Spring依赖性自动装配

Question

我有一个Facade，用于通过@Service注释公开的持久性子模块：

@EnableMongoRepositories
@Service
public class MongoFacade {

    @Autowired
    private ShopsRepository shopsRepository;

    public List<Shop> findShopsWithin(double centerLatitude, double centerLongitude, double radiusInKm) {
        List<ShopEntity> shopEntities = shopsRepository.findByLocationWithin(new Circle(centerLongitude, centerLatitude, radiusInKm/111.12));
        List<Shop> shops = new ArrayList<>();
        for (ShopEntity shopEntity : shopEntities) {
            shops.add(new Shop(shopEntity.getPicture(), shopEntity.getName(), shopEntity.getEmail(), shopEntity.getCity(),
                    new Location(shopEntity.getLocation().getY(), shopEntity.getLocation().getX())));
        }

        return shops;
    }
}

我通过@ComponentScan和@Autowired annotations将这个Facade的实例注入到域层的数据库适配器中，我希望这些注释可以作为bean公开，以便能够注入它，如下所示： / p>

@ComponentScan(basePackages = "com.hidden_founders.jobs.software_engineer_java.coding_challenge.shopfinder.tech_services.persistence")
@Component
class MongoShopsProviderAdapter implements IShopsProviderAdapter {

    @Autowired
    private MongoFacade mongoFacade;

    @Override
    public List<Shop> findShopsWithin(GeographicalCircleArea geographicalCircleArea) {
        return mongoFacade.findShopsWithin(geographicalCircleArea.getCenter().getLatitude(),
                geographicalCircleArea.getCenter().getLongitude(),
                geographicalCircleArea.getRadius());
    }
}

然后我尝试将此适配器的实例注入域类，如下所示：

public class GeographicalCircleArea {
    private Location center;
    private double radius;

    @Autowired
    private IShopsProviderAdapter shopsProviderAdapter;

    GeographicalCircleArea(double centerLatitude, double centerLongitude, double radiusInKm) {
        this.center = makeCenter(centerLatitude, centerLongitude);
        this.radius = radiusInKm;
    }

    List<Shop> getShopsWithin() {
        return shopsProviderAdapter.findShopsWithin(this);
    }

    public Location getCenter() {
        return center;
    }

    public double getRadius() {
        return radius;
    }

    private Location makeCenter(double latitude, double longitude) {
        return new Location(latitude, longitude);
    }
}

当我在适配器实现中使用@ComponentScan和@Component时，我得到一个错误，指出即使我已经使用@Service注释，spring也无法自动装入mongo Facade。请指出我错过的内容以及Spring boot autowiring的工作方式。