Re: RPG and AJAX was->RE: How do I create a web pagethat.... -- WEB400

Joe,

Good points, however in this case I do want the server to validate the
input and in fact return a few extra fields from the server.

Ajax seems to be a possible solution, or perhaps JSF and Java beans.

Thanks,

Charles Wilt
--
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
  

> -----Original Message-----
> From: web400-bounces@xxxxxxxxxxxx 
> [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Joe Pluta
> Sent: Wednesday, April 05, 2006 2:39 PM
> To: 'Web Enabling the AS400 / iSeries'
> Subject: Re: [WEB400] RPG and AJAX was->RE: How do I create a 
> web pagethat....
> 
> AJAX will be the most overused technology for the next 6-12 
> months, until
> people realize that it's just not necessary for the majority of
> applications.  In Charles' case, his initial request was to 
> be able to enter
> items and have them appear on the bottom of the page as he 
> enters each one.
> He didn't say anything about validating the entries, simply 
> keeping track of
> them using a single input field.  This could be done with a 
> very simple fewe
> lines of JavaScript.
> 
> Now, he MIGHT have wanted line by llne validation, but he 
> didn't specify it,
> and yet the immediate answer from some people was to add server-side
> validation via AJAX, without a thought to performance or complexity.
> 
> When you start changing from one web hit for a page to one 
> web hit for every
> field, you're going to find that issues like latency start to 
> become much
> more pronounced.  It's perhaps less of a problem with an Intranet
> application, but if this application is ever meant to go out 
> to slower speed
> connections, then AJAX may not be the idea.
> 
> I'm not against AJAX by any means.  There are applications 
> where it makes
> sense.  The problem is that there are a LOT of issues that 
> need to be dealt
> with, especially when it comes to opening up multiple 
> persistent connections
> to the host. (Oh ho, you say... we don't NEED persistence!  
> Well, if you're
> planning on using any of the capabilities of i5/OS, like 
> library lists and
> security, then you will need persistence of some kind.)
> 
> Anyway, my two cents.  AJAX is a cool technology, but it's 
> not the universal
> panacea, and it's very "coolness" makes it highly susceptible 
> to overuse.
> 
> Joe
> 
> 
> > From: albartell
> > 
> > >Any recommendations on where to start?
> > 
> > If you can wait until the end of the month I have an 
> article coming out in
> > the May issue of iSeries News titled "RPG and Ajax: 
> Together At Last"
> > 
> > It will guide you through the bare bones of AJAX and RPG.  
> The example
> > used
> > in the article is validating an item number and changing 
> the appearance of
> > the page based on the item entered being valid or invalid.
> 
> 
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