Add Spotless Check to maintain consistency (opensearch-project#3386)

Add Spotless check step to main branch to maintain workflow consistency
with 2.x branch. While version compatibility is only an issue in 2.x,
maintaining parallel workflow structure prevents branch drift and
simplifies future maintenance.

Signed-off-by: rithin-pullela-aws <[email protected]>

Author: rithin-pullela-aws

.github/workflows/CI-workflow.yml

@@ -22,8 +22,19 @@ jobs:
     with:
       product: opensearch
 
+  spotless:
+    steps:
+      - uses: actions/checkout@v4
+      # Spotless requires JDK 17+
+      - name: Setup Java 21
+        uses: actions/setup-java@v1
+        with:
+          java-version: 21
+      - name: Spotless Check
+        run: ./gradlew spotlessCheck
+
   Build-ml-linux:
-    needs: [Get-Require-Approval, Get-CI-Image-Tag]
+    needs: [Get-Require-Approval, Get-CI-Image-Tag, spotless]
     strategy:
       matrix:
         java: [21]
@@ -66,9 +77,9 @@ jobs:
                                export COHERE_KEY=`aws secretsmanager get-secret-value --secret-id github_cohere_key --query SecretString --output text` &&
                                echo "::add-mask::$OPENAI_KEY" &&
                                echo "::add-mask::$COHERE_KEY" &&
-                               echo "build and run tests" && ./gradlew build &&
-                               echo "Publish to Maven Local" && ./gradlew publishToMavenLocal &&
-                               echo "Multi Nodes Integration Testing" && ./gradlew integTest -PnumNodes=3'
+                               echo "build and run tests" && ./gradlew build -x spotlessJava &&
+                               echo "Publish to Maven Local" && ./gradlew publishToMavenLocal -x spotlessJava &&
+                               echo "Multi Nodes Integration Testing" && ./gradlew integTest -PnumNodes=3 -x spotlessJava'
           plugin=`basename $(ls plugin/build/distributions/*.zip)`
           echo $plugin
           mv -v plugin/build/distributions/$plugin ./
@@ -88,7 +99,7 @@ jobs:
 
 
   Test-ml-linux-docker:
-    needs: [Get-Require-Approval, Build-ml-linux]
+    needs: [Get-Require-Approval, Build-ml-linux, spotless]
     strategy:
       matrix:
         java: [21]
@@ -172,10 +183,10 @@ jobs:
           if [ $security -gt 0 ]
           then
             echo "Security plugin is available"
-            ./gradlew integTest -Dtests.rest.cluster=localhost:9200 -Dtests.cluster=localhost:9200 -Dtests.clustername="docker-cluster" -Dhttps=true -Duser=admin -Dpassword=${{ steps.genpass.outputs.password }}
+            ./gradlew integTest -Dtests.rest.cluster=localhost:9200 -Dtests.cluster=localhost:9200 -Dtests.clustername="docker-cluster" -Dhttps=true -Duser=admin -Dpassword=${{ steps.genpass.outputs.password }} -x spotlessJava
           else
             echo "Security plugin is NOT available"
-            ./gradlew integTest -Dtests.rest.cluster=localhost:9200 -Dtests.cluster=localhost:9200 -Dtests.clustername="docker-cluster"
+            ./gradlew integTest -Dtests.rest.cluster=localhost:9200 -Dtests.cluster=localhost:9200 -Dtests.clustername="docker-cluster" -x spotlessJava
           fi
 
       - name: Upload Coverage Report
@@ -190,7 +201,7 @@ jobs:
         java: [21]
     name: Build and Test MLCommons Plugin on Windows
     if: github.repository == 'opensearch-project/ml-commons'
-    needs: [Get-Require-Approval]
+    needs: [Get-Require-Approval, spotless]
     environment: ${{ needs.Get-Require-Approval.outputs.is-require-approval }}
     runs-on: windows-latest
 
@@ -218,10 +229,10 @@ jobs:
           export COHERE_KEY=$(aws secretsmanager get-secret-value --secret-id github_cohere_key --query SecretString --output text)
           echo "::add-mask::$OPENAI_KEY"
           echo "::add-mask::$COHERE_KEY"
-          ./gradlew.bat build
+          ./gradlew.bat build -x spotlessJava
       - name: Publish to Maven Local
         run: |
-          ./gradlew publishToMavenLocal
+          ./gradlew publishToMavenLocal -x spotlessJava
 #      - name: Multi Nodes Integration Testing
 #        shell: bash
 #        run: |