feat: upgrade to Java 21 LTS and Hibernate 6.6.18

- Compiler source/target 17 -> 21 (current LTS)
- Hibernate ORM 6.3.1.Final -> 6.6.18.Final
- Remove --add-opens JVM flags (no longer needed with Hibernate 6.6)
- Update Dockerfile and CI to use JDK 21

Author: fmaass

.github/workflows/build-deploy.yml

@@ -17,10 +17,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: "17"
+          java-version: "21"
           distribution: "temurin"
           cache: maven
 
@@ -37,10 +37,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: "17"
+          java-version: "21"
           distribution: "temurin"
           cache: maven
 

Dockerfile

@@ -4,20 +4,16 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 ENV LANG=C.UTF-8
 ENV LC_ALL=C.UTF-8
-ENV JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64/
-ENV JAVA_OPTIONS="-Dfile.encoding=UTF-8 -Xms512m -Xmx2g -XX:+UseG1GC -XX:MaxGCPauseMillis=200 \
-    --add-opens java.base/java.lang=ALL-UNNAMED \
-    --add-opens java.base/java.util=ALL-UNNAMED \
-    --add-opens java.base/java.io=ALL-UNNAMED \
-    --add-opens java.base/java.nio=ALL-UNNAMED"
+ENV JAVA_HOME=/usr/lib/jvm/java-21-openjdk-amd64/
+ENV JAVA_OPTIONS="-Dfile.encoding=UTF-8 -Xms512m -Xmx2g -XX:+UseG1GC -XX:MaxGCPauseMillis=200"
 ENV JETTY_VERSION=12.0.21
 ENV JETTY_HOME=/opt/jetty
 
 # Install packages
 RUN apt-get update && \
     apt-get upgrade -y -q libgnutls30 && \
     apt-get -y -q --no-install-recommends install \
-    vim less procps curl unzip wget tzdata openjdk-17-jdk \
+    vim less procps curl unzip wget tzdata openjdk-21-jdk \
     ffmpeg \
     mediainfo \
     tesseract-ocr \

pom.xml

@@ -11,8 +11,8 @@
   <name>Docs Parent</name>
 
   <properties>
-    <maven.compiler.source>17</maven.compiler.source>
-    <maven.compiler.target>17</maven.compiler.target>
+    <maven.compiler.source>21</maven.compiler.source>
+    <maven.compiler.target>21</maven.compiler.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
     <!-- Dependencies version (external) -->
@@ -36,7 +36,7 @@
     <org.apache.pdfbox.pdfbox.version>2.0.29</org.apache.pdfbox.pdfbox.version>
     <org.bouncycastle.bcprov-jdk18on.version>1.83</org.bouncycastle.bcprov-jdk18on.version>
     <joda-time.joda-time.version>2.12.2</joda-time.joda-time.version>
-    <org.hibernate.hibernate.version>6.3.1.Final</org.hibernate.hibernate.version>
+    <org.hibernate.hibernate.version>6.6.18.Final</org.hibernate.hibernate.version>
     <fr.opensagres.xdocreport.version>2.0.4</fr.opensagres.xdocreport.version>
     <xerces.xercesImpl.version>2.12.2</xerces.xercesImpl.version>
     <net.java.dev.jna.jna.version>5.13.0</net.java.dev.jna.jna.version>
@@ -97,12 +97,6 @@
         <configuration>
           <forkCount>1</forkCount>
           <reuseForks>false</reuseForks>
-          <argLine>
-            --add-opens java.base/java.lang=ALL-UNNAMED
-            --add-opens java.base/java.util=ALL-UNNAMED
-            --add-opens java.base/java.io=ALL-UNNAMED
-            --add-opens java.base/java.nio=ALL-UNNAMED
-          </argLine>
         </configuration>
       </plugin>