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https://issues.apache.org/jira/browse/FLINK-10387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yun Tang closed FLINK-10387.
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Resolution: Information Provided
Current method would return {{CheckpointableKeyedStateBackend}} directly.
> StateBackend create methods should return interface not abstract
> KeyedStateBackend classes
> ------------------------------------------------------------------------------------------
>
> Key: FLINK-10387
> URL: https://issues.apache.org/jira/browse/FLINK-10387
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / State Backends
> Affects Versions: 1.6.0
> Reporter: Gyula Fora
> Priority: Not a Priority
>
> Currently the createKeyedStateBackend(...) methods return
> AbstractKeyedStateBackend instead of an interface.
> This makes it virtually impossible to write nice extensions to StateBackends
> that add additional functionality to existing backends while delegating other
> method calls.
> It should be easy enough to add a new interface that extends everything that
> the AbstractKeyedStateBackend does and the method should return that.
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