Dabbaghi.com

@Component
public class WeatherApiAdapter {
    private final RestClient restClient;
    public WeatherApiAdapter(RestClient restClient) {
        this.restClient = restClient;
    }
    public WeatherInfo getWeather(String city) {
        ExternalWeatherResponse raw = restClient.get()
                .uri("/weather?city={city}", city)
                .retrieve()
                .body(ExternalWeatherResponse.class);
        return new WeatherInfo(raw.temp_c(), raw.condition().text());
    }
}

@Service
public class WeatherService {
    private final WeatherApiAdapter weatherApiAdapter;
    public WeatherService(WeatherApiAdapter weatherApiAdapter) {
        this.weatherApiAdapter = weatherApiAdapter;
    }
    public String getFriendlyForecast(String city) {
        WeatherInfo info = weatherApiAdapter.getWeather(city);
        return info.temp() > 25 ? "It's hot in " + city : "It's mild in " + city;
    }
}

@Component
public class TripPlannerFacade {
    private final WeatherService weatherService;
    private final FlightService flightService;
    private final HotelService hotelService;
    public TripPlannerFacade(WeatherService weatherService,
                              FlightService flightService,
                              HotelService hotelService) {
        this.weatherService = weatherService;
        this.flightService = flightService;
        this.hotelService = hotelService;
    }
    public TripPlan planTrip(String city) {
        return new TripPlan(
                weatherService.getFriendlyForecast(city),
                flightService.findFlights(city),
                hotelService.findHotels(city)
        );
    }
}