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From "Tathagata Das (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-4557) Spark Streaming' foreachRDD method should accept a VoidFunction<...>, not a Function<..., Void>
Date Wed, 18 Nov 2015 20:11:11 GMT

     [ https://issues.apache.org/jira/browse/SPARK-4557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tathagata Das updated SPARK-4557:
---------------------------------
    Target Version/s:   (was: 2.0.0)

> Spark Streaming' foreachRDD method should accept a VoidFunction<...>, not a Function<...,
Void>
> -----------------------------------------------------------------------------------------------
>
>                 Key: SPARK-4557
>                 URL: https://issues.apache.org/jira/browse/SPARK-4557
>             Project: Spark
>          Issue Type: Improvement
>          Components: Streaming
>    Affects Versions: 1.1.0
>            Reporter: Alexis Seigneurin
>            Assignee: Bryan Cutler
>            Priority: Minor
>              Labels: starter
>             Fix For: 1.6.0
>
>
> In *Java*, using Spark Streaming's foreachRDD function is quite verbose. You have to
write:
> {code:java}
>                 .foreachRDD(items -> {
>                     ...;
>                     return null;
>                 });
> {code}
> Instead of:
> {code:java}
>                 .foreachRDD(items -> ...);
> {code}
> This is because the foreachRDD method accepts a Function<JavaRDD<...>, Void>
instead of a VoidFunction<JavaRDD<...>>. This would make sense to change it to
a VoidFunction as, in Spark's API, the foreach method already accepts a VoidFunction.



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