Thank you for your help!!!
On Apr 16, 5:06 am, Salvador Diaz <[email protected]> wrote:
> If you really really want for some code to be executed when the RPC
> call returns then you're forced to put that code in the onSuccess
> method of your callback, there's no other way around it.
>
> On Apr 15, 10:22 pm, badgerduke <[email protected]> wrote:
>
> > Hello:
>
> > Just started using GWT and I am having difficult tailoring my code to
> > theasynchronousnature of RPC calls. Specifically, my code asks for
> > the results of an RPC call before anything is returned.
>
> > Here is my class which calls a service. Instead of using an inner
> > class for the AsyncCallback, I use a separate implementation,
> > FormAsyncCallback, whose code is also below:
>
> > package com.gallup.client;
>
> > import com.google.gwt.core.client.GWT;
> > import com.google.gwt.user.client.rpc.AsyncCallback;
> > import com.google.gwt.user.client.rpc.ServiceDefTarget;
>
> > public class FormService {
>
> > public String call(FormBean formBean) throws FormException{
>
> > FormRemoteServiceAsync serviceProxy =
> > (FormRemoteServiceAsync)
> > GWT.create(FormRemoteService.class);
> > ServiceDefTarget target = (ServiceDefTarget) serviceProxy;
>
> > String serviceURL = GWT.getModuleBaseURL() + "formservice";
> > if (GWT.isScript()) {
> > serviceURL = "/Struts2GWT/formservice";
> > }
> > target.setServiceEntryPoint(serviceURL);
>
> > final String successMessage = null;
>
> > FormAsyncCallback callback = new FormAsyncCallback();
>
> > serviceProxy.setForm(formBean, callback);
>
> > if (!callback.isHadError()) {
> > GWT.log("AAAAA", null);
> > return callback.getSuccessMessage();
> > }
> > else {
> > throw new FormException(callback.getErrorMessage());
> > }
> > }
>
> > }
>
> > package com.gallup.client;
>
> > import com.google.gwt.core.client.GWT;
> > import com.google.gwt.user.client.rpc.AsyncCallback;
>
> > public class FormAsyncCallback implements AsyncCallback {
>
> > private String successMessage = null;
> > private boolean hadError = false;
> > private String errorMessage = null;
>
> > public void onFailure(Throwable t) {
> > hadError = true;
> > GWT.log("BBBBBBBB", null);
> > errorMessage = t.getMessage();
> > }
>
> > public void onSuccess(Object result) {
> > GWT.log("CCCCCCCCC", null);
> > successMessage = (String) result;
>
> > }
>
> > public String getSuccessMessage() {
> > return successMessage;
> > }
>
> > public boolean isHadError() {
> > return hadError;
> > }
>
> > public String getErrorMessage() {
> > return errorMessage;
> > }
> > public boolean isReturned() {
> > return returned;
> > }
>
> > }
>
> > My problem is that "AAAAAAA" always prints before "BBBBB" or
> > "CCCCCCC". I really want my code to wait for the RPC call to return
> > before I interrogate the results. Does anybody have suggestions?
>
> > Thanks
> > Eric
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