[jira] [Updated] (FLINK-8437) SideOutput() API is ambiguous

["Robert Metzger (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-8437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Metzger updated FLINK-8437:
----------------------------------
    Component/s:     (was: Streaming)
                 API / DataStream

> SideOutput() API is ambiguous
> -----------------------------
>
>                 Key: FLINK-8437
>                 URL: https://issues.apache.org/jira/browse/FLINK-8437
>             Project: Flink
>          Issue Type: Improvement
>          Components: API / DataStream
>    Affects Versions: 1.5.0
>            Reporter: Chesnay Schepler
>            Assignee: Chen Qin
>            Priority: Minor
>
> The current API for retrieving Side Outputs is a bit ambiguous. Consider the program below:
> {code:java}
> sideOutput = stream
>     .process(...)
>     .filter(...)
>     .getSideOutput(tag)
> {code}
> This may be the sideOutput of the process function that is passed through the API for convenience, or the sideOutput of the filter function (which would always be empty).
> Given that only process functions can have sideOutputs we may want to change the return type so that getSideOutput can only be called after a process function.



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