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https://issues.apache.org/jira/browse/HIVE-2720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13187362#comment-13187362
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Enis Soztutar commented on HIVE-2720:
-------------------------------------
MetaStoreListener.onXXX() methods take an Event object to wrap the function
call context, however HiveMetaHook functions does not. We can do either way,
but the first one will introduce a lot of classes (50+) in case we do add
corresponding methods.
Since we want both preXXX() and onXXX() methods, we can do smt like:
preXXX() takes normal function args + context (containing back pointer to
handler)
onXXX() takes normal function args + returned object + context (containing back
pointer to handler + method status)
Anyone care to comment ?
> 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
>
> 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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