feat : reduce access modifier where possible

inventory-service/src/main/java/com/example/inventoryservice/InventoryServiceApplication.java

@@ -13,7 +13,7 @@ Licensed under MIT License Copyright (c) 2021-2022 Raja Kolli.
 
 @SpringBootApplication
 @EnableConfigurationProperties({ApplicationProperties.class})
-public class InventoryServiceApplication {
+class InventoryServiceApplication {
 
     public static void main(String[] args) {
         SpringApplication.run(InventoryServiceApplication.class, args);

inventory-service/src/main/java/com/example/inventoryservice/config/Initializer.java

@@ -19,13 +19,13 @@ Licensed under MIT License Copyright (c) 2021-2022 Raja Kolli.
 
 @Component
 @Profile("local")
-public class Initializer implements CommandLineRunner {
+class Initializer implements CommandLineRunner {
 
     private final Logger log = LoggerFactory.getLogger(this.getClass());
 
     private final InventoryRepository inventoryRepository;
 
-    public Initializer(InventoryRepository inventoryRepository) {
+    Initializer(InventoryRepository inventoryRepository) {
         this.inventoryRepository = inventoryRepository;
     }
 

inventory-service/src/main/java/com/example/inventoryservice/config/KafkaListenerConfig.java

@@ -27,14 +27,14 @@ Licensed under MIT License Copyright (c) 2022 Raja Kolli.
 
 @EnableKafka
 @Configuration(proxyBeanMethods = false)
-public class KafkaListenerConfig {
+class KafkaListenerConfig {
 
     private final Logger log = LoggerFactory.getLogger(this.getClass());
 
     private final InventoryOrderManageService orderManageService;
     private final ProductManageService productManageService;
 
-    public KafkaListenerConfig(
+    KafkaListenerConfig(
             InventoryOrderManageService orderManageService,
             ProductManageService productManageService) {
         this.orderManageService = orderManageService;

inventory-service/src/main/java/com/example/inventoryservice/config/RestTemplateConfig.java

@@ -12,7 +12,7 @@ Licensed under MIT License Copyright (c) 2022 Raja Kolli.
 import org.springframework.web.client.RestTemplate;
 
 @Configuration(proxyBeanMethods = false)
-public class RestTemplateConfig {
+class RestTemplateConfig {
 
     // IMPORTANT! To instrument RestTemplate you must inject the RestTemplateBuilder
     @Bean

inventory-service/src/main/java/com/example/inventoryservice/config/SwaggerConfig.java

@@ -15,4 +15,4 @@ Licensed under MIT License Copyright (c) 2022-2023 Raja Kolli.
 @OpenAPIDefinition(
         info = @Info(title = "inventory-service", version = "v1"),
         servers = @Server(url = "${server.servlet.contextPath}"))
-public class SwaggerConfig {}
+class SwaggerConfig {}

inventory-service/src/main/java/com/example/inventoryservice/config/WebMvcConfig.java

@@ -8,20 +8,21 @@ Licensed under MIT License Copyright (c) 2021-2023 Raja Kolli.
 
 import com.example.inventoryservice.config.ApplicationProperties.Cors;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.lang.NonNull;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 @Configuration(proxyBeanMethods = false)
-public class WebMvcConfig implements WebMvcConfigurer {
+class WebMvcConfig implements WebMvcConfigurer {
 
     private final ApplicationProperties properties;
 
-    public WebMvcConfig(ApplicationProperties properties) {
+    WebMvcConfig(ApplicationProperties properties) {
         this.properties = properties;
     }
 
     @Override
-    public void addCorsMappings(CorsRegistry registry) {
+    public void addCorsMappings(@NonNull CorsRegistry registry) {
         Cors cors = properties.getCors();
         registry.addMapping(cors.getPathPattern())
                 .allowedMethods(cors.getAllowedHeaders())

inventory-service/src/main/java/com/example/inventoryservice/config/logging/LoggingAspect.java

@@ -29,13 +29,13 @@ Licensed under MIT License Copyright (c) 2021-2024 Raja Kolli.
 
 @Aspect
 @Component
-public class LoggingAspect {
+class LoggingAspect {
 
     private static final Logger log = LoggerFactory.getLogger(LoggingAspect.class);
 
     private final Environment env;
 
-    public LoggingAspect(Environment env) {
+    LoggingAspect(Environment env) {
         this.env = env;
     }
 

inventory-service/src/main/java/com/example/inventoryservice/web/controllers/InventoryController.java

@@ -30,16 +30,16 @@ Licensed under MIT License Copyright (c) 2021-2024 Raja Kolli.
 @RestController
 @RequestMapping("/api/inventory")
 @Loggable
-public class InventoryController {
+class InventoryController {
 
     private final InventoryService inventoryService;
 
-    public InventoryController(InventoryService inventoryService) {
+    InventoryController(InventoryService inventoryService) {
         this.inventoryService = inventoryService;
     }
 
     @GetMapping
-    public PagedResult<Inventory> getAllInventories(
+    PagedResult<Inventory> getAllInventories(
             @RequestParam(defaultValue = AppConstants.DEFAULT_PAGE_NUMBER, required = false)
                     int pageNo,
             @RequestParam(defaultValue = AppConstants.DEFAULT_PAGE_SIZE, required = false)
@@ -56,33 +56,32 @@ public PagedResult<Inventory> getAllInventories(
     // @CircuitBreaker(name = "default", fallbackMethod = "hardcodedResponse")
     // @RateLimiter(name = "default")
     // @Bulkhead(name = "inventory-api")
-    public ResponseEntity<Inventory> getInventoryByProductCode(@PathVariable String productCode) {
+    ResponseEntity<Inventory> getInventoryByProductCode(@PathVariable String productCode) {
         return inventoryService
                 .findInventoryByProductCode(productCode)
                 .map(ResponseEntity::ok)
                 .orElseGet(() -> ResponseEntity.notFound().build());
     }
 
     @GetMapping("/product")
-    public ResponseEntity<List<Inventory>> getInventoryByProductCodes(
-            @RequestParam List<String> codes) {
+    ResponseEntity<List<Inventory>> getInventoryByProductCodes(@RequestParam List<String> codes) {
         return ResponseEntity.ok(inventoryService.getInventoryByProductCodes(codes));
     }
 
     @GetMapping("/generate")
-    public boolean updateInventoryWithRandomValue() {
+    boolean updateInventoryWithRandomValue() {
         inventoryService.updateGeneratedInventory();
         return true;
     }
 
     @PostMapping
     @ResponseStatus(HttpStatus.CREATED)
-    public Inventory createInventory(@RequestBody @Validated InventoryRequest inventoryRequest) {
+    Inventory createInventory(@RequestBody @Validated InventoryRequest inventoryRequest) {
         return inventoryService.saveInventory(inventoryRequest);
     }
 
     @PutMapping("/{id}")
-    public ResponseEntity<Inventory> updateInventory(
+    ResponseEntity<Inventory> updateInventory(
             @PathVariable Long id, @RequestBody @Validated InventoryRequest inventoryRequest) {
         return inventoryService
                 .updateInventoryById(id, inventoryRequest)
@@ -91,7 +90,7 @@ public ResponseEntity<Inventory> updateInventory(
     }
 
     @DeleteMapping("/{id}")
-    public ResponseEntity<Inventory> deleteInventory(@PathVariable Long id) {
+    ResponseEntity<Inventory> deleteInventory(@PathVariable Long id) {
         return inventoryService
                 .findInventoryById(id)
                 .map(