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From "Phabricator (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2720) Merge MetaStoreListener and HiveMetaHook interfaces
Date Wed, 18 Jan 2012 03:13:46 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phabricator updated HIVE-2720:
------------------------------

    Attachment: HIVE-2720.D1299.1.patch

enis requested code review of "HIVE-2720 [jira] Merge MetaStoreListener and HiveMetaHook interfaces".
Reviewers: JIRA

  HIVE-2720. Merge MetaStoreListener and HiveMetaHook interfaces. First version of the patch

  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.

TEST PLAN
  EMPTY

REVISION DETAIL
  https://reviews.facebook.net/D1299

AFFECTED FILES
  hbase-handler/src/java/org/apache/hadoop/hive/hbase/HBaseStorageHandler.java
  metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaHook.java
  metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaHookLoader.java
  metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java
  metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStoreClient.java
  metastore/src/java/org/apache/hadoop/hive/metastore/MetaStoreEventListener.java
  metastore/src/java/org/apache/hadoop/hive/metastore/MetaStoreEventListenerLoader.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/AddPartitionEvent.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/AlterPartitionEvent.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/AlterTableEvent.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/CreateDatabaseEvent.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/CreateTableEvent.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/DropDatabaseEvent.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/DropPartitionEvent.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/DropTableEvent.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/ListenerEvent.java
  metastore/src/java/org/apache/hadoop/hive/metastore/events/LoadPartitionDoneEvent.java
  ql/src/java/org/apache/hadoop/hive/ql/metadata/DefaultStorageHandler.java
  ql/src/java/org/apache/hadoop/hive/ql/metadata/Hive.java
  ql/src/java/org/apache/hadoop/hive/ql/metadata/HiveStorageHandler.java

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> Merge MetaStoreListener and HiveMetaHook interfaces
> ---------------------------------------------------
>
>                 Key: HIVE-2720
>                 URL: https://issues.apache.org/jira/browse/HIVE-2720
>             Project: Hive
>          Issue Type: Sub-task
>          Components: JDBC, Metastore, ODBC, Security
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>         Attachments: HIVE-2720.D1299.1.patch
>
>
> 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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