September 2018
Intermediate to advanced
398 pages
9h 43m
English
Content preview from Scala Programming Projects
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Implementing jsonToHttpTransaction
Create the coinyser.BatchProducer class and type the following code:
package coinyserimport java.time.Instantimport java.util.concurrent.TimeUnitimport cats.Monadimport cats.effect.{IO, Timer}import cats.implicits._import org.apache.spark.sql.functions.{explode, from_json, lit}import org.apache.spark.sql.types._import org.apache.spark.sql.{Dataset, SaveMode, SparkSession}import scala.concurrent.duration._object BatchProducer { def jsonToHttpTransactions(json: String)(implicit spark: SparkSession): Dataset[HttpTransaction] = { import spark.implicits._ val ds: Dataset[String] = Seq(json).toDS() val txSchema: StructType = Seq.empty[HttpTransaction].schema val schema = ArrayType(txSchema) val arrayColumn = ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.