GWT-RPC no, RequestFactory yes. GWT-RPC services work only with a GWT
client, but the newer RequestFactory has been designed to support
other clients such as Android. You need requestfactory-client.jar
(from the GWT distro) on your classpath. See this presentation from
this year's I/O:
http://www.google.com/events/io/2011/sessions/android-app-engine-a-developer-s-dream-combination.html

If you just want a REST interface, however, you might want to look at
resty-gwt on github, which makes it easy to consume REST services from
a GWT client.

/dmc

On Thu, Jul 21, 2011 at 1:55 PM, fchas <charlesford...@gmail.com> wrote:
> I'd like to understand if or how GWT accepts external RPCs.  I'm
> designing a GWT app right now and I'd like the ability to call the GWT
> app from another application using HTTP.  I want GWT to support CRUD
> operations for my DB and then return an HTTP response.  So in essence
> I want the GWT app to support live users via the UI and a web API
> (REST, perhaps).  Does GWT support this out of the box or is there a
> 3rd party library that's worthy?
>
> thanks in advance!
>
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-- 
David Chandler
Developer Programs Engineer, GWT+GAE
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