Java Maven CI

Complete continuous integration workflow for a Java Maven project, including multi-JDK version matrix, build, test, and package.

name: Java Maven CI

on:
  push:
    branches:
      - main
      - 'release/**'
    paths:
      - 'src/**'
      - 'pom.xml'
  pull_request:
    branches:
      - main

concurrency:
  max: 1
  exceed-action: QUEUE

permissions:
  repository: read

jobs:
  build:
    name: JDK ${{ matrix.java-version }} Build
    runs-on: {ubuntu-24,x64,small}
    strategy:
      matrix:
        java-version: [8, 11, 17, 21]
      fail-fast: false
      max-parallel: 4

    steps:
      - name: Checkout code
        uses: checkout

      - name: Setup JDK ${{ matrix.java-version }}
        uses: setup-java
        with:
          java-version: ${{ matrix.java-version }}
          distribution: 'temurin'
          cache: 'maven'

      - name: Maven Compile
        run: mvn compile -B --no-transfer-progress

      - name: Maven Unit Test
        run: mvn test -B --no-transfer-progress

      - name: Maven Integration Test
        run: mvn verify -B --no-transfer-progress -DskipUnitTests

      - name: Test Results Summary
        if: ${{ always }}
        run: |
          echo "## Maven Test Results - JDK ${{ matrix.java-version }}" >> $ATOMGIT_STEP_SUMMARY
          echo "Build Status: ${{ job.status }}" >> $ATOMGIT_STEP_SUMMARY

  package:
    name: Package and Release
    needs: build
    runs-on: {ubuntu-24,x64,small}
    if: ${{ startsWith(atomgit.ref, 'refs/tags/') }}

    steps:
      - name: Checkout code
        uses: checkout

      - name: Setup JDK 17
        uses: setup-java
        with:
          java-version: '17'
          distribution: 'temurin'
          cache: 'maven'

      - name: Maven Package (Skip Tests)
        run: mvn package -B -DskipTests --no-transfer-progress

      - name: Upload JAR Artifact
        uses: upload-artifact
        with:
          name: maven-artifacts
          path: target/*.jar
          retention-days: 30