@Entity
class Division {
  
  long id;
  String name;

}

@Entity
class User {
   
   long id;
   String login;
   String name;
   Division division;

}

interface UserRepository {
  
   User getUserByLogin(String login);

   boolean save(User user);

}

@Service
class UserServiceImpl {

   private final UserRepository userRepository;

   User getDivisionByLogin(String login) {
      return userRepository.getUserByLogin(String login).getDivision();
   }

   String getNameByLogin(String login) {
     return userRepository.getUserByLogin(String login).getName();
   }

  boolean changeLogin(String login) {
    User user = userRepository.getUserByLogin(String login);
    user.setLogin(login);
    userRepository.save(user);
  }

}

    public Product GetProduct(int id)
    {
        var cacheKey = GetKey(id);
        var product = _cache.Get<Product>(cacheKey);
        if (product == null)
        {
            product = _decoratedRepository.GetProduct(id);
            _cache.Set(cacheKey, product, DateTimeOffset.Now.AddHours(ExpirationInHours));
        }
        
        return product;
    }

public Object get(Object arg1, Object arg2,...) {
   Object[] key = new Object[] {arg1, arg2};
   Value<?> result = cache().get(key);
   if (result == null) {
      result = new Value(doGet(arg1, arg2));
      cache().put(key, result);
   }
   return result.getValue();
}