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From "Bill Graham (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3880) Make mapper function in ImportTSV plug-able
Date Wed, 18 May 2011 21:40:48 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13035707#comment-13035707

Bill Graham commented on HBASE-3880:

Sounds good, I'm working on the following changes to {{TsvImporter}}:

* Make {{TsvImporter}} an outer class and rename it to {{TsvImporterMapper}}.
* Change the {{setup}} method to public from protected.
* Expose getters for {{ts}}, {{skipBadLines}} and {{badLineCount}}.
* Add {{incrementBadLineCount(int count)}} method.

I should have a patch ready soon unless there are other suggestions/comments. For now I was
going to leave the {{TsvParser}} as an inner class, unless anyone things that would be useful
as well.

> Make mapper function in ImportTSV plug-able
> -------------------------------------------
>                 Key: HBASE-3880
>                 URL: https://issues.apache.org/jira/browse/HBASE-3880
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Bill Graham
>            Assignee: Bill Graham
>         Attachments: HBASE-3880_1.patch
> It would be really useful to allow the ability to specify a different Mapper for the
{{ImportTsv}} class to use than the current {{TsvImporter}}. This would allow transformations
to be made on the input data before being added to HBase. One suggestion is to add a new command
line option to specify a user defined mapper (UDM?). Or maybe instead we just refactor it
to be extended where a subclass can specify a new mapper.
> The mapper is statically defined and bound to the job though, so I'm not sure of the
best way to make it dynamically plug-able. Suggestions welcome.

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