Modern Scala Projects

Step 3 – creating a trait called SpamWrapper

In IntelliJ, using File | New | Scala class, create an empty Scala trait called SpamWrapper in a file called SpamWrapper.scala.

First things first. At the top of the file, we will set up the following imports for implementing classes to take advantage of this trait:

• SparkSession—the entry point to programming with Spark
• The appropriate Log4J library imports, so that we can dial down logging messages from Spark:

These are the minimum imports. Next, create an empty trait. The following is an updated trait:

trait SpamWrapper {  }

Inside the SpamWrapper trait, create a SparkSession instance called session. At this point, here is a refresher on Spark:

• We need a SparkSession object instance to be ...