Don't quote Rod Johnson bullshit here. In the same book he goes on and basically tells you to not use an ORM software. Don't believe anything he says about data management because he obviously doesn't know what he is talking about. The fact is that instead of asking "Should I have DAOs" you should ask "what are good reasons for using DAOs". Once you have that list in front of you, you can make an informed decision. I have listed common reasons for having (and not having) DAOs in my book. Because it is not a simple list but a whole section, I can't quote it here. Go get the ebook. And yes, I use a DAO-like pattern in my Seam application. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4076365#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...