com.vaadin.flow.component.

Interface PollNotifier

  • All Superinterfaces:

    Serializable

    All Known Implementing Classes:

    UI, WebComponentUI


    public interface PollNotifier
extends Serializable

    The interface for adding and removing PollEvent listeners.

    By implementing this interface, a class publicly announces that it is able to send PollEvents whenever the client sends a periodic poll message to the client, to check for asynchronous server-side modifications.

    Since:

    1.0

    See Also:

    UI.setPollInterval(int)

    • Method Detail

      • addPollListener

        default Registration addPollListener(ComponentEventListener<PollEvent> listener)

        Add a poll listener.

        The listener is called whenever the client polls the server for asynchronous UI updates.

        Parameters:

        listener - the listener to add

        Returns:

        a handle that can be used for removing the listener

        See Also:

        UI.setPollInterval(int)