switch to gradle 8.5 and Java 21

.github/workflows/kotlin.yml

@@ -25,16 +25,17 @@ jobs:
       - name: Checkout Repo
         uses: actions/checkout@v3
 
-      - name: Set up JDK 17 (temurin)
+      - name: Set up Eclipse Temurin JDK
         uses: actions/setup-java@v3
         with:
-          # setup-java v2 supports temurin + zulu distros, see https://github.com/actions/setup-java
+          # setup-java v2 supports temurin + various other distributions
+          # see https://github.com/actions/setup-java?tab=readme-ov-file#supported-version-syntax
           distribution: 'temurin'
-          java-version: 17
+          java-version: 21
 
       - name: Configure AWS Credentials
         # avoid https://github.com/aws-actions/configure-aws-credentials#notice-node12-deprecation-warning
-        uses: aws-actions/configure-aws-credentials@v3.0.1
+        uses: aws-actions/configure-aws-credentials@v3
         if: github.ref == format('refs/heads/{0}', github.event.repository.default_branch) # run only on main
         with:
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
@@ -53,7 +54,7 @@ jobs:
       # https://docs.github.com/en/actions/language-and-framework-guides/building-and-testing-java-with-gradle#caching-dependencies
       # https://docs.github.com/en/actions/configuring-and-managing-workflows/caching-dependencies-to-speed-up-workflows
       - name: Cache Gradle packages
-        uses: actions/cache@v3.3.2
+        uses: actions/cache@v3
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/build.gradle.kts') }}
@@ -62,7 +63,7 @@ jobs:
       # Cache Gradle Wrapper separately
       # Inspired by: https://github.com/JetBrains/intellij-platform-plugin-template/actions/runs/242898088/workflow
       - name: Setup Gradle Wrapper Cache
-        uses: actions/cache@v3.3.2
+        uses: actions/cache@v3
         with:
           path: ~/.gradle/wrapper
           key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}

docs/modules/ROOT/pages/devops/update.adoc

@@ -99,7 +99,8 @@ Generated report file build/dependencyUpdates/report.txt
 
 === Upgrade Gradle
 
-TIP: Use sdkman to manage gradle versions
+TIP: Use sdkman to manage gradle versions, make sure Gradle an JVM Versions match according to the
+https://docs.gradle.org/current/userguide/compatibility.html[Compatibility Matrix]
 
 ----
 sdk list gradle
@@ -114,22 +115,22 @@ lrwxr-xr-x  1 tillkuhn  staff     5 24 Apr 09:25 current@ -> 6.7.1
 .update wrapper props, see also https://docs.gradle.org/current/userguide/gradle_wrapper.html#sec:upgrading_wrapper[Upgrading the Gradle Wrapper]
 ----
 $ grep Url gradle/wrapper/gradle-wrapper.properties
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip
-$ ./gradlew wrapper --gradle-version 7.2
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+$ ./gradlew wrapper --gradle-version 8.5
 ----
 
 And Make sure intellij setup matches
 
-* IntelliJ -> Preferences -> Build Tools -> Gradle -> Specified Location -> use the 7.2 Path
+* IntelliJ -> Preferences -> Build Tools -> Gradle -> Specified Location -> use the 8.5 Path
 * Make sure Gradle JVM is the same as File -> Project Structure -> Project SDK
 
 === API Dockerfile
 
-Check JRE / JDCK version in `api/Dockerfile` and compare with recent versions on https://hub.docker.com/r/adoptopenjdk/openjdk14[dockerhub] (or check for later major versions since it's already 2021)
+Check JRE / JDK version in `api/Dockerfile` and compare with recent versions on https://hub.docker.com/_/eclipse-temurin/tags?page=1&name=21[dockerhub] (or check for later major versions since it's already 2024)
 
 ----
-ARG FROM_TAG=aarch64-ubuntu-jre-16.0.1_9
-FROM adoptopenjdk/openjdk14:$FROM_TAG
+ARG FROM_TAG=21-jre
+FROM eclipse-temurin:$FROM_TAG
 ----
 
 == Upgrade Go Tools

kotlin/build.gradle.kts

@@ -178,7 +178,7 @@ tasks.bootJar {
 }
 
 jacoco {
-    toolVersion = "0.8.7"
+    toolVersion = "0.8.11"
 }
 
 // Configure which reports are generated by Jacococ coverage tool

kotlin/gradle/libs.versions.toml

@@ -19,8 +19,9 @@
 # versions is used to declare the version numbers that will be referenced later by plugins and libraries.
 [versions]
 # Define version we can use as version.ref in [plugins] and [libraries], see flyway-core example below
-# CAUTION: 9.22.3 leads to Caused by: java.lang.IllegalArgumentException: Unsupported class file major v 63 (Java 19)
-flyway = "9.21.1"
+# CAUTION: 9.22.3 causes "Unsupported class file major v 63 (Java 19)" with Java 17
+# 10.4.1 newest causes  java.lang.NoSuchMethodError at FlywayAutoConfiguration.java:254
+flyway = "9.22.3"
 postgresql="42.7.1"
 
 # plugins Were added in Gradle 7.2, are used (obviouly) to define plugins.

kotlin/gradle/wrapper/gradle-wrapper.properties

@@ -3,6 +3,8 @@ distributionPath=wrapper/dists
 # keep the version consistent with you local gradle version managed by sdkman, and the version used by IntelliJ
 # if you don't use the wrapper version for local development
 # check https://services.gradle.org/distributions/ for new versions
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+# check https://docs.gradle.org/current/userguide/compatibility.html for compatibility matrix with JDK versions
+#distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists