Examples of com.google.gwt.user.client.rpc.AsyncCallback

com.google.gwt.user.client.rpc.AsyncCallback
always safe to downcast to the known return type. Shape[] shapes = (Shape[]) result; controller.processShapes(shapes); } public void onFailure(Throwable caught) { // Convenient way to find out which exception was thrown. try { throw caught; } catch (IncompatibleRemoteServiceException e) { // this client is not compatible with the server; cleanup and refresh the // browser } catch (InvocationException e) { // the call didn't complete cleanly } catch (ShapeException e) { // one of the 'throws' from the original method } catch (DbException e) { // one of the 'throws' from the original method } catch (Throwable e) { // last resort -- a very unexpected exception } } });

   }


   /** Now lets actually go to the server, using a callback - its called Ajax for a reason ! */
   private void askServer(String text)
   {
      getService().askIt(text, new AsyncCallback() 
      {
         public void onFailure(Throwable t)
         {
            Window.alert(t.getMessage());
         }

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        keepAlive = true;


        alert("received callback for (" + topicName + "," + data + ")");


        if (callbacks.containsKey(topicName)) {
            AsyncCallback callback = (AsyncCallback) callbacks.get(topicName);


            try {
                Object dataToSend = data;


                if (data.startsWith("$JSONSTART$") && data.endsWith("$JSONEND$")) {
                    dataToSend = JSONParser.parse(data.substring("$JSONSTART$".length(), data.length() - "$JSONEND$".length()));
                }


                callback.onSuccess(dataToSend);
            } catch (JSONException e) {
                callback.onFailure(e);
            }
        } else {
            alert("received event for a not subscribed topic: '" + topicName + "'");
            alert("current topics are: " + callbacks.keySet());
        }

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    // Set "loading" status
    status.setText(FrameworkLocale.messages().loading());
    setButtonsEnable(false);


    // Loading data row
    rowLoader.GetData(new AsyncCallback() {


      public void onFailure(Throwable caught) {
        if (!isHidden()) {
          status.setText(FrameworkLocale.messages().error());
          throw new AsyncCallbackFailureException(FrameworkLocale

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      // Here we can add empty row for nice data loading visualisation.
    }
    
    showStatusPanel(FrameworkLocale.messages().loading());
    
    dataSource.selectCount(params, new AsyncCallback() {
      public void onFailure(Throwable caught) {
        if (!parentWindow.isHidden()) {
          pager.setErrorMessage(FrameworkLocale.messages().asyncerror_loadrowscount());
          throw new AsyncCallbackFailureException(FrameworkLocale.messages().asyncerror_loadrowscount(), caught);
        }
      }
      public void onSuccess(Object result) {
        if (!parentWindow.isHidden()) {
          pager.setTotalCount(((Integer)result).intValue());
          pager.refresh();
        }
      }
    });
    
    dataSource.select(params,  new AsyncCallback() {
      public void onFailure(Throwable caught) {
        if (!parentWindow.isHidden()) {
          showStatusPanel((FrameworkLocale.messages().asyncerror_loadrows()));
          throw new AsyncCallbackFailureException(FrameworkLocale.messages().asyncerror_loadrows(), caught);
        }

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  public RemoteLogger() {
    service = (RemoteLoggerServiceAsync) GWT.create(RemoteLoggerService.class);
    final ServiceDefTarget target = (ServiceDefTarget) service;
    target.setServiceEntryPoint(GWT.getModuleBaseURL() + "gwt-log");


    callback = new AsyncCallback() {
      public void onFailure(Throwable ex) {
        if (failure == null) {
          failure = new RuntimeException(
              "Remote logging will be suspended due to communication failure with "
                  + GWT.getTypeName(service) + " at " + target.getServiceEntryPoint(), ex);

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        Context.getInstance().addDetailExecution("Seteando atributos previos para el reporte 2");
        params.putAll(Context.getInstance().getTaskGrid().getStore().getLoadConfig().getProperties());
        Context.getInstance().addDetailExecution("Invocando servicio setea atributos para el reporte");
        params.put(ServiceNameConst.SERVICIO, ServiceNameConst.SET_PARAMS_ON_SESSION);
        DispatcherUtil.getDispatcher().execute(params, new AsyncCallback() {


          @Override
          public void onFailure(Throwable caught) {
            DialogFactory.error("Fallo intentando setear informacion para el reporte.");
          }

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        Context.getInstance().addDetailExecution("Seteando atributos previos para el reporte 2");
        params.putAll(Context.getInstance().getTaskGrid().getStore().getLoadConfig().getProperties());
        Context.getInstance().addDetailExecution("Invocando servicio setea atributos para el reporte");
        params.put(ServiceNameConst.SERVICIO, ServiceNameConst.SET_PARAMS_ON_SESSION);
        DispatcherUtil.getDispatcher().execute(params, new AsyncCallback() {


          @Override
          public void onFailure(Throwable caught) {
            DialogFactory.error("Fallo intentando setear informacion para el reporte.");
          }

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    Context.getInstance().addDetailExecution("ObjectiveWindow 10");
    fldUser.setStore(new ListStore<ModelData>());
    Map params = new HashMap<String, String>();
    params.put(ServiceNameConst.SERVICIO, ServiceNameConst.LIST_USERS);
    DispatcherUtil.getDispatcher().execute(params,
        new AsyncCallback() {


          @Override
          public void onFailure(Throwable caught) {
            Context.getInstance().addDetailExecution("ObjectiveWindow 11");
            Info.display(

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  public void desbloquear() {
    if (actual != null) {
      Map params = new HashMap<String, String>();
      params.put(ParamsConst.ID, actual.get(ParamsConst.ID));
      params.put(ServiceNameConst.SERVICIO, ServiceNameConst.UNLOCK);
      DispatcherUtil.getDispatcher().execute(params, new AsyncCallback() {


        @Override
        public void onFailure(Throwable caught) {
          DialogFactory
              .error("No se ha podido desbloquear el objetivo.");

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    fldUser.setFieldLabel("Responsable");
    fldUser.setEnabled(Boolean.FALSE);
    fldUser.setStore(new ListStore<ModelData>());
    Map params = new HashMap<String, String>();
    params.put(ServiceNameConst.SERVICIO, ServiceNameConst.LIST_USERS);
    DispatcherUtil.getDispatcher().execute(params, new AsyncCallback() {


      @Override
      public void onFailure(Throwable caught) {
        Context.getInstance().validateUserExpired(caught);
        DialogFactory

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