23-Spring MVC - Project Work | Login Task List & Business Method (Contact App) - By eZeon

This Project Work(Contact App) video is based on LOGIN TASKS AND AUTHENTICATION LOGIC.

TASK LIST FOR LOGIN OPERATION:
1. UserService - check business logic implementation code for user authentication
2. Prepare Dashboard Pages for - Admin and User Roles (link to UserController)
3. Login Form + LoginCommand + Spring MVC Form Taglib
4. Show error messages correctly + JSTL Core Tablib
5. Bind Logged in user with HttpSession scope for further use
6. Role wise menu display

AUTHENTICATION LOGIC:
//UserService.java
public interface UserService {
/**
* The method handles login operation(authentication) using given credentials,
* it returns User object when success and null when failed.
* When user account is blocked an exception will be thrown by this method.
* @param loginName
* @param password
* @return
* @throws in.ezeon.capp.exception.UserBlockedException When user account is blocked.
*/
public User login(String loginName, String password) throws UserBlockedException;

//other method goes here...
}

//UserServiceImpl.java
/**
*
* @author Vikram
*/
@Service
public class UserServiceImpl extends BaseDAO implements UserService {
@Autowired
private UserDAO userDAO;

@Override
public void register(User u) {
userDAO.save(u);
}
@Override
public User login(String loginName, String password) throws UserBlockedException {
String sql = "SELECT userId, name, phone, email, address, role, loginStatus, loginName"
+ " FROM user WHERE loginName=:ln AND password=:pw";
Map m = new HashMap();
m.put("ln", loginName);
m.put("pw", password);
try {
User u = getNamedParameterJdbcTemplate().queryForObject(sql, m, new UserRowMapper());
if(u.getLoginStatus().equals(UserService.LOGIN_STATUS_BLOCKED)){
throw new UserBlockedException("Your accout has been blocked. Contact to admin.");
}else{
return u;
}
} catch (EmptyResultDataAccessException ex) {
return null;
}
}
//impl of other method goes here
}

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Видео 23-Spring MVC - Project Work | Login Task List & Business Method (Contact App) - By eZeon канала Vikram Thakur