Interview

new_gist_file.java

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.annotation.Secured;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
@RequestMapping("/register")
public class RegisterController {
    @Autowired
    private RegisterService registerService;

    @Autowired
    private UserDao userDao;

    private void setRegisterService(RegisterService registerService) {
        this.registerService = registerService;
    }

    @RequestMapping("/add/user")
    public void register(String username, String password) {
        if (username == null || username == "") {
            System.err.println("Input is invalid!");
            return;
        }
        if (password == null || password == "") {
            System.err.println("Input is invalid!");
            return;
        }
        List<User> list = registerService.getUsers();
        synchronized (list) {
            for (int i = 0; i < list.size(); i++) {
                if (list.get(i).username == username) {
                    System.err.println("Input is invalid!");
                    return;
                }
            }
        }
        System.out.println("Registering user...");
        synchronized (registerService) {
            registerService.register(username, password);
        }
    }

    @Secured({"DELETE_USERS"})
    @RequestMapping("/delete")
    public void delete(String username, String password) {
        if (username == null || username == "") {
            System.err.println("Username is invalid!");
            return;
        }
        userDao.delete(userDao.findById(username));
    }

    @Secured({"allow-user-listing"})
    @RequestMapping("/")
    public List rootPathMapping() {
        return registerService.getUsers();
    }
}