Provides a map of the previous values of session properties that have changed.
This map will be empty if no session properties were requested or the event did not result in a change of any properties.
This map will only be populated if SessionEvent.type is PROPERTIES or SessionEvent.state is RECONNECTED, FAILED_OVER, or DISCONNECTED.
This will only contain keys that have changed and not the whole required property set.
When a new property is added the value in this map will be
null.
When a property is removed there will be a value in this map but not in SessionEvent.properties.
Provides the reason a session was closed.
If SessionEvent.state is CLOSED this contains the reason the session was closed.
Provides the session's properties.
Only those properties requested when registering the listener will be present in the map.
If no properties were requested or SessionEvent.state is CLOSED the map will be empty.
Provides the session identifier of the client session that the event relates to.
Provides the current state of the session.
Provides the event type.
Convenience method to determine whether the event notifies the opening of a new session.
This is equivalent to:
event.type == Type.STATE && event.state == State.ACTIVE
true if the type is STATE and the state is ACTIVE,
otherwise false
The interface for an event delivered by a SessionEventStream.