Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package cs544.letmegiveexam.service; import cs544.letmegiveexam.dao.UserDAO; import cs544.letmegiveexam.model.User; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; /** * * @author bidur */ @Service public class UserService { @Autowired UserDAO userDAO; @Transactional(propagation = Propagation.REQUIRED) public void updateUser(long userId, User user) { userDAO.update(userId, user); } @Transactional(propagation = Propagation.REQUIRED) public User getUserById(Long Id) { return (User) userDAO.get(Id); } @Transactional(propagation = Propagation.REQUIRES_NEW) public void saveUser(User user) { userDAO.add(user); } @Transactional(propagation = Propagation.REQUIRED) public List<User> getAll() { return userDAO.getAll(); } @Transactional(propagation = Propagation.REQUIRES_NEW) public void addUser(User user) { userDAO.add(user); } @Transactional(propagation = Propagation.REQUIRED) public User getUserByUsername(String username) { return userDAO.findByUsername(username); } }