RELAY2: notification when a site is up/down on all cluster nodes ---------------------------------------------------------------- Key: JGRP-2303 URL: https://issues.jboss.org/browse/JGRP-2303 Project: JGroups Issue Type: Enhancement Reporter: Bela Ban Assignee: Bela Ban Priority: Minor Fix For: 4.0.20 Provide a callback that's invoked on *all nodes* when a site is up/down, and possibly an initial view of the sites. Could be something like a 'sites view', e.g. \{"LON", "SFO"\}, \{"LON"\}, \{"LON", "SFO", "NYC\} etc