[YARN-9453] Clean up code long if-else chain in ApplicationCLI#run

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.0
• Labels: newbie
• Assignee: Wanqiang Ji
• Reporter: Szilard Nemeth
• Created: 07/Apr/19 07:15
• Updated: 13/May/19 18:26
• Resolved: 13/May/19 18:14

Description

org.apache.hadoop.yarn.client.cli.ApplicationCLI#run is 630 lines long, contains a long if-else chain and many many conditions.
As a start, the bodies of the conditions could be extracted to methods and a more clean solution could be introduced to parse the argument values.