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From "Anoop Sam John (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5584) Coprocessor hooks can be called in the respective handlers
Date Fri, 16 Mar 2012 04:31:54 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13230890#comment-13230890
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Anoop Sam John commented on HBASE-5584:
---------------------------------------

+1 on additional hooks.
Different usecases can be supported..  As per the need user can use which one they want  :)
Thanks Andrew
                
> Coprocessor hooks can be called in the respective handlers
> ----------------------------------------------------------
>
>                 Key: HBASE-5584
>                 URL: https://issues.apache.org/jira/browse/HBASE-5584
>             Project: HBase
>          Issue Type: Improvement
>          Components: coprocessors
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 0.96.0
>
>
> Following points can be changed w.r.t to coprocessors
> -> Call preCreate, postCreate, preEnable, postEnable, etc. in their respective handlers
> -> Currently it is called in the HMaster thus making the postApis async w.r.t the
handlers
> -> Similar is the case with the balancer.
> with current behaviour once we are in the postEnable(for eg) we any way need to wait
for the main enable handler to 
> be completed.
> We should ensure that we dont wait in the main thread so again we need to spawn a thread
and wait on that.
> On the other hand if the pre and post api is called on the handlers then only that handler
thread will be
> used in the pre/post apis
> If the above said plan is ok i can prepare a patch for all such related changes.

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