How to update a window content from server side

Vaadin 6 / 7 / 8 Framework UI
1

I searched the forum and didn’t find a posting on this. Can someone point me to a method to update window content after it is posted on client side? The usecase is, I display a panel, then without any user action (push button etc.), I want to update the content of this panel or close it from server side, all based on decision made on server side. Is this possible?
Thanks.

2

See
Server Push
 and
Updating UI from another thread
.

3

Agata: Thank you for the respond. I forgot to mention I am limited to use vaadin 6 right now. Does server push add-on work in v6? The “Updating UI from another thread” link also mentioned about a client pulling method via some refresher component. Is the refresher component available in vaadin 6? Thanks.