RE: Pulling Punches

[Frank Zammetti]

I don't know if it's the recommended solution (I would expect not), but one 
option is to instantiate your own instance of Action A and call execute() on 
it before returning your ActionErrors.  The caveat there is that you won't 
have the form or the response object available to pass to it, and the 
ActionMapping will not be the right one, so obviously if the Action makes 
use of any of those things, this won't work.  However, I find that people 
generally tend to forget that Actions are just classes with a method you can 
call yourself at any time, and in some cases this is quite sufficient.

Frank

From: "Joe Hertz" <[EMAIL PROTECTED]>
Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
To: "'Struts Users Mailing List'" <[EMAIL PROTECTED]>
Subject: RE: Pulling Punches
Date: Mon, 21 Jun 2004 20:49:18 -0400
> This is not a great solution, for all the reasons that action
> chaining is considered dangerous.  After the validation fails, Struts
> would begin an entire re-execution of the RequestProcessor chain, and
> the archives have plenty of discussion on why that's unpredictable
> and worth avoiding.
Joe-
Not to change the subject *too* much, but what is the recommended way of
handling following case:
User clicks a button causing Action A to fire. Brings him to a page with
data it needs (say for a dropdown box).
User submits form on this page, causing Action B to fire with
validation. Validation fails, bringing him back to page with dropdown
box. Since Action A did NOT fire, dropdown box isn't populated.
Short of sticking that data into a session, what is the way one should
handle this?
An "action chain" like I described is what Andrew Hill suggested to me
on this list, and nobody screamed :-)

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