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https://issues.apache.org/jira/browse/SPARK-13106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15125598#comment-15125598
]
Saisai Shao commented on SPARK-13106:
-------------------------------------
IIUC, creating direct stream also supports passing {{messageHandler}} from
argument.
{code}
def createDirectStream[
K: ClassTag,
V: ClassTag,
KD <: Decoder[K]: ClassTag,
VD <: Decoder[V]: ClassTag,
R: ClassTag] (
ssc: StreamingContext,
kafkaParams: Map[String, String],
fromOffsets: Map[TopicAndPartition, Long],
messageHandler: MessageAndMetadata[K, V] => R
)
{code}
> KafkaUtils.createDirectStream method with messageHandler and topics
> -------------------------------------------------------------------
>
> Key: SPARK-13106
> URL: https://issues.apache.org/jira/browse/SPARK-13106
> Project: Spark
> Issue Type: Improvement
> Components: Streaming
> Reporter: Luis Alves
> Labels: newbie
>
> Regarding the KafkaUtils.createDirectStream method here:
> https://github.com/apache/spark/blob/master/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaUtils.scala#L473
> I purpose to also allow to pass the a messageHandler as argument instead of
> using the one that is setted inside the method:
> {code}
> val messageHandler = (mmd: MessageAndMetadata[K, V]) => (mmd.key,
> mmd.message)
> {code}
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