Consider defining a bean of type 'org.hibernate.SessionFactory' in your configuration

Question

I am new to JavaEE and i have been working on a simlpe Springboot project. Each time i run it i get this error:

Please feel free to answer to my question and any improvemnet in the code is Highly Appreciate.

Field sessionFactory in com.example.dao.CartDaoImpl required a bean of type 'org.hibernate.SessionFactory' that could not be found.

Action:

Consider defining a bean of type 'org.hibernate.SessionFactory' in your configuration.

Answer 1

It is possible to get Session from EntityManager which is already configured in spring-boot-starter-data-jpa . So inject EntityManager instead of SessionFactory:

    @Autowired
    private EntityManager entityManager;

    private Session getSession() {
        return entityManager.unwrap(Session.class);
    }

And use getSession() method where you need.

Answer 2

1. you need:
   • Add the SessionFactory bean in the Application class.
   • Add the Current Session Context class in application.properties.
   • Use the SessionFactory using @Autowired annotation.
   • add into application.properties

spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate4.SpringSessionContext

and add this

spring.datasource.url=......
spring.datasource.username=....
spring.datasource.password=.....
spring.jpa.properties.hibernate.dialect=.......
spring.jpa.hibernate.ddl-auto=update

2. you use @Transactional, but you didn't configured it.You should also configure it. add @EnableTransactionManagement into config class and config this bean.

here is good example for configuration A Guide to Hibernate with Spring 4

---

Just remarks: 1# you use in UserServiceImpl for example

@Component
@Service
public class UserServiceImpl implements UserService {...
  ....
}

use only @Component or @Service but not both as it's redundant. Service is alread a Component.

2# in methods where you have only read operation us instead of default @Transactional this @Transactional(readOnly = true)

3# in methods like void addCustomerOrder(CustomerOrder customerOrder); better return boolean or some object like CustomerOrder than return just void.

4# class Queries is not Serializable

5# better use lazy as default value than fetch = FetchType.EAGER

6# dao class CartDaoImpl has dependency on service class, it's strange.

7# in some cases you have transaction on dao level in another on service

8# if you can create sub package impl and move all implementation into one.

you will have com.dao with N interfaces and com.dao.impl with N implementations for them, and not one package com.dao with N+N intercases and classes

---

add this into pom.xml

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

and create package configs com.configs and configure like DatabaseConfig

Answer 3

i see you project and i found that there is no SessionFactory class or configuration for SessionFactory into your project and you are use @Autowired for SessionFactory in CartDaoImpl clas. that is the main issue. you need to configure the SessionFactory

yo can refer bellow example: http://www.devglan.com/spring-boot/spring-boot-hibernate-5-example

Answer 4

Create service and use it to get session from EntityManager:

@Service
public class HibernateService {

    @PersistenceContext
    private EntityManager entityManager;

    public <R> NativeQuery<R> createNativeQuery(String sqlString, Class<R> resultClass) {
        return getSession().createNativeQuery(sqlString, resultClass);
    }

    public NativeQuery createNativeQuery(String sqlString) {
        return getSession().createNativeQuery(sqlString);
    }

    public Session getSession() {
        return entityManager.unwrap(Session.class);
    }
}

you can add more methods to reduce amount of written code.

Answer 5

Using Hibernate 5 simple check the below

-- Check the base package is scan (HibernateConfig.java)

-- Check the valid annotation in file @Configuration @EnableTransactionManagement

-- check the all valid beans are created or not LocalSessionFactoryBean,HibernateTransactionManager,HibernateTemplate