java matrix build

Author: niesfisch

.github/workflows/maven-tests.yml

@@ -17,15 +17,24 @@ env:
 permissions:
   contents: read
 
+concurrency:
+  group: maven-tests-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
-  test:
-    name: Test (JDK ${{ matrix.java }})
+  build:
+    name: Build and Test (JDK ${{ matrix.java }})
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
         java:
           - '8'
+          - '17'
+          - '18'
+          - '19'
+          - '20'
+          - '21'
 
     steps:
       - name: Checkout
@@ -38,8 +47,8 @@ jobs:
           java-version: ${{ matrix.java }}
           cache: maven
 
-      - name: Run tests
-        run: mvn -B -ntp test
+      - name: Build and run tests
+        run: mvn -B -ntp verify
 
       - name: Upload surefire reports
         if: always()
@@ -49,27 +58,12 @@ jobs:
           path: target/surefire-reports
           if-no-files-found: warn
 
-  package:
-    name: Package (JDK ${{ matrix.java }})
-    runs-on: ubuntu-latest
-    needs: test
-    strategy:
-      fail-fast: false
-      matrix:
-        java:
-          - '8'
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set up JDK
-        uses: actions/setup-java@v4
+      - name: Upload packaged jars
+        if: success() && (matrix.java == '8' || matrix.java == '21')
+        uses: actions/upload-artifact@v4
         with:
-          distribution: temurin
-          java-version: ${{ matrix.java }}
-          cache: maven
-
-      - name: Build package
-        run: mvn -B -ntp package -DskipTests
+          name: java-code-tracer-jars-jdk-${{ matrix.java }}
+          path: |
+            target/*.jar
+          if-no-files-found: error
 

README.md

@@ -103,6 +103,8 @@ This is a deliberate choice — the primary target is legacy and monolithic syst
 
 It runs fine on newer JVMs (11, 17, 21, …) without any changes.
 
+The GitHub Actions build validates the project on JDK 8 and on JDK 17 through 21.
+
 ## Build
 
 ```bash

pom.xml

@@ -12,8 +12,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>8</java.version>
-        <maven.compiler.source>${java.version}</maven.compiler.source>
-        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <maven.compiler.release>${java.version}</maven.compiler.release>
         <maven.surefire.plugin.version>3.2.5</maven.surefire.plugin.version>
         <maven.compiler.plugin.version>3.13.0</maven.compiler.plugin.version>
         <maven.assembly.plugin.version>3.7.1</maven.assembly.plugin.version>
@@ -32,22 +31,7 @@
         </license>
     </licenses>
 
-    <repositories>
-        <repository>
-            <id>Sonatype-public</id>
-            <name>SnakeYAML repository</name>
-            <url>http://oss.sonatype.org/content/groups/public/</url>
-        </repository>
-    </repositories>
-
     <dependencies>
-        <dependency>
-            <groupId>com.sun</groupId>
-            <artifactId>tools</artifactId>
-            <version>1.6.0</version>
-            <scope>system</scope>
-            <systemPath>${java.home}/../lib/tools.jar</systemPath>
-        </dependency>
         <dependency>
             <groupId>org.yaml</groupId>
             <artifactId>snakeyaml</artifactId>
@@ -97,8 +81,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>${maven.compiler.plugin.version}</version>
                 <configuration>
-                    <source>${maven.compiler.source}</source>
-                    <target>${maven.compiler.target}</target>
+                    <release>${maven.compiler.release}</release>
                 </configuration>
             </plugin>