the experience cloud the batch job was not getting due to technical limitation.

I had tried all the mechanism to execute the batch like, provide the permission set to the user, permission at the profile level which is providing the batch class access to the profile. BUT BATCH DIDN’T GOT EXECUTED THROUGH EXPERIENCE CLOUD.

So came to an alternative where I scheduled the batch using a scheduling class.

The solultion requires that, it checks first if any other existing job is executed and lined up for the next execution, ABORT it and then schedule the another job in the finish method of the batch class.

global without sharing class AsynchronousProcessBatch implements Database.Batchable<sObject>,Database.AllowsCallouts,Database.Stateful{
    
    global Database.QueryLocator start(Database.BatchableContext BC) {
        String query = 'select query that fulfils the number of records here';
        return Database.getQueryLocator(query);
    }
 
    global void execute(Database.BatchableContext BC,List<SObject> scope){
        system.debug('scope :' + scope);
        // Your BUSINESS LOGIC CLASS CALLED HERE
        MYBusinessClass bgClass = new MYBusinessClass();
        bgClass.myBusinessMethodCalled();
    }
     
    global void finish(Database.BatchableContext BC){ 
        //Abort the existing job
        Set<Id> crnJobDtSet = new Set<Id>();
        List<CronJobDetail> cjDetailList = [SELECT Id, Name, JobType FROM CronJobDetail WHERE Name LIKE 'DocRqStarted at%'];
        for(CronJobDetail cjd : cjDetailList){
            crnJobDtSet.add(cjd.Id);
        }
        Set<Id> cronTriggerId = new Set<Id>();
        List<CronTrigger> cronTriggerList = [SELECT Id, CronJobDetailId,CronJobDetail.Name, PreviousFireTime, State, StartTime, 
            EndTime, CronExpression, CreatedDate, TimesTriggered FROM CronTrigger WHERE CronJobDetailId IN :crnJobDtSet AND TimesTriggered > 0];
        Set<Id> cronJobIds = (new Map<Id, CronTrigger>(cronTriggerList)).keyset();
        for(Id cronId : cronJobIds){
            System.abortJob(cronId);
        }
         
        String hour = String.valueOf(Datetime.now().hour());
        //You can add any no of Minute you want to add to schedule it for next Here it is 2 mins
        String min = String.valueOf(Datetime.now().addMinutes(2).minute());
        String ss = String.valueOf(Datetime.now().second());
         
        //parse to a cron expression
        String nextFireTime = ss + ' ' + min + ' ' + hour + ' * * ?';
         
        //Create an Instance of your Schedule Class
        ScheduleMyJob s = new ScheduleMyJob();
        System.schedule('DocRqStarted at' + String.valueOf(Datetime.now()), nextFireTime, s);
    }
}

Also we need to create a schedulable class which calls this batch. So this way the batch is continuously running after every X minutes. Also, cleaning up the jobs that are already executed.

global without sharing class SchedulerJob implements Schedulable{   
    global void execute(SchedulableContext sc)
    {
        AsynchronousProcessBatch b = new AsynchronousProcessBatch();
        database.executeBatch(b, 1); // if you need to increase the chunk size then you can put any other number
    }
}

                              Peace ✌️