Refactored AckedClusterStateUpdateTask & co. to remove code repetitions in subclasses #6559
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Made
AckedClusterStateUpdateTask
an abstract class instead of an interface, which contains the common methods.Also introduced the
AckedRequest
interface to mark bothAcknowledgedRequest
&ClusterStateUpdateRequest
so that the different ways of updating the cluster state (with or without aMetaData*Service
) can share the same code.Removed
ClusterStateUpdateListener
as we can just use its base classActionListener
instead.