Package com.vaadin.collaborationengine
Interface PresenceHandler
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- 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)
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Nested Class Summary
Nested Classes Modifier and Type Interface Description static interface
PresenceHandler.PresenceContext
The context of the user presence.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description Registration
handlePresence(PresenceHandler.PresenceContext context)
Handles a change of user presence in a topic.
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Method Detail
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handlePresence
Registration handlePresence(PresenceHandler.PresenceContext context)
Handles a change of user presence in a topic.- Parameters:
context
- the context of the user presence, notnull
- Returns:
- a registration that will be removed when the user stops being present
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