feat: custom exception 예제 코드 추가

common/src/main/java/org/depromeet/spot/common/exception/member/MemberErrorCode.java

@@ -0,0 +1,27 @@
+package org.depromeet.spot.common.exception.member;
+
+import org.depromeet.spot.common.exception.ErrorCode;
+import org.springframework.http.HttpStatus;
+
+import lombok.Getter;
+
+@Getter
+public enum MemberErrorCode implements ErrorCode {
+    MEMBER_NOT_FOUND(HttpStatus.NOT_FOUND, "M001", "요청 유저가 존재하지 않습니다."),
+    ;
+
+    private final HttpStatus status;
+    private final String code;
+    private String message;
+
+    MemberErrorCode(HttpStatus status, String code, String message) {
+        this.status = status;
+        this.code = code;
+        this.message = message;
+    }
+
+    public MemberErrorCode appended(Object o) {
+        message = message + " {" + o.toString() + "}";
+        return this;
+    }
+}

common/src/main/java/org/depromeet/spot/common/exception/member/MemberException.java

@@ -0,0 +1,20 @@
+package org.depromeet.spot.common.exception.member;
+
+import org.depromeet.spot.common.exception.BusinessException;
+
+public abstract class MemberException extends BusinessException {
+
+    protected MemberException(MemberErrorCode errorCode) {
+        super(errorCode);
+    }
+
+    public static class MemberNotFoundException extends MemberException {
+        public MemberNotFoundException() {
+            super(MemberErrorCode.MEMBER_NOT_FOUND);
+        }
+
+        public MemberNotFoundException(Object o) {
+            super(MemberErrorCode.MEMBER_NOT_FOUND.appended(o));
+        }
+    }
+}

usecase/build.gradle.kts

@@ -1,4 +1,5 @@
 dependencies {
+    implementation(project(":common"))
     implementation(project(":domain"))
 
     // spring

usecase/src/main/java/org/depromeet/spot/usecase/service/MemberService.java

@@ -2,13 +2,13 @@
 
 import java.util.List;
 
+import org.depromeet.spot.common.exception.member.MemberException.MemberNotFoundException;
 import org.depromeet.spot.domain.member.Member;
 import org.depromeet.spot.usecase.port.in.MemberUsecase;
 import org.depromeet.spot.usecase.port.out.MemberRepository;
 import org.springframework.stereotype.Service;
 
 import lombok.RequiredArgsConstructor;
-import lombok.val;
 
 @Service
 @RequiredArgsConstructor
@@ -18,12 +18,16 @@ public class MemberService implements MemberUsecase {
 
     @Override
     public Member create(final String name) {
-        val member = new Member(null, name);
+        var member = new Member(null, name);
         return memberRepository.save(member);
     }
 
     @Override
     public List<Member> findByName(final String name) {
-        return memberRepository.findByName(name);
+        var members = memberRepository.findByName(name);
+        if (members.isEmpty()) {
+            throw new MemberNotFoundException(name);
+        }
+        return members;
     }
 }