http://issues.appfuse.org/browse/APF-186
On 7/2/07, jiangshachina <[EMAIL PROTECTED]> wrote:
Hello, I just be curious with the matter, anybody can give me some explanation? Thanks! a cup of Java, cheers! Sha Jiang jiangshachina wrote: > > I'm new to AppFuse, and want to use AppFuse 1.9.4 > (Webwork+Spring+Hibernate). > > UserDao interface extends Dao interface, and BaseDaoHibernate implements > Dao. > In my mind, since BaseDaoHibernate implements CRUD operations (yes, the > javadoc said the same), > then the class would be reused by other Dao classes, like > UserDaoHibernate. > But I don't find any usage of BaseDaoHibernate in UserDaoHibernate > directly. > I may be wrong, because UserDaoHibernate extends BaseDaoHibernate, then > the former is using the latter. > But now that, for example, BaseDaoHibernate has provided method > getObject(Class clazz, Serializable id), > which really uses Spring's templete methods, > why don't BaseDaoHibernate directly use the method to implements its own > method getUser(Long userId)? > In fact, getUser(Long userId) method still uses Spring's templet method > directly to do CRUD operations. > I just think we may composite BaseDaoHibernate in others DAOs, like > converting > User user = (User) getHibernateTemplate().get(User.class, userId) > to > User user = (User) dao.getObject(User.class, userId), > dao is an instance of Dao/BaseDaoHibernate, also is a field in > UserDaoHibernate. > > As above, my main puzzle is that: in the case, is BaseDaoHibernate needed? > > I have the same trouble on BaseService (Manager & BaseManager) > and other Services (e.g. UserManager & UserManagerImpl). > > Additionally, BaseManager has a protected field "dao", > I think that means we can use the dao in BaseManager's subclasses, > but actually, the variable "dao" is hidden by subclasses's field "dao". > That means we cannot use super-dao in sub-managers. > So I'm also very curious that why AppFuse give the pattern? > > Thanks in advance! > > a cup of Java, cheers! > Sha Jiang > -- View this message in context: http://www.nabble.com/Puzzles-on-DAO---Service-layer--tf4009640s2369.html#a11404476 Sent from the AppFuse - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
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