[HBASE-7093] Couple Increments/Appends with Put/Delete(s)

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Abandoned
• Affects Version/s: 0.95.2
• Assignee: Unassigned
• Reporter: Varun Sharma
• Created: 03/Nov/12 00:22
• Updated: 14/Jun/22 22:36
• Resolved: 14/Jun/22 22:36

Description

See related issue - https://issues.apache.org/jira/browse/HBASE-4583

Currently, we cannot bundle increment/append with put/delete operations. The above JIRA MVCC'izes the increment/append operations.

One issue is that increment(s)/append(s) are not idempotent and hence repeating the transaction has an associated issue of leading to incorrect value/append results. This could be solved by passing additional tokens as part of the append(s).

One possible high level approach could be:
1) Class IncrementMutation which inherits from Increment and Mutation
2) In the mutateRow call, we add a case for "IncrementMutation" object
3) Factor out the code wrapped inside the "lock and MVCC" from increment() function to internalIncrement.
4) Call internalIncrement from mutateRow and increment()