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https://issues.apache.org/jira/browse/FLINK-12367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dominik Wosiński closed FLINK-12367.
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Resolution: Invalid
> Create rich versions of functions for Scala
> -------------------------------------------
>
> Key: FLINK-12367
> URL: https://issues.apache.org/jira/browse/FLINK-12367
> Project: Flink
> Issue Type: Improvement
> Reporter: Dominik Wosiński
> Assignee: Dominik Wosiński
> Priority: Major
>
> Currently for some of the functions like for example _AsyncFunctions_ have
> their rich versions available only for Java, which makes using them more
> complicated to use in Scala. For example using _RichAsyncFunction_ that
> allows state for example requires a lot of changes, since AFAIK it will not
> normally work with _DataStream_ from scala API. This will force user to make
> various changes in the code to be compatible with the API_._ This also
> includes the fact that the variance is different for Scala and Java
> collections, since the former ones are covariant by default and the latter
> ones are invariant by default.
>
>
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