Reverse RPC calls

[BlackDhalia]

Hi,

I have a GWT application which can call methods from a java server
side app in the GWT server side code, e.g. if I want to get a users
name and address I just make an RPC call to my service on my GWT
server side code which then calls some standard java code in another
project which talks to dB and send me back the data.

What I would like to know though is the syntax for some external Java
code calling my GWT server side code and making a reverse RPC call to
my client. For example, a user has just updated their name and
address and my GWT client side code needs to be notified immediately.

Many thanks.

[Michael Burns]

'Reverse' RPC calls into a GWT client are not possible - what you
could do is provide a refresh button or have your client
poll the server at regular intervals to get the latest data.

[BlackDhalia]

Hi Michael, thanks for your reply. Are you sure there is not a server
push? I though GWT encompassed this. Polling is not really an option
for the kind of application I am creating.

Many thanks.

On 15 Jun, 11:59, Michael Burns <michaelbur...@gmail.com> wrote:
> 'Reverse'RPCcalls into a GWT client are not possible - what you

> could do is provide a refresh button or have your client
> poll the server at regular intervals to get the latest data.
>
> On Jun 15, 11:39 am, BlackDhalia <earthquakena...@gmail.com> wrote:
>
>
>
> > Hi,
>

> > I have a GWT application which cancallmethods from a java server

> > side app in the GWT server side code, e.g. if I want to get a users

> > name and address I just make anRPCcallto my service on my GWT

> > server side code which then calls some standard java code in another
> > project which talks to dB and send me back the data.
>
> > What I would like to know though is the syntax for some external Java
> > code calling my GWT server side code and making areverseRPCcallto
> > my client. For example, a user has just updated their name and
> > address and my GWT client side code needs to be notified immediately.
>

> > Many thanks.- Hide quoted text -
>
> - Show quoted text -

[Reinier Zwitserloot]

Server Push is -extremely- complex.

Read: http://groups.google.com/group/Google-Web-Toolkit/browse_thread/thread/fd724f4099a29251

[j3t]

hi,

jstm4gwt is what you need. it will be released in the near furtue.

~j3t

On 15 Jun., 14:52, Reinier Zwitserloot <reini...@gmail.com> wrote:
> Server Push is -extremely- complex.
>

> Read:http://groups.google.com/group/Google-Web-Toolkit/browse_thread/threa...

[j3t]

jstm4gwt: http://www.gwtwindowmanager.org/jstm/index.html

[Brill]

Server push is not really server push in this case, the client must
still make a request to the server (this is HTTP after all).

There are ways to *reduce* the number of "polls" tot he server but my
understanding is that it can get hairy pretty quick.
Search the form for things like "comet" and s"server push" as there
has been quite a lot of information posted.

- Brill Pappin

[BlackDhalia]

Thanks, Luca Masini's example worked a treat.