Refactor BlockReader into an interface and implementation
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Key: HDFS-2260
URL: https://issues.apache.org/jira/browse/HDFS-2260
Project: Hadoop HDFS
Issue Type: Improvement
Components: hdfs client
Affects Versions: 0.23.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
For the new block reader in HDFS-2129, or the local block reader in HDFS-347,
we need to be able to support different implementations. This JIRA is to simply
refactor the current BlockReader into an interface and an implementation.
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