Progress indicators

Author: Let me introduce you to a friend. ProgressIndicator, reader. Reader, ProgressIndicator.

Author: Now that you know each other, let's work together.

ProgressIndicator: Cool, what's the task to do?

Author: Well, our awesome algorithm is taking too long and users are just leaving our state-of-the-art web application. So ProgressIndicator, we need your help to give the user some feedback about the progress of the process.

ProgressIndicator: Sure.

Author: Thank you sir. Take a look at our original application implementing this Java Thread performing our high-tech algorithm:

public class ProgressindicatorUI extends UI {

  private class HighTechAlgorithm extends Thread {
    public void run() {
      try {
        
        for (int i = 0; i < 10; i++) {
          sleep(1000);
        }

      } catch (InterruptedException e) {
        e.printStackTrace();
      }
    }
  }

  protected void init(VaadinRequest request) {
    final VerticalLayout layout = new VerticalLayout...