Switch to jdk 21 and use toolchains to test on older JDK

Author: gnodet

.github/workflows/build.yml

@@ -29,7 +29,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        java: [ '11' ]
+        java: [ '21' ]
     steps:
       - uses: actions/checkout@v4
 
@@ -60,15 +60,15 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest ]
-        java: [ '8', '11', '17' ]
+        java: [ '8', '11', '17', '21' ]
     steps:
       - uses: actions/checkout@v4
 
       - name: Set up JDK ${{ matrix.java }}
         uses: actions/setup-java@v4
         with:
           distribution: temurin
-          java-version: ${{ matrix.java }}
+          java-version: ${{ matrix.java }}, 21
 
       - uses: actions/cache@v4
         with:
@@ -78,21 +78,33 @@ jobs:
             ${{ matrix.os }}-maven-
 
       - name: Set up Maven
+        uses: stCarolas/setup-maven@v5
+        with:
+          maven-version: '3.9.8'
+
+      - name: Build and test with maven
+        # Skip all static checks, they were already done in the compile jobs
         run:
-          mvn --errors --batch-mode --show-version org.apache.maven.plugins:maven-wrapper-plugin:3.3.2:wrapper "-Dmaven=3.9.8"
+          mvn -B --errors --activate-profiles ci,jdk8 "-DjdkToolchainVersion=[,9)" --no-transfer-progress package
+        if: matrix.java == '8'
+
+      - name: Build and test with maven
+        # Skip all static checks, they were already done in the compile jobs
+        run:
+          mvn -B --errors --activate-profiles ci "-DjdkToolchainVersion=[11,12)" --no-transfer-progress package
+        if: matrix.java == '11'
 
       - name: Build and test with maven
         # Skip all static checks, they were already done in the compile jobs
         run:
-          mvnw.cmd -B --errors --activate-profiles ci,jdk${{ matrix.java }} --no-transfer-progress package
-        shell: cmd
-        if: matrix.os == 'windows-latest'
+          mvn -B --errors --activate-profiles ci "-DjdkToolchainVersion=[17,18)" --no-transfer-progress package
+        if: matrix.java == '17'
 
       - name: Build and test with maven
         # Skip all static checks, they were already done in the compile jobs
         run:
-          ./mvnw -B --errors --activate-profiles ci,jdk${{ matrix.java }} --no-transfer-progress package
-        if: matrix.os != 'windows-latest'
+          mvn -B --errors --activate-profiles ci "-DjdkToolchainVersion=[21,22)" --no-transfer-progress package
+        if: matrix.java == '21'
 
       - name: Archive test results and logs
         # if: success() || failure() to also get the test results on successful runs.

pom.xml

@@ -79,7 +79,8 @@
     </scm>
 
     <properties>
-        <minimalJavaBuildVersion>11</minimalJavaBuildVersion>
+        <minimalJavaBuildVersion>21</minimalJavaBuildVersion>
+        <jdkToolchainVersion>[${minimalJavaBuildVersion},)</jdkToolchainVersion>
         <minimalMavenBuildVersion>3.9.8</minimalMavenBuildVersion>
 
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -132,6 +133,47 @@
     </properties>
 
     <profiles>
+        <profile>
+            <id>toolchains</id>
+            <activation>
+                <property>
+                    <name>jdkToolchainVersion</name>
+                </property>
+            </activation>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-toolchains-plugin</artifactId>
+                        <version>3.2.0</version>
+                        <executions>
+                            <execution>
+                                <id>load</id>
+                                <phase>validate</phase>
+                                <goals>
+                                    <goal>select-jdk-toolchain</goal>
+                                </goals>
+                                <configuration>
+                                    <version>[${minimalJavaBuildVersion},)</version>
+                                    <useJdk>Never</useJdk>
+                                </configuration>
+                            </execution>
+                            <execution>
+                                <id>pre-test</id>
+                                <phase>process-test-classes</phase>
+                                <goals>
+                                    <goal>select-jdk-toolchain</goal>
+                                </goals>
+                                <configuration>
+                                    <version>${jdkToolchainVersion}</version>
+                                    <useJdk>Never</useJdk>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
         <profile>
             <id>jdk8</id>
             <properties>
@@ -162,15 +204,6 @@
             </plugins>
             </build>
         </profile>
-        <profile>
-            <id>jdk11</id>
-        </profile>
-        <profile>
-            <id>jdk17</id>
-        </profile>
-        <profile>
-            <id>jdk21</id>
-        </profile>
 
         <profile>
             <id>ci</id>