[cicd] Migrate to Java21

Author: dizzzz

.github/workflows/ci-container.yml

@@ -11,11 +11,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 1
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
           distribution: liberica
-          java-version: '17'
+          java-version: '21'
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
         with:
@@ -36,7 +36,7 @@ jobs:
         # Hack around #5450
       - name: pull base image
         run: |
-          docker pull --platform linux/amd64 --platform linux/arm64 gcr.io/distroless/java17-debian12:latest      
+          docker pull --platform linux/amd64 --platform linux/arm64 gcr.io/distroless/java21-debian12:latest      
       - name: Build images
         run: mvn -V -B -q -Pdocker -DskipTests -Ddependency-check.skip=true -P !mac-dmg-on-unix,!installer,!concurrency-stress-tests,!micro-benchmarks,skip-build-dist-archives clean package
       - name: Check local images

.github/workflows/ci-snapshots.yml

@@ -15,11 +15,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 1
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
           distribution: liberica
-          java-version: '17'
+          java-version: '21'
           server-id: github
           settings-path: ${{ github.workspace }}
       - name: Cache Maven packages

.github/workflows/ci-test.yml

@@ -4,7 +4,7 @@ permissions:
   contents: read
 env:
   MAVEN_OPTS: -DtrimStackTrace=false -D'maven.resolver.transport=wagon'
-  DEV_JDK: '17'
+  DEV_JDK: '21'
 jobs:
   license:
     name: License check
@@ -40,7 +40,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
-        jvm: ['17', '21']
+        jvm: ['21']
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4

.github/workflows/ci-xqts.yml

@@ -9,11 +9,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
           distribution: liberica
-          java-version: '17'
+          java-version: '21'
       - name: Cache Maven packages
         uses: actions/cache@v4
         with:

.github/workflows/sonarcloud.yml

@@ -14,11 +14,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
           distribution: liberica
-          java-version: 17
+          java-version: 21
       - name: Cache SonarCloud packages
         uses: actions/cache@v4
         with:

exist-core-jmh/pom.xml

@@ -121,11 +121,6 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <compilerVersion>${project.build.target}</compilerVersion>
-                    <source>${project.build.source}</source>
-                    <target>${project.build.target}</target>
-                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>

exist-core/pom.xml

@@ -1094,6 +1094,7 @@ The BaseX Team. The original license statement is also included below.]]></pream
             </plugin>
 
             <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <executions>
                     <execution>
@@ -1135,9 +1136,9 @@ The BaseX Team. The original license statement is also included below.]]></pream
                         <configuration>
                             <forceAjcCompile>true</forceAjcCompile>  <!-- Required, otherwise the Aspects are not re-compiled when the src/main/java is recompiled for the test phase -->
                             <showWeaveInfo>true</showWeaveInfo>
-                            <complianceLevel>${project.build.source}</complianceLevel>
-                            <source>${project.build.source}</source>
-                            <target>${project.build.target}</target>
+                            <complianceLevel>${maven.compiler.release}</complianceLevel>
+                            <source>${maven.compiler.source}</source>
+                            <target>${maven.compiler.target}</target>
                             <!-- sources>
                                 <source>
                                     <basedir>${project.build.sourceDirectory}</basedir>

exist-parent/pom.xml

@@ -92,8 +92,9 @@
     </mailingLists>
 
     <properties>
-        <project.build.source>17</project.build.source>
-        <project.build.target>17</project.build.target>
+        <maven.compiler.release>21</maven.compiler.release>
+        <maven.compiler.source>${maven.compiler.release}</maven.compiler.source>
+        <maven.compiler.target>${maven.compiler.release}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <project.copyright.name>The eXist-db Authors</project.copyright.name>
@@ -693,10 +694,8 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.13.0</version>
+                    <version>3.14.0</version>
                     <configuration>
-                        <source>${project.build.source}</source>
-                        <target>${project.build.target}</target>
                         <encoding>${project.build.sourceEncoding}</encoding>
                     </configuration>
                 </plugin>
@@ -753,7 +752,7 @@
                     <artifactId>maven-javadoc-plugin</artifactId>
                     <version>3.11.2</version>
                     <configuration>
-                        <source>${project.build.source}</source>
+                        <source>${maven.compiler.release}</source>
                         <archive>
                             <manifest>
                                 <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
@@ -977,6 +976,31 @@
         </pluginManagement>
 
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-enforcer-plugin</artifactId>
+                <version>3.5.0</version>
+                <executions>
+                    <execution>
+                        <id>enforce-java</id>
+                        <goals>
+                            <goal>enforce</goal>
+                        </goals>
+                        <configuration>
+                            <rules>
+                                <requireJavaVersion>
+                                    <version>${maven.compiler.target}</version>
+                                    <message>eXist-db requires (at least) OpenJDK ${maven.compiler.target} to build and run.</message>
+                                </requireJavaVersion>
+                                <requireMavenVersion>
+                                    <message>Modern plugins require atleast maven 3.6.3.</message>
+                                    <version>3.6.3</version>
+                                </requireMavenVersion>
+                            </rules>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>com.mycila</groupId>
                 <artifactId>license-maven-plugin</artifactId>