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 {
@@ -22,7 +22,7 @@ pipeline {
 			parallel {
 				stage('Publish JDK 17 + Cassandra 3.11') {
 					when {
-					    anyOf {
+						anyOf {
 							changeset "ci/openjdk17-8-cassandra-3.11/**"
 							changeset "ci/pipeline.properties"
 						}
@@ -39,10 +39,29 @@ pipeline {
 						}
 					}
 				}
+				stage('Publish JDK 20 + Cassandra 3.11') {
+					when {
+						anyOf {
+							changeset "ci/openjdk20-8-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:${p['java.next.tag']}", "--build-arg BASE=${p['docker.java.next.image']} --build-arg CASSANDRA=${p['docker.cassandra.3.version']} ci/openjdk20-8-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 +87,36 @@ 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)

ci/openjdk20-8-cassandra-3.11/Dockerfile

@@ -0,0 +1,27 @@
+ARG BASE
+FROM ${BASE}
+# Any ARG statements before FROM are cleared.
+ARG CASSANDRA
+
+RUN set -eux; \
+	CASSANDRA_URL="https://archive.apache.org/dist/cassandra/${CASSANDRA}/apache-cassandra-${CASSANDRA}-bin.tar.gz"; \
+	sed -i -e 's/http/https/g' /etc/apt/sources.list ; \
+	curl -LfsSo /tmp/cassandra.tar.gz ${CASSANDRA_URL}; \
+		mkdir -p /opt/cassandra /opt/cassandra/data /opt/cassandra/logs; \
+		cd /opt/cassandra; \
+		tar -xf /tmp/cassandra.tar.gz --strip-components=1; \
+		rm -rf /tmp/cassandra.tar.gz; \
+		chmod -R a+rwx /opt/cassandra; \
+		useradd -d /home/jenkins-docker -m -u 1001 -U jenkins-docker;
+
+RUN set -eux; \
+	BINARY_URL='https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u322-b06/OpenJDK8U-jdk_x64_linux_hotspot_8u322b06.tar.gz'; \
+	curl -LfsSo /tmp/openjdk.tar.gz ${BINARY_URL}; \
+		mkdir -p /opt/java/openjdk8; \
+		cd /opt/java/openjdk8; \
+		tar -xf /tmp/openjdk.tar.gz --strip-components=1; \
+		rm -rf /tmp/openjdk.tar.gz;
+
+ENV PATH="/opt/java/openjdk8/bin:$PATH"
+ENV MAX_HEAP_SIZE=1500M
+ENV HEAP_NEWSIZE=300M