Exercices sur le modèle hexagonal

import java.math.BigDecimal;
import java.time.LocalDate;
import java.util.List;

class FrequentFlyerCalculator {
    private static final LocalDate CALCULATION_PERIOD_START = LocalDate.of(2020, 9, 10);
    private static final LocalDate CALCULATION_PERIOD_END = LocalDate.of(2020, 11, 10);

    public static void main(String[] args) {
        String passengerName = args[0];

        List<Flight> flights = findAllPassengerFlights(passengerName);

        FrequentFlyerPoints points = new FrequentFlyerPoints();
        points.addAllFlightsWithinDates(flights, CALCULATION_PERIOD_START, CALCULATION_PERIOD_END);

        updatePoints(passengerName, points);
    }

    private static List<Flight> findAllPassengerFlights(String passengerName) {
        EntityManagerFactory factory = Persistence.createEntityManagerFactory("example");

        EntityManager entityManager = factory.createEntityManager();
        Query<Flight> query = entityManager.createNativeQuery("SELECT flight_date, flight_duration FROM flights WHERE passenger_name = ?;", Flight.class);
        query.setParamenter(1, passengerName);
        List<Flight> flights = query.getQueryList();
        entityManager.close();
        return flights;
    }

    private static void updatePoints(String passengerName, FrequentFlyerPoints points) {
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://external-frequent-flyers-api.com/flyers/" + passengerName + "/points"))
            .timeout(Duration.ofMinutes(1))
            .header("Content-Type", "application/x-www-url-form encoded")
            .POST("points=" + points.getTotalPoints())
            .build();

        HttpClient.newHttpClient()
            .send(request, BodyHandlers.ofString());
    }
}

class FrequentFlyerPoints {
    private static final int POINTS_PER_HOUR_OF_FLIGHT = 54;

    private double points;

    public void addAllFlightsWithinDates(List<Flight> flights, LocalDate start, LocalDate end) {
        for (Flight flight: flights) {
            if (flight.getFlightDate().isAfter(start) && flight.getFlightDate().isBefore(end)) {
                double pointsEarned = flight.getFlightDuration().doubleValue() * POINTS_PER_HOUR_OF_FLIGHT;
                points += pointsEarned;
            }
        }
    }

    public double getTotalPoints() {
        return points;
    }
}

class Flight {
    private LocalDate flightDate;
    private BigDecimal flightDuration;

    public LocalDate getFlightDate() {
        return flightDate;
    }

    public BigDecimal getFlightDuration() {
        return flightDuration;
    }
}