How to process logically related rows after ItemReader in SpringBatch?

Question

Scenario

To make it simple, let\'s suppose I have an ItemReader that returns me 25 rows.

1. The first 10 rows belong to student A

2. The

Answer 1

I always follow this pattern:

1. I make my reader scope to be "step", and in @PostConstruct I fetch the results, and put them in a Map
2. In processor, I convert the associatedCollection into writable list, and send the writable list
3. In ItemWriter, I persist the writable item(s) depending on the case