Re: Nested and Tiles taglibs together

[Cedric Dumoulin]

 Hi Chris,

Chris Butler wrote:

So, I've been using struts for a while... even back when Tiles used to
be called "Components". :-)
I'm pretty impressed with how far things have come and how useful the
framework is...
Anyway, I'm new to using <nested> tags and am trying to use them in
combination with Tiles.
The goal I have is to iterate over a bunch of questions, each question
which has its own layout. For now, ignore how the layout switch is
handled - I'm more concerned about passing nested context between tiles
if it's possible.  (I've actually accomplished the switch via a
logic:equals sort of hack for the time being rather than pre-loading any
data in a tiles controller.  Why this works with a tiles:insert, I'm not
sure since one would think it would have flush-from-within-a custom-tile
issues as well.)
First pass (without swapped layout):
<nested:iterate property="questions" scope="request">
   <nested:nest property="question">
       <nested:write property="questionText" /><br />
       <nested:hidden property="questionId" /><br />
          <!-- insert answers here later -->
   </nested:nest>
</nested:iterate>
What I would like to do in concept:
*** questions.jsp
<nested:iterate property="questions" scope="request">
   <tiles:insert attribute="questionLayout" flush="false"/>
</nested:iterate>
*** questionLayout.jsp
<nested:nest property="question">
   <nested:write property="questionText" /><br />
   <nested:hidden property="questionId" /><br />
          <!-- insert answers here later -->
</nested:nest>
Problems I've had:
1. Tiles & flush = "false"
  I'm using JBoss 3.2.0RC1 w/Jetty - the Tiles flush tag doesn't seem 
  to work or Jetty mishandles it.  I know we're fighting against the
JSP 1.1 spec.
  Symptom: The flushed tile HTML appears first, the containing JSP HTML
after
 

 There is a ticket opened in bugzilla for this issue.You can try the 
proposed patch, and vote for it.

2. Losing nested context
  Once I do the tiles:insert, I lose the nested context.  I need to be
able
  to generate the problem index for each question in the form.  This
should
  look something like:
  questions[0].question.questionId="nnnn"
  questions[1].question.questionId="mmmm"
 

 I don't know how nested is implemented, but it looks like it store its 
context in the page scope. Need to be in the request scope to work with 
Tiles

Thoughts:
1. When will Struts move to support JSP 1.2?  It's been around for a
long time now.
  In fact, isn't JSP 1.3 out there as well?
 It is jsp1.2

2. Is there any good documentation on Tiles and Nested in combination?
  So far, I've been to a lot of the struts resources without much luck.
 I don't know about any documentation for Tiles/nested. Any help is 
welcome.

  Cedric

3. I love the concept of Tiles controllers.  These are fantastic for
moving a 
  Tile around a webapp solely by referencing it via the JSP/tiles defs.
Is
  there anyway to leverage this concept in relation to my desired
objectives?

Thanks loads - any tips or even possible approaches would be fantastic.

Chris

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