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Posted to dev@flink.apache.org by "Stephan Ewen (JIRA)" <ji...@apache.org> on 2018/03/20 20:23:00 UTC

[jira] [Created] (FLINK-9036) Add default value via suppliers

Stephan Ewen created FLINK-9036:
-----------------------------------

             Summary: Add default value via suppliers
                 Key: FLINK-9036
                 URL: https://issues.apache.org/jira/browse/FLINK-9036
             Project: Flink
          Issue Type: Improvement
          Components: State Backends, Checkpointing
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
             Fix For: 1.6.0


Earlier versions had a default value in {{ValueState}}. We dropped that, because the value would have to be duplicated on each access, to be safe against side effects when using mutable types.

For convenience, we should re-add the feature, but using a supplier/factory function to create the default value on access.



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