actions support for gradle examples

Author: chernser

.github/workflows/build.yml

@@ -59,7 +59,10 @@ jobs:
         run: |
           export LIB_VER=$(grep '<revision>' pom.xml | sed -e 's|[[:space:]]*<[/]*revision>[[:space:]]*||g')
           find `pwd`/examples -type f -name pom.xml -exec sed -i -e "s|\(<clickhouse-java.version>\).*\(<\)|\1$LIB_VER\2|g" {} \;
-          for d in $(ls -d `pwd`/examples/*/); do cd $d && mvn  --batch-mode --no-transfer-progress clean compile; done
+          for d in $(ls -d `pwd`/examples/*/); do \
+            if [ -e $d/pom.xml ]; then cd $d && mvn  --batch-mode --no-transfer-progress clean compile; fi;
+            if [ -e $d/gradlew ]; then cd $d && ./gradlew clean build; fi;
+          done
       - name: Upload test results
         uses: actions/upload-artifact@v4
         if: failure()