Regarding Spring DAO

[Ravi Kiran Va]

Hi ,

I am trying to learn Spring . so please help me


According to the documentation

Spring Framework provides excellent DAO support including TransactionManagement and Exception Handling
With Spring Framework , DAO support is provided for JDBC, Hibernate, iBATIS, Java Data Objects (JDO),

Now i have a query .
For example if i am working with Hibernate then do i need to extend HibernateDAOSuppourt will then only My DAo class will be avialable to Spring Framework otherwise not .

Thanks in advance .

[Eduardo Bueno]

I don't understand your question. HibernateDaoSupport is a class inside Spring ORM package; if you want to use both frameworks, that's the proper way.

[Ravi Kiran Va]

Hey thanks for the response .

Just now i had seen a another example in which the DAOImplementaion class doesn't extend the HibernateDAOSuppourt class .

	public interface InventoryDao 

{
	public void saveInventoryItem(InventoryItem item);
}

public class HibernateInventoryDaoImpl implements InventoryDao 

{
	private SessionFactory sessionFactory;

	public void setSessionFactory(SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
	}

	public void saveInventoryItem(InventoryItem item) {
		getSession().saveOrUpdate(item);
	}
}

This class simply implements the DAO interface .

Please tell me i am getting confused .

[Eduardo Bueno]

This may be also useful to you.

[Ravi Kiran Va]

That was really nice link .Thanks once again .

It clearly shows why to go for Template Less and Template Supppourt of Spring Framework

But i still can't understand one thing here , Templates are providing a lot of benifits like Converting Exceptions (short for try/catch-finally-try/catch) the transaction management and resource management concerns are also addressed .

So keeping so much beneferies in Spring Template why the author itself prefers to go with Direct Hibernate rather than using Template Suppourt .


Thanks in advance .

[Eduardo Bueno]

I can't answer that for you, but I have a theory: although Spring is a huge IoC manager, it is clinging more to the AOP development. That is where use the Session as a Spring proxy is more valuable than use it directly with hibernate.

Anyways, let's hope someone wiser can answer that for us.