hibernate not updating in spring mvc

Question

i have a problem that my project is based on spring mvc integrated with hibernate.in this update is not working.. dao

   @Override
        public void updateAuditorium(Auditorium auditorium) {
        openSession().update(auditorium);
    }

service

@Transactional
    public void update(Auditorium auditorium) {
    auditoriumDAO.updateAuditorium(auditorium);

    }

configuration

<beans:bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <beans:property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <beans:property name="url" value="jdbc:mysql://localhost:3306/auditoriumbooking" />
        <beans:property name="username" value="root" />
        <beans:property name="password" value="root" />
    </beans:bean>

    <!-- Hibernate 4 SessionFactory Bean definition -->
    <beans:bean id="hibernate4AnnotatedSessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <beans:property name="dataSource" ref="dataSource" />
        <beans:property name="packagesToScan">
            <beans:list>
                <beans:value>com.company.product.model</beans:value>
            </beans:list>
        </beans:property>
        <beans:property name="hibernateProperties">
            <beans:props>
                <beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect
                </beans:prop>
                <beans:prop key="hibernate.show_sql">true</beans:prop>
            </beans:props>
        </beans:property>
    </beans:bean>

After function executed noting happend.

Answer 1

All the insert/ update functions must be within a transaction

    Session session = sessionFactory.openSession();
    Transaction tx = session.beginTransaction();

    //update/insert operations here

    session.update(auditorium);

    tx.commit();

    session.close();

If you are handling the session bu yourself ( factory.openSession() ), then you can perform read only operations without a transaction. However, if you configure session handling in hibernate configuration file, then hibernate will open and close the session for you and a transaction is required even for read only operations. In that case you have to write factory.getCurrentSession() . The transaction is mandatory because hibernate closes the session automatically when it detects end of a transaction.

Answer 2

Since you are using sessionFactory, you have to use Transaction for db manipulation. You have to create the session, then begin a transaction in the session and do the db manipulation and then save it to the database through committing the transaction

Transaction transaction = null;
Session session = null;
try {
    //create the session object with openSession() and then begin transaction on session         
    session = sessionFactory().openSession();
    transaction = session.beginTransaction();
    session.update(auditorium);
    transaction.commit();

} catch(HibernateException e) {
    transaction.rollback();
} finally {
    session.close();
}

EDIT: After the question edit:

you are using @Trasactional annotation. so you have to create a HibernateTransactionManager bean(if not created already) and use

<tx:annotation-driven/>

Create a HibernateTransactionManager & define <tx:annotation-driven/> in

application-context.xml