Lesson: 39 | Batch Apex | Inactive Account Deleter

Apex Class

public class InactiveAccountDeleter implements Database.Batchable<Account> {
    private final Integer INACTIVE_THRESHOLD_MONTHS = 3;

    public Iterable<Account> start(Database.BatchableContext context) {
        Date currentDate = Date.today();
        Date thresholdDate = currentDate.addMonths(-INACTIVE_THRESHOLD_MONTHS);
        return [SELECT Id FROM Account WHERE LastActivityDate < :thresholdDate];
    }

    public void execute(Database.BatchableContext context, List<Account> accounts) {
        Database.delete(accounts, false);
    }

    public void finish(Database.BatchableContext context) {
        // Send an email notification to the administrator
        Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
        String[] toAddresses = new String[] {'admin@example.com'};
        email.setToAddresses(toAddresses);
        email.setSubject('Inactive accounts have been deleted');
        email.setPlainTextBody('All accounts inactive for more than ' + INACTIVE_THRESHOLD_MONTHS + ' months have been deleted.');
        Messaging.sendEmail(new Messaging.SingleEmailMessage[] { email });
    }
}