Is there a possibility to remove a PollListener in Vaadin 14?
UI.getCurrent().addPollListener(pollEvent -> { refresh(); }
I need to start refreshing, but if the Route or UI is changed, the refreshing has to stop.
Is there a "Vaadin possibility" for that, or do I have to build something on my own?
Thank you!
As noted in the docs, in order to disable polling, one should call
UI.getCurrent().setPollInterval(-1);
In order to ensure that this is called upon navigating away from the view, you can make this call from within a BeforeLeaveObserver. Here is an example:
public class Foo extends Div
implements BeforeLeaveObserver {
@Override
public void beforeLeave(BeforeLeaveEvent event) {
UI.getCurrent().setPollInterval(-1);
}
}
If you want to remove a single poll listener while keeping polling enabled, you can store a reference to the Registration object returned by the addPollListener() method and then call the remove method from the Registration.