On 7 Apr, 00:57, asif11 <[email protected]> wrote:
> Thanks for the feedback Gabriel but this is GWT code and further is
> making multiple calls to the server. For each of your GWT calls you
> get a single callback. I am looking for a single call from the GWT
> client to result in several calls back. E.g. The server remembers some
> state and calls back with further data.
>
> Maybe you can think of an easier way to do this ?
Due to the way HTTP works, this is hard to do - HTTP is stateless, and
your backend is not geared to "remember" where to put data, after the
first request/response is done. Also, you might run into other issues
with closed ports, firewalls, and so on. What you seem to be needing
is either a stateful protocol (telnet?) or a solution as Garbriel
pointed out above. Remember, you dont really need to use much traffic
to poll for changes on the server. Also, it's a bit easier to manage
state, when only the client needs to keep track of it.
> Cheers.
>
> On Apr 6, 9:04 pm, Gabriel Ernesto Gutierrez Añez
>
> <[email protected]> wrote:
> > well it shouldn't be that hard.
>
> > i've made it using somehing like this
>
> > private int i = 0;
>
> > private AsyncCallback call = new AsynCallback(){
> > public void onFailre(Throwable){...}
> > public void onSuccess(Object o){
> > if(++i < 4){
> > processResult(o);
> > init();
> > }
> > }
>
> > }
>
> > public void init(){
> > myservice.doOperation(call);
>
> > }
>
> > in this case the init() method gets called at the constructor, so when the
> > operation ends at server it came back at the onSuccess part and then I add
> > one to the variable, and then call it again if required.
>
> > you might want to return some boolean value witch will tell you wheather you
> > run the process again or not.
>
> > If you could post some of the client-side code to check what are u doing
> > would be nice.
>
> > Hope it helps,
>
> > _____________________
> > Ing. Gabriel Gutiérrez
> > Celular: +52 1 81 1071 7213
> > Oficina: +52 81 8153 2415
> > Monterrey, México
>
> > On Mon, Apr 6, 2009 at 11:44 AM, asif11 <[email protected]> wrote:
>
> > > Hi,
>
> > > I am trying to get my server code to call my GWT code multiple times.
> > > e.g.
>
> > > 1. GWT GUI Code calls GWTAsynInterface.
> > > 2. GWTAsynInterface calls JavaServerCode.
> > > 3. GWTAsynInterface completes call and returns to GWT GUI Code.
> > > 4. JavaServerCode calls GWT GUI Code again.
>
> > > Step 1 to 3 are standard and work fine. But step 4 is what I need to
> > > do.
>
> > > My scenario is to do with Paginated Data. e.g. GUI calls db for 100
> > > rows. Server returns 25 rows at a time. I am fine with the server
> > > class being somewhat stateful.
>
> > > Any suggestions ?
>
> > > Cheers.
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