Get a list of orders which were ordered on 15-Mar-2021, log the order records to the console and then return its product list

LogOrders.java

  
    @RequestMapping("/log-orders")
    public List<Product> logOrdersOnGivenDateAndReturnProducts(@RequestParam("date") final Optional<String> date) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        return orderRepo.findAll().stream()
                .filter(o -> o.getOrderDate().isEqual(LocalDate.parse(date.get(), formatter)))
                .peek(o -> System.out.println(o.toString()))
                .flatMap(o -> o.getProducts().stream())
                .distinct().map(p -> new Product(p.getId(), p.getName(), p.getPrice(), p.getCategory()))
                .collect(Collectors.toList());
    }