Timeout in Vaadin

Félix Sandoval Hernández

Hi,

First of all, sorry for my english isn't good ^_^

I am working on a Vaadin project over a year (excellent framework by the way). I've come from PHP language and there is one thing that I miss (i'm not sure if there is a similar here) and it's the "window.setTimeout".

In php (javascript) I can call a function when passing a time (in milliseconds). There is a way to do this in Vaadin?

In most posts, people attach the timeout with the "session-timeout", but i'm not interested in it :)

I hope you can help me.

Thank you!

Alejandro Duarte

Hi,

You can use ScheduledExecutorService. If you want the scheduled task to update the UI, you need two more things: Enable Push support, and use UI.access():

@Push
public class ExampleUI extends UI {

    ...

    @Override
    protected void init(VaadinRequest request) {

        ...
      
        ScheduledExecutorService executorService = Executors.newScheduledThreadPool(1);
        executorService.schedule(this::showNotification, 5000, TimeUnit.MILLISECONDS);
    }

    private void showNotification() {
        UI.getCurrent().access(() -> {
            Notification.show("It works!");
        });
    }

}

Hope that helps :)

Félix Sandoval Hernández

Yeah, it works! This is exactly what I was looking for.

Thank you very much :)

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Timeout in Vaadin

Vaadin lets you build secure, UX-first PWAs entirely in Java.
Free ebook & tutorial.