<FIX> 예외처리 위치 변경에 따른 수정

Author: goldm0ng

src/main/java/roomescape/reservation/business/ReservationService.java

@@ -7,7 +7,6 @@
 import roomescape.reservation.persistence.ReservationRepository;
 
 import java.util.List;
-import java.util.Optional;
 
 @Service
 @RequiredArgsConstructor
@@ -24,8 +23,8 @@ public List<Reservation> checkReservations() {
         return repository.findAll();
     }
 
-    public Optional<Reservation> deleteReservation(Long reservationId) {
-        return repository.delete(reservationId);
+    public void deleteReservation(Long reservationId) {
+        repository.delete(reservationId);
     }
 
     private Reservation convertToEntity(ReservationDto reservationDto) {

src/main/java/roomescape/reservation/persistence/JdbcReservationRepository.java

@@ -8,10 +8,10 @@
 import org.springframework.jdbc.support.KeyHolder;
 import org.springframework.stereotype.Repository;
 import roomescape.reservation.domain.Reservation;
+import roomescape.reservation.presentation.exception.NotFoundReservationException;
 
 import java.sql.PreparedStatement;
 import java.util.List;
-import java.util.Optional;
 
 @Repository
 @RequiredArgsConstructor
@@ -38,14 +38,13 @@ public Reservation save(Reservation reservation) {
     }
 
     @Override
-    public Optional<Reservation> findById(Long reservationId) {
+    public Reservation findById(Long reservationId) {
         String sql = "select id, name, date, time from reservation where id = ?";
 
         try {
-            Reservation reservation = jdbcTemplate.queryForObject(sql, reservationMapper(), reservationId);
-            return Optional.of(reservation);
+            return jdbcTemplate.queryForObject(sql, reservationMapper(), reservationId);
         } catch (EmptyResultDataAccessException e) {
-            return Optional.empty();
+            throw new NotFoundReservationException();
         }
     }
 
@@ -57,16 +56,12 @@ public List<Reservation> findAll() {
     }
 
     @Override
-    public Optional<Reservation> delete(Long reservationId) {
-        Optional<Reservation> reservation = this.findById(reservationId);
-        if (reservation.isEmpty()) {
-            return Optional.empty();
-        }
+    public void delete(Long reservationId) {
+        Reservation deletedReservation = this.findById(reservationId);
 
         String sql = "delete from reservation where id = ?";
-        jdbcTemplate.update(sql, reservationId);
+        jdbcTemplate.update(sql, deletedReservation.getId());
 
-        return reservation;
     }
 
     private RowMapper<Reservation> reservationMapper() {

src/main/java/roomescape/reservation/persistence/MemoryReservationRepository.java

@@ -1,11 +1,11 @@
 package roomescape.reservation.persistence;
 
 import roomescape.reservation.domain.Reservation;
+import roomescape.reservation.presentation.exception.NotFoundReservationException;
 
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
-import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicLong;
 
@@ -25,8 +25,12 @@ public Reservation save(Reservation reservation) {
     }
 
     @Override
-    public Optional<Reservation> findById(Long reservationId) {
-        return Optional.ofNullable(reservationStore.get(reservationId));
+    public Reservation findById(Long reservationId) {
+        Reservation reservation = reservationStore.get(reservationId);
+        if (reservation == null) {
+            throw new NotFoundReservationException();
+        }
+        return reservation;
     }
 
     @Override
@@ -35,9 +39,8 @@ public List<Reservation> findAll() {
     }
 
     @Override
-    public Optional<Reservation> delete(Long reservationId) {
-        Optional<Reservation> reservation = findById(reservationId);
-
-        return Optional.ofNullable(reservationStore.remove(reservationId));
+    public void delete(Long reservationId) {
+        Reservation deletedReservation = this.findById(reservationId);
+        reservationStore.remove(deletedReservation.getId());
     }
 }

src/main/java/roomescape/reservation/persistence/ReservationRepository.java

@@ -3,16 +3,15 @@
 import roomescape.reservation.domain.Reservation;
 
 import java.util.List;
-import java.util.Optional;
 
 public interface ReservationRepository {
 
     Reservation save(Reservation reservation);
 
-    Optional<Reservation> findById(Long reservationId);
+    Reservation findById(Long reservationId);
 
     List<Reservation> findAll();
 
-    public Optional<Reservation> delete(Long reservationId);
+    void delete(Long reservationId);
 
 }

src/main/java/roomescape/reservation/presentation/ReservationController.java

@@ -6,12 +6,10 @@
 import org.springframework.web.bind.annotation.*;
 import roomescape.reservation.domain.Reservation;
 import roomescape.reservation.presentation.dto.ReservationDto;
-import roomescape.reservation.presentation.exception.NotFoundReservationException;
 import roomescape.reservation.business.ReservationService;
 
 import java.net.URI;
 import java.util.List;
-import java.util.Optional;
 
 @RestController
 @RequiredArgsConstructor
@@ -32,9 +30,7 @@ public ResponseEntity<Reservation> createReservation(@Valid @RequestBody Reserva
 
     @DeleteMapping("/reservations/{reservationId}")
     public ResponseEntity<Void> deleteReservation(@PathVariable Long reservationId) {
-        Reservation deletedReservation = reservationService.deleteReservation(reservationId)
-                .orElseThrow(NotFoundReservationException::new);
-
+        reservationService.deleteReservation(reservationId);
         return ResponseEntity.noContent().build();
     }
 }