org.hibernate.HibernateException: No Session found for current thread

Question

I'm getting the above exception with Spring3 and Hibernte4

The following is my bean xml file

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:tx="http://www.springframework.org/schema/tx"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="     http://www.springframework.org/schema/beans     http://www.springframework.org/schema/beans/spring-beans-3.0.xsd     http://www.springframework.org/schema/context     http://www.springframework.org/schema/context/spring-context-3.0.xsd     http://www.springframework.org/schema/tx     http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">     <context:annotation-config/>      <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">       <property name="driverClassName" value="com.mysql.jdbc.Driver"/>       <property name="url" value="jdbc:mysql://localhost:3306/GHS"/>       <property name="username" value="root"/>       <property name="password" value="newpwd"/>   </bean>    <bean id="sessionFactory"       class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">     <property name="dataSource" ref="dataSource"/>     <property name="hibernateProperties">         <props>             <prop key="dialect">org.hibernate.dialect.MySQL5Dialect</prop>         </props>     </property>     <property name="packagesToScan">         <list>             <value>com.example.ghs.model.timetable</value>         </list>     </property>   </bean>     <bean id="baseDAO"       class="com.example.ghs.dao.BaseDAOImpl"/> </beans> 

My BaseDAO class looks like this

public class BaseDAOImpl implements BaseDAO{ private SessionFactory sessionFactory;   @Autowired  public BaseDAOImpl(SessionFactory sessionFactory){      this.sessionFactory = sessionFactory;  }   @Override  public Session getCurrentSession(){      return sessionFactory.getCurrentSession();  } } 

The following code throws the exception in the title

public class Main {  public static void main(String[] args){     ClassPathXmlApplicationContext context =             new ClassPathXmlApplicationContext("dao-beans.xml");     BaseDAO bd = (BaseDAO) context.getBean("baseDAO");     bd.getCurrentSession();  } } 

Does anyone have an idea about how to solve this problem?

Answer 1

getCurrentSession() only makes sense inside a scope of transaction.

You need to declare an appropriate transaction manager, demarcate boundaries of transaction and perform data access inside it. For example, as follows:

<bean id = "transactionManager" class = "org.springframework.orm.hibernate4.HibernateTransactionManager">     <property name = "sessionFactory" ref = "sessionFactory" /> </bean> 

.

PlatformTransactionManager ptm = context.getBean(PlatformTransactionManager.class); TransactionTemplate tx = new TransactionTemplate(ptm);  tx.execute(new TransactionCallbackWithoutResult() {     public void doInTransactionWithoutResult(TransactionStatus status) {          // Perform data access here     } }); 

See also:

• 10. Transaction Management
• 13.3 Hibernate

Answer 2

I came across same problem and got solved as below Added @Transactional on daoImpl class

Added trnsaction manager in configuration file:

<tx:annotation-driven/>   <bean id="transactionManager"   class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean>