使用Datastax Spark Cassandra Connector将PairDStram写入cassandra

Question

I need to write data of my filtered stream to cassandra using Java and Datastax Spark Cassandra Connector.

I followed the datastax java documentation .

The documentation explains how to write a RDD to cassandra, but not how to write a Dstream.

I need to be able to save a PairDStream and I don't know how to do it, because all examples are written in scala.

I need to turn the following code written in scala in the java's code:

val wc = stream.flatMap(_.split("\\s+"))
    .map(x => (x, 1))
    .reduceByKey(_ + _)
    .saveToCassandra("streaming_test", "words", SomeColumns("word", "count")) 

Basically I have to save a JavaPairDStream<String, Integer>

Answer 1

Solution, in case anyone looking for the answer

To write a DStream or JavaDStream to Cassandra, need to import:

import static com.datastax.spark.connector.japi.CassandraStreamingJavaUtil.*;

and use javaFunctions(DStream<T> arg0) or javaFunctions(JavaDStream<T> arg0)