[jira] [Created] (SPARK-4557) Spark Streaming' foreachRDD method should accept a VoidFunction<...>, not a Function<..., Void>

["Alexis Seigneurin (JIRA)" <ji...@apache.org>]

Alexis Seigneurin created SPARK-4557:
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             Summary: 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: Bug
    Affects Versions: 1.1.0
            Reporter: Alexis Seigneurin


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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