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https://issues.apache.org/jira/browse/HBASE-16225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15380007#comment-15380007
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Lars Hofhansl commented on HBASE-16225:
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Yeah... I am guilty for a bunch of the complexity in there. A hierarchy of
filters would be clean; care would have to be taken to keep the current
performance, this is one of the most frequently called code in HBase.
If we can abstract the delete logic, the TTL logic, the delete marker logic,
etc, as each their own filter that might be nice... But it'd be a lot of work.
> Refactor ScanQueryMatcher
> -------------------------
>
> Key: HBASE-16225
> URL: https://issues.apache.org/jira/browse/HBASE-16225
> Project: HBase
> Issue Type: Improvement
> Reporter: Duo Zhang
>
> As said in HBASE-16223, the code of {{ScanQueryMatcher}} is too complicated.
> I suggest that we can abstract an interface and implement several sub classes
> which separate different logic into different implementations. For example,
> the requirements of compaction and user scan are different, now we also need
> to consider the logic of user scan even if we only want to add a logic for
> compaction. And at least, the raw scan does not need a query matcher... we
> can implement a dummy query matcher for it.
> Suggestions are welcomed. Thanks.
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