alpinegizmo commented on a change in pull request #31:
URL: https://github.com/apache/flink-training/pull/31#discussion_r698855269



##########
File path: 
rides-and-fares/src/main/scala/org/apache/flink/training/exercises/ridesandfares/scala/RidesAndFaresExercise.scala
##########
@@ -18,55 +18,73 @@
 
 package org.apache.flink.training.exercises.ridesandfares.scala
 
+import org.apache.flink.api.common.JobExecutionResult
+import org.apache.flink.api.common.state.{ValueState, ValueStateDescriptor}
+import org.apache.flink.configuration.Configuration
 import org.apache.flink.streaming.api.functions.co.RichCoFlatMapFunction
+import org.apache.flink.streaming.api.functions.sink.{PrintSinkFunction, 
SinkFunction}
+import org.apache.flink.streaming.api.functions.source.SourceFunction
 import org.apache.flink.streaming.api.scala.{StreamExecutionEnvironment, _}
-import org.apache.flink.training.exercises.common.datatypes.{TaxiFare, 
TaxiRide}
+import org.apache.flink.training.exercises.common.datatypes.{RideAndFare, 
TaxiFare, TaxiRide}
 import org.apache.flink.training.exercises.common.sources.{TaxiFareGenerator, 
TaxiRideGenerator}
-import org.apache.flink.training.exercises.common.utils.ExerciseBase._
-import org.apache.flink.training.exercises.common.utils.{ExerciseBase, 
MissingSolutionException}
+import 
org.apache.flink.training.exercises.common.utils.MissingSolutionException
 import org.apache.flink.util.Collector
 
 /**
-  * The "Stateful Enrichment" exercise of the Flink training in the docs.
+  * The Stateful Enrichment exercise from the Flink training.
   *
   * The goal for this exercise is to enrich TaxiRides with fare information.
-  *
   */
 object RidesAndFaresExercise {
 
-  def main(args: Array[String]) {
+  class RidesAndFaresJob(rideSource: SourceFunction[TaxiRide],
+                         fareSource: SourceFunction[TaxiFare],
+                         sink: SinkFunction[RideAndFare]) {
 
-    // set up streaming execution environment
-    val env = StreamExecutionEnvironment.getExecutionEnvironment
-    env.setParallelism(ExerciseBase.parallelism)
+    def execute(): JobExecutionResult = {
+      val env = StreamExecutionEnvironment.getExecutionEnvironment

Review comment:
       You're right, I don't really want that code in the java exercise. I've 
removed it.




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