feat: add Java Spring CI workflow and include in PR checks

- Created comprehensive Java Spring CI workflow for standalone testing
- Added Java Spring job to PR checks workflow
- Covers SDK integration tests, REST API validation, and build verification

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Teodor Ciuraru

.github/workflows/java-spring-ci.yml

@@ -0,0 +1,81 @@
+name: Java Spring CI
+
+on:
+  pull_request:
+    branches: [main]
+    paths:
+      - 'java-spring/**'
+      - '.github/workflows/java-spring-ci.yml'
+  push:
+    branches: [main]
+    paths:
+      - 'java-spring/**'
+      - '.github/workflows/java-spring-ci.yml'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build-and-test:
+    name: Build and Test
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        
+      - name: Setup Java 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+          cache: 'gradle'
+          
+      - name: Create .env file
+        run: |
+          echo "DITTO_APP_ID=${{ secrets.DITTO_APP_ID }}" > .env
+          echo "DITTO_PLAYGROUND_TOKEN=${{ secrets.DITTO_PLAYGROUND_TOKEN }}" >> .env
+          echo "DITTO_AUTH_URL=${{ secrets.DITTO_AUTH_URL }}" >> .env
+          echo "DITTO_WEBSOCKET_URL=${{ secrets.DITTO_WEBSOCKET_URL }}" >> .env
+          
+      - name: Make gradlew executable
+        working-directory: java-spring
+        run: chmod +x ./gradlew
+        
+      - name: Run tests
+        working-directory: java-spring
+        run: ./gradlew test --info
+        
+      - name: Build application
+        working-directory: java-spring
+        run: ./gradlew build --info
+        
+      - name: Generate test report
+        if: always()
+        run: |
+          echo "# Java Spring Build Report" > build-report.md
+          echo "" >> build-report.md
+          echo "## Configuration" >> build-report.md
+          echo "- Java Version: 17 (Temurin)" >> build-report.md
+          echo "- Spring Boot: 3.4.3" >> build-report.md
+          echo "- Ditto Java SDK: 5.0.0-preview.1" >> build-report.md
+          echo "- Build Tool: Gradle" >> build-report.md
+          echo "" >> build-report.md
+          echo "## Build Status" >> build-report.md
+          if [ -f java-spring/build/reports/tests/test/index.html ]; then
+            echo "✅ Tests completed - see artifacts for detailed report" >> build-report.md
+          else
+            echo "❌ Tests failed or incomplete" >> build-report.md
+          fi
+          
+      - name: Upload build artifacts
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: java-spring-build-results
+          path: |
+            java-spring/build/reports/
+            java-spring/build/libs/
+            build-report.md

.github/workflows/pr-checks.yml

@@ -176,6 +176,39 @@ jobs:
         working-directory: kotlin-multiplatform
         run: ./gradlew test
 
+  java-spring:
+    name: Java Spring (ubuntu-24.04)
+    runs-on: ubuntu-24.04
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          cache: 'gradle'
+
+      - name: Create .env file
+        run: |
+          echo "DITTO_APP_ID=${{ secrets.DITTO_APP_ID }}" > .env
+          echo "DITTO_PLAYGROUND_TOKEN=${{ secrets.DITTO_PLAYGROUND_TOKEN }}" >> .env
+          echo "DITTO_AUTH_URL=${{ secrets.DITTO_AUTH_URL }}" >> .env
+          echo "DITTO_WEBSOCKET_URL=${{ secrets.DITTO_WEBSOCKET_URL }}" >> .env
+
+      - name: Make gradlew executable
+        working-directory: java-spring
+        run: chmod +x ./gradlew
+
+      - name: Build project
+        working-directory: java-spring
+        run: ./gradlew build
+
+      - name: Run tests including integration tests
+        working-directory: java-spring
+        run: ./gradlew test
+
   flutter:
     name: Flutter (ubuntu-24.04)
     runs-on: ubuntu-24.04