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https://issues.apache.org/jira/browse/HDFS-4441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13562932#comment-13562932
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Jing Zhao commented on HDFS-4441:
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The patch looks good to me. Only some minor issues:
1. Maybe Triple, Pair, and Single can be renamed as
DiffUndoInfo/DiffModLineage, SnapshotCopyPair, and PreviousINodeState,
respectively? And maybe Triple and Single can be moved into the Diff class?
2. GetKey seems more like a method name?
3. It would be better to have javadoc in Diff to explain the selection of the
value of DEFAULT_ARRAY_INITIAL_CAPACITY.
> Refactor INodeDirectoryWithSnapshot.Diff as a top level generic class
> ---------------------------------------------------------------------
>
> Key: HDFS-4441
> URL: https://issues.apache.org/jira/browse/HDFS-4441
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: h4441_20130124.patch
>
>
> INodeDirectoryWithSnapshot.Diff is for recording the difference between the
> current state and a previous state of the children list of an INodeDirectory.
> It is easy to refactor the code to support generic lists.
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