I tried posing this before - no luck - so I am trying again.

I am looking at modifying a (largely) JSF-based web application to use
GWT. I have done some preliminary experiments which have been quite
successful so far - in providing a richer UI and better user
experience.

The main issue that I see at the moment is that the current
application has approx 100 pages of one sort of another (many are
light-weight - but not always simple - 'popup' editor forms for back-
end data).

The structure of the UI - redesigned for GWT - would be a bit
different - making use of being able to dynamically switch page
content - rather than using a reasonably big web page hierarchy.

Given the number of features to migrate - the final structure and
migration path are a bit of a concern.

Common sense suggests that it may not be a good idea to try to produce
a gwt 'monster app' module containing the whole UI - but instead make
it more modular. Current thinking is that the new design should
consist of a number of different pages - each containing the
equivalent functionality of perhaps 5-10 of the original web pages. A
horizontal main menu at the top would allow switching between these
pages - each of which would correspond to a different set of app
functionality - built into a gwt module.

Each gwt 'mini app' module would run on its own web page - so none of
these would be too large - and they could be developed one at a time -
and integrated into the existing app - replacing the corresponding set
of old jsf-based web pages.

I have tested this for two of these 'mini-apps' modules - and it works
quite nicely. The obvious problem going forward is how to track/manage
state in each of these modules when users navigate between them. For
example, the 'current' page might contain a series of trees/tables etc
- and the user navigates away from the web page hosting that app/
module - and then back again - it will not be in the state that he
left it (but in its fresh state).

There are obviously a number of different ways to tackle this (from
client side cookies to server side backing beans, etc) - but is there
a 'proper' way to do it within the context of gwt - ie one that the
gwt framework is designed to support easily ? - I suspect that there
ought to be - but I have only just started with gwt - so not sure
myself.

Any informed opinions would be appreciated.

thx

Andrew
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