Transaction controller for Digital Payment Assistant API

gistfile1.java

@RestController
public class TransactionController {

    private TransactionRepository transactionRepo;

    private CategoryRepository categoryRepo;

    private SessionRepository sessionRepo;

    private TransactionServiceImpl transactionServ;

    @Autowired
    public TransactionController(TransactionRepository transactionRepo, CategoryRepository categoryRepo,
                                 SessionRepository sessionRepo, TransactionServiceImpl transactionServ) {
        this.transactionRepo = transactionRepo;
        this.categoryRepo = categoryRepo;
        this.sessionRepo = sessionRepo;
        this.transactionServ = transactionServ;
    }



    private static final Logger log = LoggerFactory.getLogger(TransactionController.class);

    @RequestMapping(value = "/transactions", method = RequestMethod.GET)
    public List<Transaction> doGetTransactions(@RequestParam(value = "offset", defaultValue = "0") int offset,
                                 @RequestParam(value = "limit", defaultValue = "20") int limit,
                                 @RequestParam(value = "category", required = false) Category category,
                                 @RequestParam(value = "session_id", required = false) Session sessionId,
                                 @RequestHeader(value = "X-session-ID", required = false) Session headerSessionID){
        log.info("'GET /transactions' has been requested ...");
        verifySessionId(sessionId, headerSessionID);
        List<Transaction> transactions = transactionServ.findByCategoryWithOffsetAndLimit(offset, limit, category);
        for (Transaction tr: transactions){
            log.info(tr.toString());
        }
        log.info("The 'GET /transactions' response has been sent !");
        return transactions;
    }
//.............
}