[HADOOP-10659] Refactor AccessControlList to reuse utility functions and to improve performance

• Type: Sub-task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.5.0
• Component/s: security
• Target Version/s: 2.5.0
• Hadoop Flags: Reviewed
• Assignee: Benoy Antony
• Reporter: Benoy Antony
• Created: 03/Jun/14 20:14
• Updated: 03/Sep/14 20:36
• Resolved: 23/Jun/14 23:16

Description

Minor improvements can be done on AccessControlList.

Code Reusability:
AccessControlList sanitizes the input list to remove duplicate entries, trim entries. StringUtils.getTrimmedStringCollection can be used in this case.

Performance:
AccessControlList uses TreeSet to maintain set of users and groups.
HashSet improves the performance slightly.

Issue Links

• relates to: HADOOP-10652 Refactor Proxyusers to use AccessControlList