[jira] [Commented] (FLINK-7900) Add a Rich KeySelector

["Aljoscha Krettek (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-7900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16216616#comment-16216616 ] 

Aljoscha Krettek commented on FLINK-7900:
-----------------------------------------

What is the extend of this issue? Or better, what does a {{RichKeySelector}} have access to? I'm asking because {{KeySelector}} is a very simple one-method interface right now, which makes it easy for StateBackends and other components to handle them. If they get a lifecycle and access to other components we lose that and I'm not sure who would be responsible for the lifecycle of a {{RichKeySelector}}.

> Add a Rich KeySelector
> ----------------------
>
>                 Key: FLINK-7900
>                 URL: https://issues.apache.org/jira/browse/FLINK-7900
>             Project: Flink
>          Issue Type: Improvement
>          Components: DataStream API
>            Reporter: Hai Zhou UTC+8
>            Assignee: Hai Zhou UTC+8
>            Priority: Critical
>
> Currently, we just have a `KeySelector` Function, maybe we should add a `RichKeySelector` RichFunction, for the user to read some configuration information to build the keySelector they need.



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