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From Ted Yu <yuzhih...@gmail.com>
Subject Re: HBase coprocessor callback for comet
Date Tue, 05 Feb 2013 21:55:11 GMT
Please be a little more specific about where the notifications should be

Your custom RegionObserver lives on region server.

I guess you want notifications to be delivered to your client, outside the


On Tue, Feb 5, 2013 at 12:18 PM, Jan Althaus <althausj@gmail.com> wrote:

> Hi,
> I would like to feed a servlet that is serving a long polling request with
> notifications when certain rows in an hbase table change.
> It seems that the best mechanism to achieve this would be to add a custom
> RegionObserver. What I'm unsure about though is how to best issue the
> callback. Does hbase provide an RPC mechanism that I could re-use or should
> I consider this a separate problem entirely? Are there alternative ways to
> get notified of row changes that better handle this problem?
> Thanks!
> Jan

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