Developing application with friend, but ran into a question...
I had this code :
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation">
<value>classpath:hibernate.cfg.xml</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${jdbc.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">create</prop>
</props>
</property>
</bean>
<tx:annotation-driven />
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="dataSource" ref="dataSource" />
<property name="sessionFactory" ref="sessionFactory" />
</bean>
And he removed it all, changed it to:
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="persistenceUnit"/>
<property name="dataSource" ref="dataSource"/>
</bean>
He said, that this is better approach, but did not exactly explain why. Something about not using hibernate directly, does this mean we are not using hibernate at all anymore? Is it really better approach?
DAO changed like this:
I had:
@Autowired
private SessionFactory sessionFactory;
public void addUser(User user) {
sessionFactory.getCurrentSession().save(user);
}
Now is:
@PersistenceContext
private EntityManager entityManager;
public void addUser(User user) {
entityManager.persist(user);
}
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