Switch to Spark 4 preview 2 (#136)

* Use scala 2.13.13 & Spark 4 snapshot & spark testing base snapshot. Add local maven resolver for snapshots

Add an upsert example

Update sbt version and plugins

Update for Spark 4 / Scala 2.13

* Drop 11 from the build matrix

* We need JDK17

.github/workflows/ci.yml

@@ -9,7 +9,6 @@ jobs:
       matrix:
         include:
           - java: 17
-          - java: 11
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
@@ -179,6 +178,12 @@ jobs:
         path: |
           data/fetched/*
         key: data-fetched
+    - name: Setup JDK
+      uses: actions/setup-java@v3
+      with:
+        distribution: temurin
+        java-version: 17
+        cache: sbt
     - name: Run PySpark examples
       run:
         ./run_pyspark_examples.sh

build.sbt

@@ -1,5 +1,3 @@
-scalaVersion := "2.13.8"
-
 lazy val root = (project in file("."))
   .aggregate(core, native)
 
@@ -16,6 +14,7 @@ organization := "com.highperformancespark"
 
 lazy val V = _root_.scalafix.sbt.BuildInfo
 
+scalaVersion := "2.13.13"
 addCompilerPlugin(scalafixSemanticdb)
 scalacOptions ++= List(
   "-Yrangepos",
@@ -38,7 +37,8 @@ resolvers ++= Seq(
   "Typesafe repository" at "https://repo.typesafe.com/typesafe/releases/",
   "Second Typesafe repo" at "https://repo.typesafe.com/typesafe/maven-releases/",
   "Mesosphere Public Repository" at "https://downloads.mesosphere.io/maven",
-  Resolver.sonatypeRepo("public")
+  Resolver.sonatypeRepo("public"),
+  Resolver.mavenLocal
 )
 
 licenses := Seq("Apache License 2.0" -> url("http://www.apache.org/licenses/LICENSE-2.0.html"))
@@ -67,17 +67,18 @@ val sparkTestingVersion = settingKey[String]("Spark testing base version without
 lazy val core = (project in file("core")) // regular scala code with @native methods
   .dependsOn(native % Runtime)
   .settings(javah / target := (native / nativeCompile / sourceDirectory).value / "include")
+  .settings(scalaVersion := "2.13.13")
   .settings(sbtJniCoreScope := Compile)
   .settings(
     scalaVersion := "2.13.8",
-    javacOptions ++= Seq("-source", "1.8", "-target", "1.8"),
+    javacOptions ++= Seq("-source", "17", "-target", "17"),
     parallelExecution in Test := false,
     fork := true,
     javaOptions ++= Seq("-Xms4048M", "-Xmx4048M", "-Djna.nosys=true"),
     Test / javaOptions ++= specialOptions,
     // 2.4.5 is the highest version we have with the old spark-testing-base deps
-    sparkVersion := System.getProperty("sparkVersion", "3.5.1"),
-    sparkTestingVersion := "1.5.2",
+    sparkVersion := System.getProperty("sparkVersion", "4.0.0-preview2"),
+    sparkTestingVersion := "2.0.1",
     // additional libraries
     libraryDependencies ++= Seq(
       "org.apache.spark" %% "spark-core"                % sparkVersion.value % Provided,
@@ -95,12 +96,13 @@ lazy val core = (project in file("core")) // regular scala code with @native met
       "net.java.dev.jna" % "jna" % "5.12.1"),
     scalacOptions ++= Seq("-deprecation", "-unchecked"),
     pomIncludeRepository := { x => false },
+    resolvers += Resolver.mavenLocal
   )
 
 // JNI Magic!
 lazy val native = (project in file("native")) // native code and build script
   .settings(nativeCompile / sourceDirectory := sourceDirectory.value)
-  .settings(scalaVersion := "2.13.8")
+  .settings(scalaVersion := "2.13.13")
   .enablePlugins(JniNative) // JniNative needs to be explicitly enabled
 
 //tag::xmlVersionConflict[]

core/src/main/scala/com/high-performance-spark-examples/dataframe/LoadSave.scala

@@ -88,6 +88,16 @@ case class LoadSave(sc: SparkContext, session: SparkSession) {
   }
   //end::saveAppend[]
 
+  def upsertPandas(input: DataFrame): Unit = {
+    //tag::upsert[]
+    input.mergeInto("pandaInfo", $"source.id" === $"target.id")
+         .whenMatched() // Note you can override the general match condition above if desired
+         .updateAll()
+         .whenNotMatched()
+         .insertAll()
+    //end::upsert[]
+  }
+
   def createJDBC() = {
     session.read.jdbc("jdbc:dialect:serverName;user=user;password=pass",
       "table", new Properties)

core/src/main/scala/com/high-performance-spark-examples/ml/SimpleNaiveBayes.scala

@@ -38,7 +38,7 @@ class SimpleNaiveBayes(val uid: String)
     // Note this estimator assumes they start at 0 and go to numClasses
     val numClasses = getNumClasses(ds)
     // Get the number of features by peaking at the first row
-    val numFeatures: Integer = ds.select(col($(featuresCol))).head
+    val numFeatures: Integer = ds.select(col($(featuresCol))).head()
       .get(0).asInstanceOf[Vector].size
     // Determine the number of records for each class
     val groupedByLabel = ds.select(col($(labelCol)).as[Double]).groupByKey(x => x)

project/plugins.sbt

@@ -5,16 +5,16 @@ resolvers += "sonatype-releases" at "https://oss.sonatype.org/content/repositori
 resolvers += "sonatype-snapshots" at "https://oss.sonatype.org/content/repositories/snapshots/"
 
 
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.5.1")
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.9.2")
 
 addDependencyTreePlugin
 
 //tag::scalaFix[]
-addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.10.4")
+addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.12.1")
 //end::scalaFix[]
 
 //tag::sbtJNIPlugin[]
-addSbtPlugin("com.github.sbt" %% "sbt-jni" % "1.5.4")
+addSbtPlugin("com.github.sbt" %% "sbt-jni" % "1.7.0")
 //end::sbtJNIPlugin[]
 
 //tag::xmlVersionConflict[]
@@ -24,4 +24,4 @@ ThisBuild / libraryDependencySchemes ++= Seq(
 )
 //end::xmlVersionConflict[]
 
-addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.1.3")
+addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.2.0")