🎨 global exception handler 추가

server/demo-reactive-app/src/main/kotlin/me/jiniworld/demohx/config/exception/ErrorResponse.kt

@@ -0,0 +1,6 @@
+package me.jiniworld.demohx.config.exception
+
+data class ErrorResponse(
+    val code: Int,
+    val message: String,
+)

server/demo-reactive-app/src/main/kotlin/me/jiniworld/demohx/config/exception/GlobalExceptionHandler.kt

@@ -0,0 +1,48 @@
+package me.jiniworld.demohx.config.exception
+
+import mu.KotlinLogging
+import org.springframework.http.ResponseEntity
+import org.springframework.http.converter.HttpMessageConversionException
+import org.springframework.web.bind.annotation.ExceptionHandler
+import org.springframework.web.bind.annotation.RestControllerAdvice
+import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException
+import javax.validation.ValidationException
+
+@RestControllerAdvice
+class GlobalExceptionHandler {
+
+    private val logger = KotlinLogging.logger {}
+
+    @ExceptionHandler(ServerException::class)
+    fun handleServerException(ex: ServerException) : ResponseEntity<ErrorResponse> {
+        logger.error { ex.message }
+
+        return ResponseEntity.status(ex.code).body(ErrorResponse(code = ex.code, message = ex.message))
+    }
+
+    @ExceptionHandler(Exception::class)
+    fun handleException(ex: Exception): ResponseEntity<ErrorResponse> {
+        logger.error { ex.message }
+
+        var message: String?
+        var code: Int
+
+        when(ex) {
+            is MethodArgumentTypeMismatchException -> {
+                message = String.format("지원하지 않는 %s 입니다. 입력 가능한 값: %s",
+                    ex.name, ex.requiredType?.enumConstants?.joinToString { it.toString() })
+                code = 400
+            }
+            is ValidationException, is HttpMessageConversionException, is IllegalArgumentException, is ArrayIndexOutOfBoundsException -> {
+                message = ex.message
+                code = 400
+            }
+            else -> {
+                message = "Internal Server Error";
+                code = 500
+            }
+        }
+
+        return ResponseEntity.status(code).body(ErrorResponse(code = code, message = message ?: ""))
+    }
+}

server/demo-reactive-app/src/main/kotlin/me/jiniworld/demohx/config/exception/ServerException.kt

@@ -0,0 +1,14 @@
+package me.jiniworld.demohx.config.exception
+
+sealed class ServerException(
+    val code: Int,
+    override val message: String,
+) : RuntimeException(message)
+
+data class NotFoundException(
+    override val message: String,
+) : ServerException(404, message)
+
+data class UnauthorizedException(
+    override val message: String = "인증 정보가 잘못되었습니다",
+) : ServerException(401, message)