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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5442) Use builder pattern in StoreFile and HFile
Date Thu, 23 Feb 2012 17:30:48 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214868#comment-13214868
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stack commented on HBASE-5442:
------------------------------

@Mikhail Thats the usual set of three that fail on hadoopqa, fyi.
                
> Use builder pattern in StoreFile and HFile
> ------------------------------------------
>
>                 Key: HBASE-5442
>                 URL: https://issues.apache.org/jira/browse/HBASE-5442
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Mikhail Bautin
>            Assignee: Mikhail Bautin
>         Attachments: D1893.1.patch, D1893.2.patch, HFile-StoreFile-builder-2012-02-22_22_49_00.patch
>
>
> We have five ways to create an HFile writer, two ways to create a StoreFile writer, and
the sets of parameters keep changing, creating a lot of confusion, especially when porting
patches across branches. The same thing is happening to HColumnDescriptor. I think we should
move to a "builder pattern" solution, e.g.
> {code:java}
>   HFileWriter w = HFile.getWriterBuilder(conf, <some common args>)
>       .setParameter1(value1)
>       .setParameter2(value2)
>       ...
>       .build();
> {code}
> Each parameter setter being on its own line will make merges/cherry-pick work properly,
we will not have to even mention default parameters again, and we can eliminate a dozen impossible-to-remember
constructors.
> This particular JIRA addresses StoreFile and HFile refactoring. For HColumnDescriptor
refactoring see HBASE-5357.

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