Re: Application architecture question

@Timea RequestBuilder or RequestFactory.

If you plan on creating a Mobile "Web" App you can def. look at GWT-RPC. However, if you plan on packaging the App to "Native" as part of the dual mode (web-"native"), then avoid if possible GWT-RPC.

Regards,

Alfredo

On Tue, Jun 11, 2013 at 3:41 PM, Imy <timea.turdean@gmail.com> wrote:

Thank you for the so far posted replies.

For maybe further clarify:

• I need this to work only at the start up of the application, to wait till my model has all the data and then update the GUI.
• I am using mGWT, still the architecture is GWT related. I am using mGWT to get it cross-device and GWT to get it cross-browser. (of course with its limitations)
• let's say I can control the RPC calls, what do I do with all the events? Can I control my application only to move on when all the necessary events are done? 

@Alfredo - if not gwt-rpc, then what?

Cheers,

Timea

On 11 June 2013 21:30, Alfredo Quiroga <lawwton@gmail.com> wrote:

And since the last sentence of the original post if my memory serves me right mentions is for a mobile app I would strongly recommend not to use gwt-rpc in this case.

Sent from my iPhone

On Jun 11, 2013, at 3:24 PM, Jens <jens.nehlmeier@gmail.com> wrote:

If you have multiple independent RPC requests and you want to update the GUI after all these RPC requests are done, then you could check a number of boolean variables (one per RPC request) to see if all of them are true ( = RPC is done), e.g.

server.rpcMethod1(Callback() {

  onSuccess() {

    rpcMethod1Done = true;

    maybeUpdateUI();

  }

});

server.rpcMethod2(Callback() {

  onSuccess() {

    rpcMethod2Done = true;

    maybeUpdateUI();

  }

});

private void maybeUpdateUI() {

  if(allRpcDone()) { //check all boolean variables.

    //... update ui

  }

}

But as you have a mobile application its probably better to batch your requests, so that your app, as a rule of thumb, only does one request per screen. This saves a lot of network overhead. In this case a command pattern might be useful, as it allows for easy BatchCommands, e.g.

BatchCommand bc = new BatchCommand();

bc.add(new DoStuff1Command());

bc.add(new DoStuff2Command());

server.execute(bc, Calllback<BatchCommandResult>() {

  //in onSuccess iterate over all individual command results contained in the BatchCommandResult and finally update your UI.

}

Otherwise, if you just have a single RPC request somewhere and you make that RPC request because of an event you probably just need an XyzLoadedEvent, e.g. ScoreBoardRequestEvent and ScoreBoardLoadedEvent, just like Joseph has already explained.

-- J.

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