[HDFS-9144] Refactor libhdfs into stateful/ephemeral objects

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: HDFS-8707
• Component/s: hdfs-client
• Target Version/s: HDFS-8707
• Assignee: Bob Hansen
• Reporter: Bob Hansen
• Created: 25/Sep/15 11:34
• Updated: 24/Jan/19 10:39
• Resolved: 03/Dec/15 12:34

Description

In discussion for other efforts, we decided that we should separate several concerns:

• A posix-like FileSystem/FileHandle object (stream-based, positional reads)
• An ephemeral ReadOperation object that holds the state for reads-in-progress, which consumes
• An immutable FileInfo object which holds the block map and file size (and other metadata about the file that we assume will not change over the life of the file)

Issue Links

• links to: GitHub Pull Request #43