[HADOOP-13609] Refine credential provider related codes for AliyunOss integration

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: HADOOP-12756
• Fix Version/s: HADOOP-12756
• Component/s: fs, fs/oss
• Hadoop Flags: Reviewed
• Assignee: Genmao Yu
• Reporter: Kai Zheng
• Created: 14/Sep/16 01:21
• Updated: 06/Nov/17 07:53
• Resolved: 19/Sep/16 03:43

Description

looking at the AliyunOss integration codes, some findings:
1. TemporaryAliyunCredentialsProvider could be better named;
2. TemporaryAliyunCredentialsProvider shared many codes with AliyunOSSUtils#getCredentialsProvider, and the dup can be resolved;
3. AliyunOSSUtils#getPassword is rather confusing, as used to get other things than password.