Merge MetaStoreListener and HiveMetaHook interfaces
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Key: HIVE-2720
URL: https://issues.apache.org/jira/browse/HIVE-2720
Project: Hive
Issue Type: Sub-task
Reporter: Enis Soztutar
Assignee: Enis Soztutar
MetaStoreListener and HiveMetaHook both serve as a notification mechanism for
metastore-related events. The former is used by hcat and the latter is by the
hbase-storage handler, and invoked by the client.
I propose to merge these interfaces, and extend the MetaStoreListener, to add
most of the on- and pre- methods at the Thrift interface. This way, extending
metastore will be easier, and validation, storage-driver notification, and
enforcement can be delegated to individual listeners. Besides, more
functionality can be plugged-in by Hcat at this level.
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