[HBASE-10693] Correct declarations of Atomic* fields from 'volatile' to 'final'

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.98.1, 0.99.0
• Component/s: io, master
• Hadoop Flags: Reviewed
• Assignee: Honghua Feng Assign to me
• Reporter: Honghua Feng
• Created: 06/Mar/14 05:38
• Updated: 21/Feb/15 23:31
• Resolved: 06/Mar/14 21:50

Description

By checking the usage of these Atomic* fields, they themselves don't change once being assigned to referencing an Atomic* object, so 'final' rather than 'volatile' is more proper.
On the other hand, the 'value' encapsulated in Atomic* is already declared 'volatile', which guarantees to perform correctly in multi-threads scenarios.