#31 loan: common response

loan/src/main/java/com/example/loan/LoanApplication.java

@@ -2,7 +2,9 @@ package com.example.loan;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
 
+@EnableJpaAuditing
 @SpringBootApplication
 public class LoanApplication {
 

loan/src/main/java/com/example/loan/controller/AbstractController.java

@@ -0,0 +1,23 @@
+package com.example.loan.controller;
+
+import com.example.loan.dto.ResponseDto;
+import com.example.loan.dto.ResultObject;
+
+public abstract class AbstractController {
+
+    protected <T> ResponseDto<T> ok() {
+        return ok(null, ResultObject.getSuccess());
+    }
+
+    protected <T> ResponseDto<T> ok(T data) {
+        return ok(data, ResultObject.getSuccess());
+    }
+
+    protected <T> ResponseDto<T> ok(T data, ResultObject result) {
+        ResponseDto<T> obj = new ResponseDto<>();
+        obj.setResult(result);
+        obj.setData(data);
+
+        return obj;
+    }
+}

loan/src/main/java/com/example/loan/dto/ResponseDto.java

@@ -0,0 +1,44 @@
+package com.example.loan.dto;
+
+import com.example.loan.exception.BaseException;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import lombok.*;
+
+import java.io.Serializable;
+
+@Getter
+@Setter
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+@JsonInclude
+public class ResponseDto<T> implements Serializable {
+
+  private ResultObject result;
+
+  private T data;
+
+  public ResponseDto(ResultObject result) {
+    this.result = result;
+  }
+
+  public ResponseDto(T data) {
+    this.data = data;
+  }
+
+  public static <T> ResponseDto<T> ok() {
+    return new ResponseDto<>(ResultObject.getSuccess());
+  }
+
+  public static <T> ResponseDto<T> ok(T data) {
+    return new ResponseDto<>(ResultObject.getSuccess(), data);
+  }
+
+  public static <T> ResponseDto<T> response(T data) {
+    return new ResponseDto<>(ResultObject.getSuccess(), data);
+  }
+
+  public ResponseDto(BaseException ex) {
+    this.result = new ResultObject(ex);
+  }
+}

loan/src/main/java/com/example/loan/dto/ResultObject.java

@@ -0,0 +1,42 @@
+package com.example.loan.dto;
+
+import java.io.Serializable;
+
+import com.example.loan.exception.BaseException;
+import com.example.loan.exception.ResultType;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class ResultObject implements Serializable {
+
+  public String code;
+
+  public String desc;
+
+  public ResultObject(ResultType resultType) {
+    this.code = resultType.getCode();
+    this.desc = resultType.getDesc();
+  }
+
+  public ResultObject(ResultType resultCode, String message) {
+    this.code = resultCode.getCode();
+    this.desc = message;
+  }
+
+  public ResultObject(BaseException e) {
+    this.code = e.getCode();
+    this.desc = e.getDesc();
+  }
+
+  public static ResultObject getSuccess() {
+    return new ResultObject(ResultType.SUCCESS);
+  }
+}

loan/src/main/java/com/example/loan/exception/APIExceptionHandler.java

@@ -0,0 +1,24 @@
+package com.example.loan.exception;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.example.loan.dto.ResponseDto;
+import com.example.loan.dto.ResultObject;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@Slf4j
+@RestControllerAdvice
+public class APIExceptionHandler extends RuntimeException {
+
+    @ExceptionHandler(BaseException.class)
+    protected ResponseDto<ResultObject> handleBaseException(
+            BaseException e,
+            HttpServletRequest request,
+            HttpServletResponse response) {
+        log.error(e.getMessage(), e);
+        return new ResponseDto<>(e);
+    }
+}

loan/src/main/java/com/example/loan/exception/BaseException.java

@@ -0,0 +1,28 @@
+package com.example.loan.exception;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+public class BaseException extends RuntimeException {
+
+  private String code = "";
+  private String desc = "";
+  private String extraMessage = "";
+
+  public BaseException(ResultType resultType) {
+    super(resultType.getDesc());
+    this.code = resultType.getCode();
+    this.desc = resultType.getDesc();
+  }
+
+  public BaseException(ResultType resultType, String extraMessage) {
+    super(resultType.getDesc() + " - " + extraMessage);
+    this.code = resultType.getCode();
+    this.desc = resultType.getDesc();
+    this.extraMessage = extraMessage;
+  }
+}

loan/src/main/java/com/example/loan/exception/ResultType.java

@@ -0,0 +1,16 @@
+package com.example.loan.exception;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public enum ResultType {
+
+  SUCCESS("0000", "success"),
+
+  SYSTEM_ERROR("9000", "system error");
+
+  private final String code;
+  private final String desc;
+}