Spring Batch Can Run Ephemeral Apps

Spring boot, believe it or not, can run ephemeral apps. It could be a command line runner and application runner. But let's go through the scenario. I want to read 500,000 records from a database. No, 500 records from a flat file. And I want to filter them, process them, and insert them into a database. Right? Now I can write a lot of code. I can make sure this transactional. I can run it for that. So spring batch says, Oh, you left off at record 200,000. We can make it where you can pick it up and record pick it up at 200,000 or one, and finish that