[jira] [Assigned] (BEAM-253) Unify Flink Operator Wrappers

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

     [ https://issues.apache.org/jira/browse/BEAM-253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aljoscha Krettek reassigned BEAM-253:
-------------------------------------

    Assignee: Aljoscha Krettek

> Unify Flink Operator Wrappers
> -----------------------------
>
>                 Key: BEAM-253
>                 URL: https://issues.apache.org/jira/browse/BEAM-253
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-flink
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
>
> Right now, we have {{FlinkAbstractParDoWrapper}} with subclasses {{FlinkParDoBoundWrapper}} and {{FlinkParDoBoundMultiWrapper}} as well as {{FlinkGroupAlsoByWindowWrapper}}. They do essentially the same thing, but slightly differently. The first three are implemented as a {{FlatMapFunction}} while the latter is implemented as a {{StreamOperator}} (which is more low-level and gives access to state and timers and such).
> We should unify this into one wrapper. (With possibly a more concise name...)
> In the process of this we should also make sure that we always use a {{DoFnRunner}} via {{DoFnRunners.createDefault}}. This will help reduce bugs such as [BEAM-241].



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