streaming.scala

import org.apache.kafka.clients.consumer.ConsumerRecord
import org.apache.kafka.common.serialization.StringDeserializer
import org.apache.spark.streaming.kafka010._
import org.apache.spark.streaming.kafka010.LocationStrategies.PreferConsistent
import org.apache.spark.streaming.kafka010.ConsumerStrategies.Subscribe
import org.apache.spark._
import org.apache.spark.streaming._

val kafkaParams = Map[String, Object](
  "bootstrap.servers" -> "10.30.3.41:9092,10.30.3.42:9092,10.30.3.43:9092",
  "key.deserializer" -> classOf[StringDeserializer],
  "value.deserializer" -> classOf[StringDeserializer],
  "group.id" -> "123",
  "auto.offset.reset" -> "latest",
  "enable.auto.commit" -> (false: java.lang.Boolean)
)

val topics = sc.getConf.get("spark.kafka.streaming.topics").split(",")
val ssc = new StreamingContext(sc,Seconds(10))

val stream = KafkaUtils.createDirectStream[String, String](
  ssc,
  PreferConsistent,
  Subscribe[String, String](topics, kafkaParams)
)

val myStream = stream.map(record => (record.key, record.value))