Rick Reumann wrote:
Dave Newton wrote the following on 7/12/2005 1:57 PM:
Rick Reumann wrote:
For what it's worth, I found a way I can get around passing my
ActionForm to another layer, but in theory, I'm not convinced that
doing so would really mean that I'd be breaking the seperation of
components.
How so? If I have to include the Struts libraries to compile my
business layer (like if I wrote a standalone/non-web client app or
utility, which I do fairly frequently) or mock a Struts object to
test the business layer then they're clearly not separated.
What I'm saying is adding another component that is called from your
Action doesn't mean it's *automatically* the business layer. For
example I have a UIHelper class that I use to get certain things from
the request and session and to certain "View" like things. Just
because it's called from an Action class doesn't mean it's the
business layer.
Of course not. But you just said that you're passing an ActionForm to
another layer--perhaps you consider, as in my example, a utility class
with static factory methods that construct (for example) business
objects from an ActionForm as another layer, but I don't, it's just
glue. If an ActionForm goes directly to a different layer (business,
say) then they're coupled. If the data _in_ an ActionForm goes to the
business layer via a POJO or a helper then it's not coupled: I can still
use by BO in (for example) a non-Struts app w/o any issues whatsoever.
Granted this simple, and I often do like the above, but I don't see it
as 'wrong' if instead you had....
//EmployeeUpdateAction
employeeUIHelper.update( form );
No, in fact, that's exactly right, if you've seen my other post. What's
wrong was the original example I responded to where the constructor of a
business object needed an ActionForm, which automatically couples my
business layer to Struts--this BO is then useless to me in a standalone
application, utility, etc.
Dave
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