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November 27, 2016 11:01
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Spark Streaming Sample program using scala
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mkdir spark-streaming-example | |
cd spark-streaming-example/ | |
mkdir -p src/main/scala | |
cd src/main/scala | |
vim TestStreaming.scala | |
add following line of code to TestStreaming.scala | |
import org.apache.spark.streaming.StreamingContext | |
import org.apache.spark.streaming.StreamingContext._ | |
import org.apache.spark.streaming.dstream.DStream | |
import org.apache.spark.streaming.Duration | |
import org.apache.spark.streaming.Seconds | |
import org.apache.spark.SparkConf | |
object TestStreaming{ | |
def main(args:Array[String]){ | |
val conf = new SparkConf().setAppName("Streaming Test") | |
val ssc = new StreamingContext(conf,Seconds(30)) | |
val lines = ssc.socketTextStream("hostname",6002) | |
val errorLines = lines.filter(_.contains("error")) | |
lines.print | |
errorLines.print() | |
//errorLines.saveAsTextFiles("errorline.txt") | |
println("starting streaming context") | |
ssc.start() | |
println("awaiting termination") | |
ssc.awaitTermination() | |
println("App done") | |
} | |
} | |
cd - | |
vim build.sbt | |
name := "Spark Streaming Example" | |
version := "1.0" | |
scalaVersion := "2.10.4" | |
libraryDependencies ++= Seq("org.apache.spark" %% "spark-core" % "1.4.1","org.apache.spark" %% "spark-streaming" % "1.4.1") | |
*now run sbt package from project home and it will build a jar inside target/scala-2.10/spark-streaming-example_2.10-1.0.jar | |
* run this jar using spark-submit | |
#bin/spark-submit --class TestStreaming target/scala-2.10/spark-streaming-example_2.10-1.0.jar | |
to test this program open a different terminal and run nc -lk `hostname` 6002 hit enter and | |
type anything on console while will display on the spark console. |
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