Question

I’m not sure if this is even possible. It would seem like there would be a way to do this when you click a “submit” button.

private Button getButton(String id) 
{
    return new AjaxButton(id)
    {
            private static final long serialVersionUID = 1L;
            {
                setEnabled(true);
            }

            @Override
            protected void onSubmit(AjaxRequestTarget target, Form<?> form) 
            {
                debug = "Beginning a process....";
                target.addComponent(debugLabel);

                //Perform the first process

                debug = "Beginning second process....";
                target.addComponent(debugLabel);

                //Perform the second process

                debug = "Finishing....";
                target.addComponent(debugLabel);

                //Perform the third process

                debug = "Done.";
                target.addComponent(debugLabel);
            }
            @Override
            protected void onError(AjaxRequestTarget target, Form form)
            {
                //NO-OP
            }
        };
    }
}

If it’s not possible is there an alternative to multiple real-time updates? I want it so there is a status label on the bottom updating and telling you how much progress is done in that one method.

Answer 1

Just use AjaxTimerBehavior, so that it updates your label every 1-2 seconds.

Code:

add(new AbstractAjaxTimerBehavior(Duration.seconds(1))
        {
            @Override
            protected void onTimer(AjaxRequestTarget target)
            {
                target.add(label);
            }
        });

Obviously this solution uses dumb AJAX polling, so it is only advisable to use it on an intranet or other low traffic site.