[jboss-user] [JBoss Seam] - Re: Is it good to code JSP-specific information in EJB??

jazir1979 do-not-reply at jboss.com
Sun May 20 18:53:54 EDT 2007

Hi Alain,

I think that should work using the @DataModelSelection annotation to inject the selected row.

I guess our experiences are different, because I've rarely used existing EJB services written "years before" for a new UI.  But as I said, it's easy to keep this separation, so what is the big deal with having UI concerns in your Seam EJBs?

If you use RichFaces, being able to inject a UI component and manipulate it based on an AJAX-initiated action can be very handy: @In(required = false, value = "#{uiComponent['panel']}")    private UIPanel richPanel;


"hsiung" wrote : hi Daniel,
  | I'm not sure I understand your point. In a matter of facts, actually in most cases I know of, the EJB services are settled. New web applications running on a web container use EJB services already written years before. It would be complicating the architecture to introduce UI concerns in a service layer that is per definition a UI neutral layer. Yes, separating UI concerns from the service layer is a true requirement.
  | I was refering to Pete's statement
  | anonymous wrote : [the tree case] is really the only case when I have to put UI in a component.
  | As I understand his statement, SelectOneRadio (which is NOT a tree) works without putting UI concerns in the EJB layer. I'm sure he is correct. So I simply ask how do SelectOneRadio works without ValueChangeEvent in the EJB, assuming we remove the backing bean in the web container with Seam.
  | Alain

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