Question

Prior to Wicket 6 the javascript code returned by IAjaxCallDecorator.decorateScipt was executed immediately after a click. I migrated IAjaxCallDecorator according to the migration-guide.
By clicking 3 times the link within 5 seconds the expected result is:

• getPrecondition
• getPrecondition
• getPrecondition
• getSuccessHandler
• getSuccessHandler
• getSuccessHandler

But the result was:

• getPrecondition
• getSuccessHandler
• getPrecondition
• getSuccessHandler
• getPrecondition
• getSuccessHandler

Use case: Blocking until an Ajax request is complete see http://my.safaribooksonline.com/book/-/9781849511605/deeper-into-ajax/ch07lvl1sec04 (Page 162)

Is there another way to migrate IAjaxCallDecorator to Wicket 6?

public class HomePage extends WebPage {

 public HomePage(final PageParameters parameters) {
  add(new Label("version", getApplication().getFrameworkSettings().getVersion()));

  AjaxLink<Void> blockingLink = new AjaxLink<Void>("blockingLink") {
    @Override
    public void onClick(AjaxRequestTarget target) {
      try {
        Thread.sleep(5000);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
    }
    @Override
    protected void updateAjaxAttributes(AjaxRequestAttributes attributes) {
      super.updateAjaxAttributes(attributes);

      IAjaxCallListener blockingListener = new AjaxCallListener() {
        @Override
        public CharSequence getPrecondition(Component component) {
          return "console.log('getPrecondition');";
        }
        @Override
        public CharSequence getSuccessHandler(Component component) {
          return "console.log('getSuccessHandler');";
        }
      };
      attributes.getAjaxCallListeners().add(blockingListener);
    }
  };
  add(blockingLink);
 }
}

Answer 1

Use case: Blocking until an Ajax request is complete see http://my.safaribooksonline.com/book/-/9781849511605/deeper-into-ajax/ch07lvl1sec04
(Page 162)

@Override
protected void updateAjaxAttributes(AjaxRequestAttributes attributes) {
  super.updateAjaxAttributes(attributes);
  attributes.setChannel(new AjaxChannel("myChannel", AjaxChannel.Type.ACTIVE));
}

did the job. see wicket forum