[FLINK-11731] Make DefaultOperatorStateBackend follow the builder pattern

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Implemented
• Fix Version/s: 1.8.0
• Component/s: Runtime / State Backends
• Labels: pull-request-available
• Assignee: Yu Li
• Reporter: Yu Li
• Created: 22/Feb/19 18:25
• Updated: 05/Mar/19 15:34
• Resolved: 05/Mar/19 15:34

Description

This subtask is to introduce a builder for DefaultOperatorStateBackend and move all necessary initialization work including restore operation to the building process.

Issue Links

• links to: GitHub Pull Request #7899