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Posted to hdfs-dev@hadoop.apache.org by "Todd Lipcon (Created) (JIRA)" <ji...@apache.org> on 2011/11/17 07:09:51 UTC
[jira] [Created] (HDFS-2560) Refactor BPOfferService to be a static
inner class
Refactor BPOfferService to be a static inner class
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Key: HDFS-2560
URL: https://issues.apache.org/jira/browse/HDFS-2560
Project: Hadoop HDFS
Issue Type: Improvement
Components: data-node
Affects Versions: 0.23.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Currently BPOfferService is a non-static inner class of DataNode. For HA we are adding another inner class inside of this, which makes the scope very hard to understand when reading the code (and has resulted in subtle bugs like HDFS-2529 where a variable is referenced from the wrong scope. Making it a static inner class with a reference to the DN has two advantages: a) scope is now explicit, and b) enables unit testing of the BPOS against a mocked-out DN.
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