[TAJO-2021] Some refactoring and changing anonymous class to lambda expression

• Type: Task
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.11.0
• Fix Version/s: 0.12.0
• Component/s: Worker
• Assignee: Jongyoung Park
• Reporter: Jongyoung Park
• Created: 14/Dec/15 07:14
• Updated: 15/Dec/15 09:39
• Resolved: 15/Dec/15 06:48

Description

Some instance variables are moved into local variables.
And a few anonymous classes are changed to lambda expressions.

Issue Links

• relates to: TAJO-1969 Replace Anonymous class with Lambda expression