Hi Experts!
I want to save DStream to HDFS only if it is not empty such that it contains
some kafka messages to be stored. What is an efficient way to do this.
var data = KafkaUtils.createStream[Array[Byte], Array[Byte],
DefaultDecoder, DefaultDecoder] (ssc, params, topicMap,
StorageLevel.MEMORY_ONLY).map(_._2)
val streams = data.window(Seconds(interval*4),
Seconds(interval*2)).map(x => new String(x))
//streams.foreachRDD(rdd=>rdd.foreach(println))
//what condition can be applied here to store only non empty DStream
streams.saveAsTextFiles(sink, "msg")
Thanks
--
View this message in context:
http://apache-spark-user-list.1001560.n3.nabble.com/Saving-Data-only-if-Dstream-is-not-empty-tp20587.html
Sent from the Apache Spark User List mailing list archive at Nabble.com.
---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscr...@spark.apache.org
For additional commands, e-mail: user-h...@spark.apache.org
