how to access DAO

[Mathias Nilsson]

Hi! This is a design question.

I'm using Hibernate and DTO for annotation mapping. I have DAO objects for persistance of these objects. My question is. How should I access the DAO objects.

Should I instantiate the DAO or is there some pattern on how to wrap the DAO?

[dennis zined]

You'll probably have a service layer in your application which you could inject dao components via Spring framework. In your spring config, inject DAOs into your service component and expose service methods to your UI. Your code will probably look like this:

 
public ServiceImpl implements Service {
 
    private DAO dao;
 

    public void persist(Domain domain) {
        dao.persist(domain);
    }
 
    public void setDao(Dao dao) {
        this.dao = dao;
    }
}

hope this helps.

[Mathias Nilsson]

Thank you!

Not to familiar with spring but i'll look into it. To many new framworks for me right now , Wicket, Hibernate, Maven, Struts2 and the list goes on. But I have read about the Service Layer and seems like a good id�.

// Mathias