VAADIN 7: What is the simplest way to refresh a Vaadin View in 5 minute intervals?

Question

I'm trying to implement an automatic refresh on a List of components in a Vaadin view. The list gets its contents from a database. I can refresh the list with a button, that is already implemented.

However, I would like to know what is the simplest way to make it so, that this refresh event, that I already have, would automatically refresh in 5 minute (300 000 milliseconds) intervals?

Here's what I tried and it keeps refreshing even after I exit the view so it doesn't really work. I'd like the refresh to happen in 5 minute intervals only while that certain view is being shown.

UI myUI = UI.getCurrent();  

            myUI.setPollInterval(300000);
            myUI.addPollListener(event -> {
                refreshList();
            });

How would I make it so that the refresh doesn't happen after navigating to other views? And is there some simpler way to do this in Vaadin? Thank you

Humiliation

#51795118 – Afrit

Answer 1

You could do so that you call

myUI.setPollInterval(300000);

when the view is activated, and you disable it by calling

myUI.setPollInterval(-1);

when another view is activated. If you use Vaadin Navigator, then you could use ViewChangeListener for handling the polling.

Trimmer

Thank you, I'll try that tomorrow and come back to your answer. We are using Vaadin Navigator. – Humiliation

Does setPollInterval() work globally or locally? Does setPollInterval set this for all session? – Dung

@Dung per connector object. – Afrit