Test with Java 20 in CI.

See #1367.

Author: gregturn

Jenkinsfile

@@ -1,7 +1,7 @@
 def p = [:]
 node {
-    checkout scm
-    p = readProperties interpolate: true, file: 'ci/pipeline.properties'
+	checkout scm
+	p = readProperties interpolate: true, file: 'ci/pipeline.properties'
 }
 
 pipeline {
@@ -18,31 +18,7 @@ pipeline {
 	}
 
 	stages {
-		stage("Docker images") {
-			parallel {
-				stage('Publish JDK 17 + Cassandra 3.11') {
-					when {
-					    anyOf {
-							changeset "ci/openjdk17-8-cassandra-3.11/**"
-							changeset "ci/pipeline.properties"
-						}
-					}
-					agent { label 'data' }
-					options { timeout(time: 30, unit: 'MINUTES') }
-
-					steps {
-						script {
-							def image = docker.build("springci/spring-data-with-cassandra-3.11:${p['java.main.tag']}", "--build-arg BASE=${p['docker.java.main.image']} --build-arg CASSANDRA=${p['docker.cassandra.3.version']} ci/openjdk17-8-cassandra-3.11/")
-							docker.withRegistry(p['docker.registry'], p['docker.credentials']) {
-								image.push()
-							}
-						}
-					}
-				}
-			}
-		}
-
-		stage("test: baseline (Java 17)") {
+		stage("test: baseline (main)") {
 			when {
 				beforeAgent(true)
 				anyOf {
@@ -68,6 +44,36 @@ pipeline {
 			}
 		}
 
+		stage("Test other configurations") {
+			when {
+				beforeAgent(true)
+				allOf {
+					branch(pattern: "main|(\\d\\.\\d\\.x)", comparator: "REGEXP")
+					not { triggeredBy 'UpstreamCause' }
+				}
+			}
+			parallel {
+				stage("test: baseline (next)") {
+					agent {
+						label 'data'
+					}
+					options { timeout(time: 30, unit: 'MINUTES') }
+					environment {
+						ARTIFACTORY = credentials("${p['artifactory.credentials']}")
+					}
+					steps {
+						script {
+							docker.image("harbor-repo.vmware.com/dockerhub-proxy-cache/springci/spring-data-with-cassandra-3.11:${p['java.next.tag']}").inside('-v $HOME:/tmp/jenkins-home') {
+								sh 'mkdir -p /tmp/jenkins-home'
+								sh 'JAVA_HOME=/opt/java/openjdk8 /opt/cassandra/bin/cassandra -R &'
+								sh 'MAVEN_OPTS="-Duser.name=jenkins -Duser.home=/tmp/jenkins-home" ./mvnw -s settings.xml -Pci,external-cassandra clean dependency:list verify -Dsort -U -B'
+							}
+						}
+					}
+				}
+			}
+		}
+
 		stage('Release to artifactory') {
 			when {
 				beforeAgent(true)