Re: UI design and build

[Jon Paris <jon.paris@xxxxxxxxxxxxxx>]

My pleasure sir.


Jon Paris
Jon.Paris@xxxxxxxxxxxxxx



> On May 30, 2025, at 4:23 PM, cesco via MIDRANGE-L <midrange-l@xxxxxxxxxxxxxxxxxx> wrote:
>
> To me the push templating model for ERP style application is one of the most robust and also secure and controllable. The view should have little logic/info as possible (i.e. contrasted with pull model from the view. Think early PHP scripts where the view was mixed with logic, then later replaced in complex system by a templating engine - i.e. a view with placeholder variables and only view logic limited by that what available and sensible in that layer).
> Basically, the business layer exchange a "map" to the view. It's event is like a function call. A PHP to a view template. RPG to DSPF (display or host, since ages). And similar.Performance is not a problem if the view tech just send delta (via JSON, or whatever protocol, let's not get to focused about the proto here... and the state is server side).
> That is the approach followed basically by some "modernization" OA based tools providing access to rich view technology (i.e. the html/js thin client = browser).It is pretty performant from what I've seen (sub 30 ms http request... yep straight Apache on IbmI is pretty performant).No one limit you then in the html/js view space... in putting an iframe rendering a 3D model on a canvas of the view with the id and info from the RPG backend say in a product information page.Or reading a weighting scale via serial , placing the reading on a field that get sent periodically to the IBMi backend.Run whatever js script one likes.But the communication map/protocol between the backend is well defined and reified. I'm talking obviously of ERP/business process workflow, where the user interaction should be efficient and on point (despite "boring" in a useful sense).
>
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