Remove Java 17 build, switch to 21 (#4483)

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

.github/workflows/ci-build.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [ '17', '21', 'profile-j21' ]
+        java: [ '21' ]
         maven: [ '3.9.9' ]
         os: [ 'ubuntu-24.04' ]
     name: Build (Java ${{ matrix.java }}, ${{ matrix.os }})
@@ -46,18 +46,10 @@ jobs:
 
       - name: Set up Java ${{ matrix.java }}
         uses: actions/setup-java@v4
-        if: ${{ matrix.java != 'profile-j21' }}
         with:
           distribution: 'temurin'
           java-version: ${{ matrix.java }}
 
-      - name: Set up Java ${{ matrix.java }}
-        uses: actions/setup-java@v4
-        if: ${{ matrix.java == 'profile-j21' }}
-        with:
-          distribution: 'temurin'
-          java-version: ${{ 21 }}
-
       - name: Set up Maven ${{ matrix.maven }}
         uses: stCarolas/setup-maven@v5
         with:
@@ -70,7 +62,6 @@ jobs:
           echo "::add-matcher::.github/openhab-compile-problems.json"
 
       - name: Build
-        if: ${{ matrix.java != 'profile-j21' }}
         id: build
         run: './.github/scripts/maven-build'
         env:
@@ -80,33 +71,22 @@ jobs:
             -Dmaven.wagon.httpconnectionManager.ttlSeconds=25
             -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn
 
-      - name: Build
-        if: ${{ matrix.java == 'profile-j21' }}
-        id: build-j21
-        run: './.github/scripts/maven-build clean verify -B -T 1.5C -U -Pj21'
-        env:
-          MAVEN_OPTS: >-
-            -Xmx2g
-            -Dmaven.wagon.http.retryHandler.count=5
-            -Dmaven.wagon.httpconnectionManager.ttlSeconds=25
-            -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn
-
       - name: Upload Build Log
-        if: ${{ always() && ((steps.build.outcome == 'success') || (steps.build.outcome == 'failure') || (steps.build-j21.outcome == 'success') || (steps.build-j21.outcome == 'failure')) }}
+        if: ${{ always() && ((steps.build.outcome == 'success') || (steps.build.outcome == 'failure')) }}
         uses: actions/upload-artifact@v4
         with:
           name: build-log-java-${{ matrix.java }}-${{ matrix.os }}
           path: build.log
 
       - name: Upload SAT Summary Report
-        if: ${{ matrix.java == '17' && always() && ((steps.build.outcome == 'success') || (steps.build.outcome == 'failure')) }}
+        if: ${{ always() && ((steps.build.outcome == 'success') || (steps.build.outcome == 'failure')) }}
         uses: actions/upload-artifact@v4
         with:
           name: sat-summary-report
           path: target/summary_report.html
 
       - name: Report SAT Errors as Annotations
-        if: ${{ matrix.java == '17' && always() && ((steps.build.outcome == 'success') || (steps.build.outcome == 'failure')) }}
+        if: ${{ matrix.java == '21' && always() && ((steps.build.outcome == 'success') || (steps.build.outcome == 'failure')) }}
         uses: ghys/checkstyle-github-action@main
         with:
           title: CheckStyle Violations

README.md

@@ -23,7 +23,7 @@ If you have not worked with Maven yet, just follow the instructions and everythi
 
 What you need before you start:
 
-- Java SE Development Kit 17
+- Java SE Development Kit 21
 - Maven 3 from https://maven.apache.org/download.html
 
 Make sure that the `mvn` command is available on your path

pom.xml

@@ -64,7 +64,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <maven.compiler.release>17</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
 
     <bnd.version>7.1.0</bnd.version>
     <commons.net.version>3.7.2</commons.net.version>
@@ -669,7 +669,7 @@ Import-Package: \\
                   <version>3.6.3</version>
                 </requireMavenVersion>
                 <requireJavaVersion>
-                  <version>[17.0,18.0),[21.0,22.0)</version>
+                  <version>[21.0,22.0)</version>
                 </requireJavaVersion>
               </rules>
             </configuration>
@@ -844,11 +844,5 @@ Import-Package: \\
         </pluginManagement>
       </build>
     </profile>
-    <profile>
-      <id>j21</id>
-      <properties>
-        <maven.compiler.release>21</maven.compiler.release>
-      </properties>
-    </profile>
   </profiles>
 </project>