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From "Stefan Richter (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-5250) Make AbstractUdfStreamOperator aware of WrappingFunction
Date Mon, 09 Jan 2017 10:18:58 GMT

     [ https://issues.apache.org/jira/browse/FLINK-5250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Stefan Richter updated FLINK-5250:
    Assignee: Stefan Richter

> Make AbstractUdfStreamOperator aware of WrappingFunction
> --------------------------------------------------------
>                 Key: FLINK-5250
>                 URL: https://issues.apache.org/jira/browse/FLINK-5250
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: Aljoscha Krettek
>            Assignee: Stefan Richter
> Right now, when using a {{WrappingFunction}}, as happens for {{WindowFunction}} and also
for some functions in the Scala API then using custom interfaces is not possible. These custom
interfaces are, for example, the checkpointing functions such as {{ListCheckpointed}} and
> We should teach {{AbstractUdfStreamOperator}} about {{WrapingFunction}} so that it can
correctly handle the case where wrapped user functions implement on of these interfaces.
> Also, in the Scala API we have some custom functions that mimic {{WrappingFunction}}
behaviour. These should be moved to use {{WrappingFunction}}, if possible.

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