How to use DAOs with hibernate/jpa?
- by Ari
Assuming the DAO structure and component interaction described below, how should DAOs be used with persistence layers like hibernate and toplink? What methods should/shouldn't they contain?
Would it be bad practice to move the code from the DAO directly to the service?
For example, let's say that for every model we have a DAO (that may or may not implement a base interface) that looks something like the following:
public class BasicDao<T> {
public List<T> list() { ... }
public <T> retrieve() { ... }
public void save() { ... }
public void delete() { ... }
}
Component interaction pattern is --
service DAO model
