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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7712) Pass ScanType into preCompact()
Date Tue, 29 Jan 2013 23:51:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13565977#comment-13565977
] 

Ted Yu commented on HBASE-7712:
-------------------------------

In RegionCoprocessorHost#preCompact():
{code}
        try {
          scanner = ((RegionObserver)env.getInstance()).preCompact(
              ctx, store, scanner, scanType);
        } catch (Throwable e) {
{code}
We can try calling preCompact() with scanType parameter. If exception is thrown telling us
the method is absent, we can call preCompact() without scanType. However, this is not efficient.
RegionObserver is stateless. So I don't see a way of remembering whether the particular RegionObserver
implements preCompact() with scanType.
                
> Pass ScanType into preCompact()
> -------------------------------
>
>                 Key: HBASE-7712
>                 URL: https://issues.apache.org/jira/browse/HBASE-7712
>             Project: HBase
>          Issue Type: Task
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 0.96.0
>
>         Attachments: 7712-v1.txt
>
>
> See related discussion:
> http://search-hadoop.com/m/a7BYc2RITZ22/Getting+the+scan+type+at+preCompact&subj=Re+Getting+the+scan+type+at+preCompact

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