[RATIS-449] Move the functional interfaces to a new package

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.3.0
• Component/s: util
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 05/Dec/18 22:21
• Updated: 22/Mar/19 05:27
• Resolved: 06/Dec/18 19:33

Description

There are quite a few functional interfaces in org.apache.ratis.util. Let's move them to a new package, say org.apache.ratis.util.function. It would be an analogy to java.util.function.