Add linting for server

Author: esadakcam

.github/workflows/ci-cd.yml

@@ -63,7 +63,7 @@ jobs:
           pip install flake8
           flake8 . || exit 1
         working-directory: genai
-      
+
       - name: Run Tests
         run: |
           pytest --maxfail=1 --disable-warnings -q
@@ -98,6 +98,10 @@ jobs:
         run: chmod +x gradlew
         working-directory: server
 
+      - name: Lint Java code
+        run: ./gradlew check
+        working-directory: server
+
       - name: Build API Gateway microservice
         run: ./gradlew :api-gw:build
         working-directory: server

server/build.gradle.kts

@@ -3,13 +3,15 @@ plugins {
     id("io.spring.dependency-management") version "1.1.4" apply false
     id("com.google.cloud.tools.jib") version "3.4.1" apply false 
     id("java")
+    id("checkstyle")
 }
 
 subprojects {
     apply(plugin = "java")
     apply(plugin = "org.springframework.boot")
     apply(plugin = "io.spring.dependency-management")
     apply(plugin = "com.google.cloud.tools.jib")
+    apply(plugin = "checkstyle")
 
     group = "com.continuousdisappointment"
     version = "0.0.1-SNAPSHOT"
@@ -22,6 +24,11 @@ subprojects {
         mavenCentral()
     }
 
+    checkstyle {
+        toolVersion = "10.26.1"
+        configFile = rootProject.file("config/checkstyle.xml")
+    }
+
     dependencies {
 		implementation("org.springframework.boot:spring-boot-starter-web")
         implementation("org.springframework.boot:spring-boot-starter-actuator")

server/config/checkstyle.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+          "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
+          "https://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+<module name="com.puppycrawl.tools.checkstyle.Checker">
+    <property name="charset" value="UTF-8"/>
+
+    <!-- Google's Checkstyle config as a base -->
+    <module name="com.puppycrawl.tools.checkstyle.checks.header.HeaderCheck">
+        <!-- You can configure header checks here -->
+    </module>
+
+    <module name="com.puppycrawl.tools.checkstyle.TreeWalker">
+        <module name="com.puppycrawl.tools.checkstyle.checks.imports.UnusedImportsCheck"/>
+        <module name="com.puppycrawl.tools.checkstyle.checks.naming.ConstantNameCheck"/>
+    </module>
+</module>