Add CI pipeline workflow for testing and coverage

.github/workflows/main.yml

@@ -0,0 +1,168 @@
+name: CI Pipeline
+
+on:
+  push:
+    branches: ["main", "develop", "feature/**"]
+  pull_request:
+    branches: ["main"]
+
+permissions:
+  contents: read
+  actions: read
+  checks: write
+
+env:
+  JAVA_VERSION: "17"
+  MIN_COVERAGE: "70"
+
+jobs:
+  detect-changes:
+    name: Detect changed services
+    runs-on: ubuntu-latest
+    outputs:
+      changed: ${{ steps.detect.outputs.changed }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Detect changed microservices
+        id: detect
+        run: |
+          git fetch origin main || true
+          CHANGED=$(git diff --name-only origin/main...HEAD | grep -E '^(customers-service|vets-service|visit-service|api-gateway|admin-server|discovery-server|config-server)/' | cut -d'/' -f1 | sort -u | xargs)
+          echo "Changed services: $CHANGED"
+          echo "changed=$CHANGED" >> $GITHUB_OUTPUT
+
+  test:
+    name: Unit Test & Coverage
+    needs: detect-changes
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ env.JAVA_VERSION }}
+
+      - uses: actions/cache@v4
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+
+      - name: Run tests
+        run: |
+          if [ -z "${{ needs.detect-changes.outputs.changed }}" ]; then
+            echo "No changed services — running all tests."
+            mvn -B clean test
+          else
+            for s in ${{ needs.detect-changes.outputs.changed }}; do
+              echo "Testing $s ..."
+              cd $s
+              mvn -B clean test
+              cd ..
+            done
+          fi
+
+      - name: Debug list files in workspace
+        if: always()
+        run: |
+          echo "Listing coverage files..."
+          find . -type f -name "jacoco*.xml" | sort || true
+          echo "Listing target directories..."
+          find . -type d -name "jacoco" | sort || true
+
+      - name: Upload test reports
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: junit-reports
+          path: '**/target/surefire-reports/*.xml'
+
+      - name: Upload JaCoCo reports
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: jacoco-reports
+          path: '**/target/site/jacoco/jacoco.xml'
+
+  coverage-check:
+    name: Verify coverage threshold
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/download-artifact@v4
+        with:
+          name: jacoco-reports
+          path: ./reports
+
+      - name: Calculate coverage and validate
+        env:
+          MIN_COVERAGE: ${{ env.MIN_COVERAGE }}
+        run: |
+          total_missed=0
+          total_covered=0
+          for file in $(find ./reports -name "jacoco.xml" || true); do
+            while read -r line; do
+              missed=$(echo "$line" | grep -oP 'missed="\K[0-9]+' || echo 0)
+              covered=$(echo "$line" | grep -oP 'covered="\K[0-9]+' || echo 0)
+              total_missed=$((total_missed + missed))
+              total_covered=$((total_covered + covered))
+            done < <(grep '<counter type="INSTRUCTION"' "$file" || true)
+          done
+          if [ "$total_covered" -eq 0 ] && [ "$total_missed" -eq 0 ]; then
+            echo "No coverage data found."
+            exit 1
+          fi
+          coverage=$(awk -v c=$total_covered -v m=$total_missed 'BEGIN {printf "%.2f", c*100/(c+m)}')
+          echo "Coverage: $coverage%"
+          if (( $(echo "$coverage < $MIN_COVERAGE" | bc -l) )); then
+            echo "Coverage below $MIN_COVERAGE%"
+            exit 1
+          else
+            echo "Coverage OK ($coverage%)"
+          fi
+
+  build:
+    name: Build Changed Services
+    needs: [test, coverage-check]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ env.JAVA_VERSION }}
+
+      - uses: actions/cache@v4
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+
+      - name: Build services
+        run: |
+          if [ -z "${{ needs.detect-changes.outputs.changed }}" ]; then
+            echo "No changed services — building all modules."
+            mvn -B clean package -DskipTests
+          else
+            for s in ${{ needs.detect-changes.outputs.changed }}; do
+              echo "Building $s ..."
+              cd $s
+              mvn -B clean package -DskipTests
+              cd ..
+            done
+          fi
+
+      - name: Upload build artifacts
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: built-jars
+          path: '**/target/*.jar'

.github/workflows/maven-build.yml

@@ -1,6 +1,3 @@
-# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
-# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
-
 name: Java CI with Maven
 
 on:
@@ -11,19 +8,24 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
     strategy:
       matrix:
         java: [ '17' ]
 
     steps:
-    - uses: actions/checkout@v4
-    - name: Set up JDK ${{matrix.java}}
-      uses: actions/setup-java@v4
-      with:
-        java-version: ${{matrix.java}}
-        distribution: 'adopt'
-        cache: maven
-    - name: Build with Maven
-      run: mvn -B package --file pom.xml
+      - uses: actions/checkout@v4
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v4
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: 'temurin'
+          cache: maven
+      - name: Build, test, and generate coverage
+        run: mvn -B clean verify
+      - name: Upload JaCoCo report
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: jacoco-reports
+          path: '**/target/site/jacoco/jacoco.xml'

pom.xml

@@ -198,5 +198,31 @@
             </build>
         </profile>
     </profiles>
+    <build>
+    <plugins>
+        <!-- JaCoCo for all child modules -->
+        <plugin>
+            <groupId>org.jacoco</groupId>
+            <artifactId>jacoco-maven-plugin</artifactId>
+            <version>0.8.10</version>
+            <executions>
+                <execution>
+                    <id>prepare-agent</id>
+                    <goals>
+                        <goal>prepare-agent</goal>
+                    </goals>
+                </execution>
+                <execution>
+                    <id>report</id>
+                    <phase>verify</phase>
+                    <goals>
+                        <goal>report</goal>
+                    </goals>
+                </execution>
+            </executions>
+        </plugin>
+    </plugins>
+</build>
+
 
 </project>

spring-petclinic-admin-server/pom.xml

@@ -9,12 +9,20 @@
     <packaging>jar</packaging>
     <description>Spring Boot Admin server</description>
 
+    <!-- <parent>
+        <groupId>org.springframework.samples</groupId>
+        <artifactId>spring-petclinic-microservices</artifactId>
+        <version>3.4.1</version>
+    </parent> -->
+
     <parent>
         <groupId>org.springframework.samples</groupId>
         <artifactId>spring-petclinic-microservices</artifactId>
         <version>3.4.1</version>
+        <relativePath>../pom.xml</relativePath> <!-- path to your parent -->
     </parent>
 
+
     <properties>
         <spring-boot-admin.version>3.4.1</spring-boot-admin.version>
         <docker.image.exposed.port>9090</docker.image.exposed.port>

spring-petclinic-api-gateway/pom.xml

@@ -12,6 +12,7 @@
         <groupId>org.springframework.samples</groupId>
         <artifactId>spring-petclinic-microservices</artifactId>
         <version>3.4.1</version>
+        <relativePath>../pom.xml</relativePath>
     </parent>
 
     <properties>

spring-petclinic-config-server/pom.xml

@@ -12,6 +12,7 @@
         <groupId>org.springframework.samples</groupId>
         <artifactId>spring-petclinic-microservices</artifactId>
         <version>3.4.1</version>
+        <relativePath>../pom.xml</relativePath>
     </parent>
 
     <properties>

spring-petclinic-customers-service/pom.xml

@@ -10,8 +10,9 @@
 
 	<parent>
 		<groupId>org.springframework.samples</groupId>
-		<artifactId>spring-petclinic-microservices</artifactId>
+        <artifactId>spring-petclinic-microservices</artifactId>
         <version>3.4.1</version>
+        <relativePath>../pom.xml</relativePath>
 	</parent>
 
     <properties>

spring-petclinic-discovery-server/pom.xml

@@ -12,6 +12,7 @@
         <groupId>org.springframework.samples</groupId>
         <artifactId>spring-petclinic-microservices</artifactId>
         <version>3.4.1</version>
+        <relativePath>../pom.xml</relativePath>
     </parent>
 
     <properties>

spring-petclinic-genai-service/pom.xml

@@ -10,8 +10,9 @@
 
 	<parent>
 		<groupId>org.springframework.samples</groupId>
-		<artifactId>spring-petclinic-microservices</artifactId>
+        <artifactId>spring-petclinic-microservices</artifactId>
         <version>3.4.1</version>
+        <relativePath>../pom.xml</relativePath>
 	</parent>
 
     <properties>

spring-petclinic-vets-service/pom.xml

@@ -10,8 +10,9 @@
 
 	<parent>
 		<groupId>org.springframework.samples</groupId>
-		<artifactId>spring-petclinic-microservices</artifactId>
+        <artifactId>spring-petclinic-microservices</artifactId>
         <version>3.4.1</version>
+        <relativePath>../pom.xml</relativePath>
 	</parent>
 
     <properties>

spring-petclinic-visits-service/pom.xml

@@ -12,6 +12,7 @@
         <groupId>org.springframework.samples</groupId>
         <artifactId>spring-petclinic-microservices</artifactId>
         <version>3.4.1</version>
+        <relativePath>../pom.xml</relativePath>
     </parent>
 
     <properties>