Add Global Exception Handler Classes and OrderGlobalException.java classes

common/common-application/pom.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>common</artifactId>
+        <groupId>com.food.order</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>common-application</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

common/common-application/src/main/java/com/food/order/system/application/handler/ErrorDTO.java

@@ -0,0 +1,7 @@
+package com.food.order.system.application.handler;
+
+import lombok.Builder;
+
+@Builder
+public record ErrorDTO(String code, String message) {
+}

common/common-application/src/main/java/com/food/order/system/application/handler/GlobalExceptionHandler.java

@@ -0,0 +1,59 @@
+package com.food.order.system.application.handler;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+import javax.validation.ConstraintViolation;
+import javax.validation.ConstraintViolationException;
+import javax.validation.ValidationException;
+import java.util.stream.Collectors;
+
+@Slf4j
+@ControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
+    @ExceptionHandler(value = {Exception.class})
+    @ResponseBody
+    public ErrorDTO handleOrderDomainException(Exception e) {
+        log.error("Error occurred: {}", e.getMessage());
+        return ErrorDTO.builder()
+                .code(HttpStatus.INTERNAL_SERVER_ERROR.getReasonPhrase())
+                .message("Unknown error occurred")
+                .build();
+    }
+
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(value = {ValidationException.class})
+    @ResponseBody
+    public ErrorDTO handleOrderDomainException(ValidationException e) {
+        ErrorDTO errorDTO;
+        if (e instanceof ConstraintViolationException) {
+            String violations = extractViolationsFromException((ConstraintViolationException) e);
+            log.error("Error occurred: {}", violations);
+            errorDTO = ErrorDTO.builder()
+                    .code(HttpStatus.BAD_REQUEST.getReasonPhrase())
+                    .message(violations)
+                    .build();
+        }
+        else {
+            log.error("Error occurred: {}", e.getMessage());
+            errorDTO = ErrorDTO.builder()
+                    .code(HttpStatus.BAD_REQUEST.getReasonPhrase())
+                    .message(e.getMessage())
+                    .build();
+        }
+        return errorDTO;
+    }
+
+    private String extractViolationsFromException(ConstraintViolationException e) {
+        return e.getConstraintViolations()
+                .stream()
+                .map(ConstraintViolation::getMessage)
+                .collect(Collectors.joining("->"));
+    }
+}

common/pom.xml

@@ -13,6 +13,7 @@
     <packaging>pom</packaging>
     <modules>
         <module>common-domain</module>
+        <module>common-application</module>
     </modules>
 
     <properties>