[HADOOP-13010] Refactor raw erasure coders

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 3.0.0-alpha1
• Target Version/s: 3.0.0-alpha1
• Hadoop Flags: Reviewed
• Assignee: Kai Zheng
• Reporter: Kai Zheng
• Created: 09/Apr/16 11:48
• Updated: 26/May/16 05:35
• Resolved: 26/May/16 05:29

Description

This will refactor raw erasure coders according to some comments received so far.

• As discussed in HADOOP-11540 and suggested by cmccabe, better not to rely class inheritance to reuse the codes, instead they can be moved to some utility.
• Suggested by jingzhao somewhere quite some time ago, better to have a state holder to keep some checking results for later reuse during an encode/decode call.

This would not get rid of some inheritance levels as doing so isn't clear yet for the moment and also incurs big impact. I do wish the end result by this refactoring will make all the levels more clear and easier to follow.

Issue Links

• relates to: HADOOP-13061 Refactor erasure coders