#32 multi module: handle exception

multimodule/module-api/src/main/java/com/example/moduleapi/controller/DemoController.java

@@ -20,4 +20,9 @@ public class DemoController {
     public String find() {
         return demoService.find();
     }
+
+    @GetMapping("/exception")
+    public String exception() {
+        return demoService.exception();
+    }
 }

multimodule/module-api/src/main/java/com/example/moduleapi/exception/CustomException.java

@@ -0,0 +1,16 @@
+package com.example.moduleapi.exception;
+
+import com.example.modulecommon.enums.CodeEnum;
+import lombok.Getter;
+
+@Getter
+public class CustomException extends RuntimeException {
+    private final String returnCode;
+    private final String returnMessage;
+
+    public CustomException(CodeEnum codeEnum) {
+        super(codeEnum.getMessage());
+        this.returnCode = codeEnum.getCode();
+        this.returnMessage = codeEnum.getMessage();
+    }
+}

multimodule/module-api/src/main/java/com/example/moduleapi/exception/GlobalExceptionHandler.java

@@ -0,0 +1,27 @@
+package com.example.moduleapi.exception;
+
+import com.example.moduleapi.response.CommonResponse;
+import com.example.modulecommon.enums.CodeEnum;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(CustomException.class)
+    public CommonResponse<?> handleCustomException(CustomException e) {
+
+        return CommonResponse.builder()
+                .returnCode(e.getReturnCode())
+                .returnMessage(e.getReturnMessage())
+                .build();
+    }
+
+    @ExceptionHandler(Exception.class)
+    public CommonResponse<?> handleException(Exception e) {
+        return CommonResponse.builder()
+                .returnCode(CodeEnum.UNKNOWN_ERROR.getCode())
+                .returnMessage(CodeEnum.UNKNOWN_ERROR.getMessage())
+                .build();
+    }
+}

multimodule/module-api/src/main/java/com/example/moduleapi/response/CommonResponse.java

@@ -0,0 +1,33 @@
+package com.example.moduleapi.response;
+
+import com.example.modulecommon.enums.CodeEnum;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
+@JsonInclude(JsonInclude.Include.NON_NULL)
+public class CommonResponse<T> {
+
+    private String returnCode;
+    private String returnMessage;
+    private T info;
+
+    public CommonResponse(CodeEnum codeEnum) {
+        this.returnCode = codeEnum.getCode();
+        this.returnMessage = codeEnum.getMessage();
+    }
+
+    public CommonResponse(T info) {
+        this.returnCode = CodeEnum.SUCCESS.getCode();
+        this.returnMessage = CodeEnum.SUCCESS.getMessage();
+        this.info = info;
+    }
+
+    public CommonResponse(CodeEnum codeEnum, T info) {
+        this.returnCode = codeEnum.getCode();
+        this.returnMessage = codeEnum.getMessage();
+        this.info = info;
+    }
+}

multimodule/module-api/src/main/java/com/example/moduleapi/service/DemoService.java

@@ -1,5 +1,6 @@
 package com.example.moduleapi.service;
 
+import com.example.moduleapi.exception.CustomException;
 import com.example.modulecommon.enums.CodeEnum;
 import com.example.modulecommon.sevice.CommonDemoService;
 import lombok.RequiredArgsConstructor;
@@ -20,4 +21,8 @@ public class DemoService {
     public String find() {
         return "find";
     }
+
+    public String exception() {
+        throw new CustomException(CodeEnum.UNKNOWN_ERROR);
+    }
 }