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https://issues.apache.org/jira/browse/HBASE-15921?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang updated HBASE-15921:
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    Attachment: HBASE-15921-v2.patch

Finally I decide to use the blocking connection to get region locations but 
still give it an async interface.

And this is only a demo which only support async get. And it is only used to 
show you how to retry with async client, the backoff logic has not been 
implemented yet.

Thanks.

> Add first AsyncTable impl and create TableImpl based on it
> ----------------------------------------------------------
>
>                 Key: HBASE-15921
>                 URL: https://issues.apache.org/jira/browse/HBASE-15921
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Jurriaan Mous
>            Assignee: Jurriaan Mous
>         Attachments: HBASE-15921-v2.patch, HBASE-15921.demo.patch, 
> HBASE-15921.patch, HBASE-15921.v1.patch
>
>
> First we create an AsyncTable interface with implementation without the Scan 
> functionality. Those will land in a separate patch since they need a refactor 
> of existing scans.
> Also added is a new TableImpl to replace HTable. It uses the AsyncTableImpl 
> internally and should be a bit faster because it does jump through less hoops 
> to do ProtoBuf transportation. This way we can run all existing tests on the 
> AsyncTableImpl to guarantee its quality.



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