Hi,
I have a streaming topic called "md" that displays test market data.
I have written a simple program to stream data in via kafka into flinl.
Flink version 1.5
Kafka version 2.12
This is the sample program in scala that compiles ok in start-scala-shell.sh
import java.util.Properties
import java.util.Arrays
import org.apache.flink.api.common.functions.MapFunction
import org.apache.flink.api.java.utils.ParameterTool
import org.apache.flink.streaming.api.datastream.DataStream
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer09
import org.apache.flink.streaming.util.serialization.SimpleStringSchema
import org.apache.flink.streaming.util.serialization.DeserializationSchema
//import org.apache.flink.streaming.api.scala._
import org.apache.flink.streaming.util.serialization.SimpleStringSchema
object Main {
def main(args: Array[String]) {
val env = StreamExecutionEnvironment.getExecutionEnvironment
val properties = new Properties()
properties.setProperty("bootstrap.servers", "localhost:9092")
properties.setProperty("zookeeper.connect", "localhost:2181")
properties.setProperty("group.id", "sampleScala")
val stream = env
.addSource(new FlinkKafkaConsumer09[String]("md", new
SimpleStringSchema(), properties))
.print()
env.execute("Flink Kafka Example")
}
}
warning: there was one deprecation warning; re-run with -deprecation for
details
defined object Main
But I do not see any streaming output.
A naïve question. How do I execute the above compiled object in this shell?
Thanks
Dr Mich Talebzadeh
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