ci: share onnx model between jobs

python and java application merged into same workflow
model converted to onnx is also shared between those jobs

Author: Ahwar

.github/workflows/java-app.yml

@@ -1,34 +1,83 @@
-# This workflow will build a Java project with Gradle and cache/restore any dependencies to improve the workflow execution time
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-gradle
-
-name: Java CI with Gradle
+# This workflow converts a Hugging Face model to ONNX format, builds a Java application with Gradle,
+# and generates and submits a dependency graph for the project.
+name: Java application
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ["main"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
+
+permissions:
+  contents: read
 
 jobs:
-  build:
+  convert-model-to-onnx:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -q transformers[onnx] transformers[sentencepiece] torch
+      - name: Hugging Face Model to ONNX
+        run: |
+          # Convert Hugging Face Model to ONNX
+          python -m transformers.onnx --opset 16 --atol 0.005 --feature=token-classification --model=xlm-roberta-large-finetuned-conll03-english onnx_model/
+
+      # Upload the ONNX model as an artifact
+      - name: Upload ONNX model
+        uses: actions/upload-artifact@v4.3.6
+        with:
+          # Artifact name
+          name: onnx_model # default: artifact
+          # Files to upload
+          path: onnx_model/
+          # Behavior if no files found: warn, error, ignore
+          if-no-files-found: error
+          # Expiration in days (1-90, 0 for default)
+          retention-days: 0
+          # Compression level (0-9, default: 6)
+          compression-level: 7
+          # Overwrite existing artifact (default: false)
+          overwrite: true
+
+  # Build Java application with Gradle
+  build-java:
     runs-on: ubuntu-latest
     permissions:
       contents: read
+    needs: convert-model-to-onnx
 
     steps:
       - uses: actions/checkout@v4
-
+      # Set up JDK 17
       - name: Set up JDK 17
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
-          distribution: 'temurin'
+          java-version: "17"
+          distribution: "temurin"
 
       # Configure Gradle for optimal use in GitHub Actions, including caching of downloaded dependencies.
       # See: https://github.com/gradle/actions/blob/main/setup-gradle/README.md
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@af1da67850ed9a4cedd57bfd976089dd991e2582 # v4.0.0
 
+      - name: Download ONNX model from Artifact
+        uses: actions/download-artifact@v4.1.8
+        with:
+          name: onnx_model
+          path: raw-files # path to download the artifact to
+          run-id: ${{ github.run_id }}
+
+      - name: See artifact contents
+        run: tree raw-files
+
   # This job is responsible for generating and submitting a dependency graph for the project.
   # Generates and submits a dependency graph, enabling Dependabot Alerts for all project dependencies.
   # See: https://github.com/gradle/actions/blob/main/dependency-submission/README.md
@@ -43,8 +92,8 @@ jobs:
       - name: Set up JDK 17
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
-          distribution: 'temurin'
+          java-version: "17"
+          distribution: "temurin"
 
       - name: Generate and submit dependency graph
         uses: gradle/actions/dependency-submission@af1da67850ed9a4cedd57bfd976089dd991e2582 # v4.0.0