I am migrating jdbc to hibernate and i have palced below hibernate configuration in my application.
public class HibernateConfiguration {
@Bean
public LocalSessionFactoryBean sessionFactory() {
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
sessionFactory.setDataSource(dataSource());
sessionFactory.setPackagesToScan(new String[] { "com.cm.models" });
sessionFactory.setHibernateProperties(hibernateProperties());
return sessionFactory;
}
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
dataSource.setUrl(jdbcurl);
dataSource.setUsername(userName);
dataSource.setPassword(password);
return dataSource;
}
private Properties hibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
properties.put("hibernate.show_sql", true);
properties.put("hibernate.format_sql", true);
return properties;
}
@Bean
@Autowired
public HibernateTransactionManager transactionManager(SessionFactory s) {
HibernateTransactionManager txManager = new HibernateTransactionManager();
txManager.setSessionFactory(s);
return txManager;
}
}
my application interacting fine with database at application startup creating hibernate session successfully through session factory giving output also.
**@Autowired
private SessionFactory sessionFactory;**
protected Session getSession() {
return sessionFactory.getCurrentSession();
}
but after application startup when i hitting DAO by controller then session factory bean getting Null reference and throwing NullPointerException due to which unable to create or open hibernate session , i tried to find out solution but that's not working please let me know why above SessionFactory bean having nullPointer due to which issue created.
Just to test my DAO logic I am using this controller and This controller hitting to DAO where sessionFacory bean is null.
@RestController
@RequestMapping("/Emp")
public class myController {
@RequestMapping(value = "/findByChannelManager", method = RequestMethod.GET)
public void findemp() {
HotelDaoImpl hotelDaoImpl=new HotelDaoImpl();
List <HotelEntity> list = new ArrayList<>();
list = hotelDaoImpl.findByChannelManager (EnumCM.AR);
for (HotelEntity pro : list) {
System.out.println(pro);
}
}
}
@Repository
@Transactional
public class HotelDaoImpl extends AbstractDao implements IHotelDao {
@SuppressWarnings({ "unchecked", "unused" })
@Override
public List<HotelEntity> findByChannelManager(EnumCM cm) {
List<HotelEntity> list = null;
try {
Session s = getSession();
Criteria criteria=s.createCriteria(Hotel.class);
criteria.add(Restrictions.eq("channelManager", "cm.name()"));
list = criteria.list();
}catch(Exception e) {
LOGGER.debug("error " +e.getMessage());
e.printStackTrace();
}
return list;
}
public abstract class AbstractDao {
@Autowired
private SessionFactory sessionFactory;
protected Session getSession() {
return sessionFactory.getCurrentSession();
}
}
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