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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10916) [VisibilityController] Stackable ScanLabelGenerators
Date Sun, 06 Apr 2014 10:20:19 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13961373#comment-13961373
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Anoop Sam John commented on HBASE-10916:
----------------------------------------

bq.whether we should be calling these "ScanLabelGenerators" or "ScanAuthsGenerators"
+1

> [VisibilityController] Stackable ScanLabelGenerators
> ----------------------------------------------------
>
>                 Key: HBASE-10916
>                 URL: https://issues.apache.org/jira/browse/HBASE-10916
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Assignee: Anoop Sam John
>             Fix For: 0.99.0, 0.98.2
>
>
> The ScanLabelGenerator is used by the VisibilityController to assemble the effective
label set for a user in the RPC context before processing any request. Currently only one
implementation of this interface can be installed, although which implementation to use can
be specified in the site file. Instead it should be possible to stack multiple implementations
of this component the same way we do coprocessors, installed with explicit priority with ties
broken by a counter, where those implementations installed later in the chain have an opportunity
to modify the pending effective label set.



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