A ClusterView represents the instances of a cluster that are up and running and that all can see each other at a certain point in time.
The discovery service can be used to get the current topology view.
An InstanceDescription represents and contains information about an instance that is part of a TopologyView.
Used to filter InstanceDescriptions in a TopologyView.
A topology view is a cross-cluster list of instances and clusters that have announced themselves with the DiscoveryService.
A topology event is sent whenever a change in the topology occurs.
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