I'm doing this now.  I set the project up this way several months ago and it
works great for me.  The only real con is double compile-time, but I don't
care about that.  I even have a feature where I can show a view of one
application inside another, which is very cool.

Here's how I set it up -- http://zenoconsulting.wikidot.com/blog:16

<http://zenoconsulting.wikidot.com/blog:16>Regards,
Davis

On Sat, Nov 14, 2009 at 8:24 AM, rolf <r...@squarebox.co.uk> wrote:

> What's the best way to create a web app with multiple entry points but
> a lot of common code (eg. common widgets and dialogs) shared between
> them, as well as a common server back end? Currently I'm creating
> multiple modules and multiple HTML pages within a single web app but
> I'm also worried about scalability. The different entry points
> correspond to different workflows depending on what the user is trying
> to do, or perhaps customised versions of the interface for particular
> customers.
>
> I guess I should probably have a single module and top level entry
> point and then switch between interfaces from there but that will
> involve a lot of code refactoring.
>
> -Rolf
>
> On Nov 14, 11:50 am, Sripathi Krishnan <sripathi.krish...@gmail.com>
> wrote:
> > Multiple modules is the wrong way to use GWT.
> >
> > GWT highly recommends using a single module. Most of the performance
> > optimizations GWT does relies on the fact that you have a single,
> monolithic
> > module. Plus, as you observed, the time to build your application keeps
> > growing as you add more modules, so it doesn't scale well.
> >
> > Part of the problem is deciding whether you are building a "Web App" or a
> > "Web Site". Lots of
> > discussions<
> http://www.clyral.com/za/pages/web/website_vs_webapplication.html>can
> > be found on this topic.
> >
> > GWT is great if you want to build a Web App. Typically, there is only a
> > single HTML page, and different "screens" are manipulated on the client
> side
> > using DOM. But if you are building a traditional, multi-page Web Site
> > (nothing wrong with that), then GWT is not for you. You are better off
> using
> > one of the many javascript libraries.
> >
> > So, lets assume you decide you want to build a web-app, and want to use
> GWT
> > to do so. To get started, stick to a single HTML page with a single GWT
> > Module/Entry Point. Adding multiple "screens" is adding a new FlowPanel
> or
> > Composite with your content. Or perhaps, you have all "screens" built
> into
> > the original HTML page, and you just hide/unhide the divs based on user
> > action.
> >
> > The above approach works well if you have a few (say less than 10)
> screens.
> > If your application grows bigger and more complex, you would want to
> start
> > following some established patterns. The MVP pattern has been touted as
> the
> > "way to build web-apps". Just do a google search, there are a lot of
> > articles on that subject. Also, catch Ray Ryan's talk on GWT Architecture
> > and best practices<
> http://code.google.com/events/io/2009/sessions/GoogleWebToolkitBestPr...>.
> >
> > --Sri
> >
> > 2009/11/13 David C. Hicks <dhi...@i-hicks.org>
> >
> >
> >
> > > Specifically, I'm curious about the use of GWT Modules in a project.
> >
> > > Each time we have a new "screen" to create, we have been adding a new
> > > module to our project.  Of course, with each new module, there is an
> > > additional build cycle to generate the Javascript for that module.
>  What
> > > I'm wondering is if this is normal, or does it make more sense to try
> to
> > > build up whole applications in a single module and perhaps keep the
> > > build time down?  Each new module we add appears to increase our build
> > > time by about 1.5 minutes.  It won't be long and this will be way
> beyond
> > > painful.
> >
> > > Any thoughts?
> > > Thanks,
> > > Dave
> >
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