[jira] [Commented] (FLINK-11729) Make all state backends follow builder pattern

["Yu Li (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-11729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16775487#comment-16775487 ] 

Yu Li commented on FLINK-11729:
-------------------------------

The relative discussion in [PR of FLINK-10043|https://github.com/apache/flink/pull/7674#discussion_r257650293] as a reference.

> Make all state backends follow builder pattern
> ----------------------------------------------
>
>                 Key: FLINK-11729
>                 URL: https://issues.apache.org/jira/browse/FLINK-11729
>             Project: Flink
>          Issue Type: Improvement
>          Components: State Backends, Checkpointing
>            Reporter: Yu Li
>            Assignee: Yu Li
>            Priority: Major
>
> In FLINK-10043 we have introduced builder pattern for {{RocksDBKeyedStateBackend}} and moved all necessary initialization of the backend into the builder, out of which the most important part is the {{restore}} operation. None of the backends could actually supply service before the restore operation is done, so it's native to make restore part of the _building phase_.
> In this JIRA we propose to make all backends follow the builder pattern. More specifically, create builders for {{HeapKeyedStateBackend}} and {{DefaultOperatorStateBackend}} and move their {{restore}} operations into the builders. Will create sub-tasks for each of them. 



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