RE: General Action Question

[Jim Barrows]

> -Original Message-
> From: Brandon Mercer [mailto:[EMAIL PROTECTED]
> Sent: Monday, January 10, 2005 11:06 AM
> To: user@struts.apache.org
> Subject: General Action Question
> 
> 
> Hello Group,
> I'm reading an off the shelf book about DynaActionForms and 
> I've got a 
> question about best practice stuff.  In this book it says 
> that you need 
> to create an Action to work with the info you got much the 
> same as the 
> ActionForm you typically use.  In my previous work I've 
> always just sent 
> the request into my 'data' class to pull info from and send 
> it into the 
> database.  Let me send some code snippets:
>String action = request.getParameter("action");
>  AssetData.addAsset(request, session, 
> getDataSource(request,"trustmaster"));
> 
> So if I'm sending the request and working with that, is there 
> a need to 
> parse the DynaActionForm using:
> 
>DynaActionForm lookupForm = (DynaActionForm) form;
>String symbol = (String)lookupForm.get("symbol");

Yes, in general your data class has absolutely no need to know about a request, 
so you would normally copy the ActionForm into a Data Transfer Object, and pass 
that to your data layer.
So, you would do this:
DynaActionFrom lookupForm = (DynaActionForm)form;
BeanUtils.copyProperties( lookupDto, lookupForm);
AssetData.addAsset( lookupDto);

This allows you to cleanly seperate the UI from your backend code.

> 
> Specifically, I want to know if I'm validating the input in 
> both cases, 

Depends... with the default struts valiation is being done before you get to 
the action class.


> and inserting the entire request into the database (after I parse out 
> each value) if I need to use the second example to work with 
> DynaActionForms.  I'm using multi-page forms, but I insert the values 
> into the JSP page for each new page in the wizard.  Thanks 
> for any help, 
> as I'm "fresh" with struts. Brandon Mercer
> 
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General Action Question

[Brandon Mercer]

Hello Group,
I'm reading an off the shelf book about DynaActionForms and I've got a 
question about best practice stuff.  In this book it says that you need 
to create an Action to work with the info you got much the same as the 
ActionForm you typically use.  In my previous work I've always just sent 
the request into my 'data' class to pull info from and send it into the 
database.  Let me send some code snippets:
  String action = request.getParameter("action");
AssetData.addAsset(request, session, 
getDataSource(request,"trustmaster"));

So if I'm sending the request and working with that, is there a need to 
parse the DynaActionForm using:

  DynaActionForm lookupForm = (DynaActionForm) form;
  String symbol = (String)lookupForm.get("symbol");
Specifically, I want to know if I'm validating the input in both cases, 
and inserting the entire request into the database (after I parse out 
each value) if I need to use the second example to work with 
DynaActionForms.  I'm using multi-page forms, but I insert the values 
into the JSP page for each new page in the wizard.  Thanks for any help, 
as I'm "fresh" with struts. Brandon Mercer

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