How to Execute Batch apex class from controller

Question

I am Executing Batch apex class from normal controller It is executing Start Method but it is not going to Execute method Can you please help me on this

     SampleChargeBatch1  chargeBatch =new SampleChargeBatch1();
     ID batchprocessid = Database.executeBatch(chargeBatch);

Answer 1

I would typically set up a batchable context like the code below.

Execute via a schedule like: OpportunityLineItemsRefreshJob.scheduleMe();

To execute from a controller I would do the following:

OpportunityLineItemsRefreshJob  batchJob = new OpportunityLineItemsRefreshJob();
ID batchprocessid = Database.executeBatch(batchJob);

// .... // ....

global with sharing class OpportunityLineItemsRefreshJob implements System.Schedulable, Database.Batchable<SObject>, Database.Stateful
    {

        // Schedule String
        public static String sched = '0 00 00 * * ?';  //Every Day at Midnight

        // Method to execute schedule
        global static String scheduleMe() 
        {
            OpportunityLineItemsRefreshJob Job = new OpportunityLineItemsRefreshJob(); 
            return System.schedule('Refresh OLIs for Roll Up Summary Fields', sched, Job);
        }

        global void execute(SchedulableContext sc)
        {
            // Start the job once the scheduled time has arrived
            Database.executeBatch(new OpportunityLineItemsRefreshJob());        
        }

        public Database.QueryLocator start(Database.BatchableContext context)
        {
            // Obtain appoprite query locator from the selector
            return new OpportunityLineItemsSelector().queryLocatorReadyToMassUpdate();  
        }

        public void execute(Database.BatchableContext context, List<OpportunityLineItem> olis)
        {
            try
            {
                // OpportunityLineItems ready to Update
                Set<Id> olisToUpdate = new Map<Id, SObject>(olis).keySet();

                new OpportunityLineItemService().updateOLIMassUpdate(olisToUpdate);
            }
            catch (Exception e)
            {
                // Catch
            }
        }

        public void finish(Database.BatchableContext context)
        {

        }

    }