Lesson: Batch Class Without Query

Apex

global class BatchApex implements Database.Batchable<Integer> {    
    // Data to process
    private List<Integer> numbers;

    // Constructor to initialize the data
    global BatchApex(List<Integer> numbersToProcess) {
        numbers = numbersToProcess;
    }
    
    // Start method where we pass the collection as iterable
    global Iterable<Integer> start(Database.BatchableContext BC) {
        return numbers;
    }

    // Process the scope
    global void execute(Database.BatchableContext BC, List<Integer> scope) {
        for (Integer num : scope) {
            // Create a single contact
            Contact con = new Contact();
            con.LastName = 'Test' + num; // Assign a unique name
            con.Email = 'enginsalesforce@gmail.com'; // Assign a test email
            insert con;

           
        }
    }

    // Finish method
    global void finish(Database.BatchableContext BC) {
        System.debug('Batch processing completed.');
    }
}