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https://issues.apache.org/jira/browse/ZOOKEEPER-778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884625#action_12884625
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Hudson commented on ZOOKEEPER-778:
----------------------------------
Integrated in ZooKeeper-trunk #864 (See
[http://hudson.zones.apache.org/hudson/job/ZooKeeper-trunk/864/])
> ability to add a watch on a setData or create call
> --------------------------------------------------
>
> Key: ZOOKEEPER-778
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-778
> Project: Zookeeper
> Issue Type: Improvement
> Components: c client, java client, server
> Reporter: Woody Anderson
> Priority: Minor
>
> It is often desirable to set a watch when creating a node or setting data on
> a node. Currently, you have to add a watch after the create/set with another
> api call, which incurs extra cost, and a window of unobserved state change.
> This would "seem" to be an easy addition to the server/client libs, but i'm
> not sure if there are reasons this was never proposed or developed.
> I currently am most concerned with a data watch in these two scenarios, but i
> would imagine other users might be interested in registering a children watch
> immediately upon creation.
> This change would require adding new method signatures in the clients for
> create and setData which took watchers. And some changes to the protocol, as
> the SetDataRequest and CreateRequest objects would need watch flags.
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