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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6522) Expose locks and leases to Coprocessors
Date Wed, 08 Aug 2012 01:11:10 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13430790#comment-13430790
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Lars Hofhansl commented on HBASE-6522:
--------------------------------------

BTW. this also came up in an internal Salesforce discussion and we need something the leases
for some internal use cases.
                
> Expose locks and leases to Coprocessors
> ---------------------------------------
>
>                 Key: HBASE-6522
>                 URL: https://issues.apache.org/jira/browse/HBASE-6522
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>         Attachments: 6522-v2.txt, 6522.txt
>
>
> Currently it is not possible for CP to implement any of checkAndMutate type operations,
because coprocessor have no way create a lock, because getLock is private HRegion (interestingly
ReleaseLock is public).
> In addition it would nice if Coprocessor could hook into the RegionServers' Lease management.
> Here I propose two trivial changes:
> # Make HRegion.getLock public
> # Add {code}Leases getLeases(){code} to RegionServerServices (and hence to HRegionServer)

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