java.yml

name: Java CI

on:
  push:
    branches: [ master ]

  pull_request:
    branches: [ master ]
    paths:
      - '.github/workflows/java.yml'
      - 'java-example/**'
      - 'java-metric-example/**'

jobs:
  build_and_run_java_app:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        distribution: [ 'temurin' ]
        java-version: [ '8', '11', '17' ]

    name: Java ${{ matrix.java-version }}
    steps:
      - uses: actions/checkout@v2
      - name: Set up JAVA
        uses: actions/setup-java@v2
        with:
          java-version: ${{ matrix.java-version }}
          distribution: ${{ matrix.distribution }}
          cache: maven

      - name: Build java-metric-example with Maven
        run: mvn --batch-mode --update-snapshots verify --file java-example/otel-collector/pom.xml
      - name: Build java-example with Maven
        run: mvn --batch-mode --update-snapshots verify --file java-example/otel-collector/pom.xml
      - name: Compile and Run java-example
        run: |
          mvn clean compile exec:java -Dexec.mainClass="com.vmware.App" -Dexec.cleanupDaemonThreads=false --file java-example/otel-collector/pom.xml | tee mvn.log
      - name: Check java-example Output
        run: |
          # Get count of unique Trace IDs from output; 'xargs' trims whitespace
          count=$(grep 'TraceID : ' mvn.log | rev | cut -f1 -d' ' | uniq | wc -l | xargs)
          if [[ $count -ne 3 ]]; then
            echo "[ERROR] Wrong TraceID count. Expected: 3. Actual: ${count}."
            exit 1
          fi