Package com.vaadin.collaborationengine

Interface PresenceHandler

All Superinterfaces:

Serializable

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface PresenceHandler
extends Serializable

Functional interface that defines how to handle user presence changes in a topic.

Since:

4.0

Author:

Vaadin Ltd

See Also:

• PresenceManager.setPresenceHandler(PresenceHandler)

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	PresenceHandler.PresenceContext	The context of the user presence.

Method Summary

Modifier and Type	Method	Description
Registration	handlePresence(PresenceHandler.PresenceContext context)	Handles a change of user presence in a topic.

Method Details

handlePresence

Registration handlePresence(PresenceHandler.PresenceContext context)

Handles a change of user presence in a topic.

Parameters:

context - the context of the user presence, not null

Returns:

a registration that will be removed when the user stops being present