95-136-042-源码-Operator-AbstractUdfStreamOperator

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发布时间：2019-02-26

本文共 872 字，大约阅读时间需要 2 分钟。

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???????????operators????????????????????AbstractUdfStreamOperator ??????????????????????????????

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AbstractUdfStreamOperator ? AbstractStreamOperator ?????????? userFunction ?????????????????????????????????

??????????? AbstractStreamOperator ?????AbstractUdfStreamOperator ??? userFunction ???????????????????????? OutputTypeConfigurable ??? setOutputType ???????????????

???????????????????????AbstractUdfStreamOperator ??????????????? userFunction ??????????runtimeContext?????configuration????????? function ? open() ? close() ??????????

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??????????????Topology?????????????????????????????????????????????????????????????????????????????

??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

??? AbstractUdfStreamOperator ???????????????????????????????????????????????????????????????????????

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