fix: 시외버스 시간표 캐시확인로직 변경 (#457)

(cherry picked from commit aed2df0)

Author: dradnats1012

src/main/java/in/koreatech/koin/domain/bus/util/ExpressBusOpenApiClient.java

@@ -11,7 +11,6 @@
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.time.Clock;
-import java.time.Duration;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
 import java.util.ArrayList;
@@ -45,7 +44,6 @@
 import in.koreatech.koin.domain.bus.model.express.ExpressBusTimetable;
 import in.koreatech.koin.domain.bus.model.express.OpenApiExpressBusArrival;
 import in.koreatech.koin.domain.bus.repository.ExpressBusCacheRepository;
-import in.koreatech.koin.domain.version.model.Version;
 import in.koreatech.koin.domain.version.model.VersionType;
 import in.koreatech.koin.domain.version.repository.VersionRepository;
 
@@ -101,7 +99,8 @@ public SingleBusTimeResponse searchBusTime(
     }
 
     public List<ExpressBusRemainTime> getBusRemainTime(BusStation depart, BusStation arrival) {
-        String busCacheId = ExpressBusCache.generateId(new ExpressBusRoute(depart.name().toLowerCase(), arrival.name().toLowerCase()));
+        String busCacheId = ExpressBusCache.generateId(
+            new ExpressBusRoute(depart.name().toLowerCase(), arrival.name().toLowerCase()));
         if (!expressBusCacheRepository.existsById(busCacheId)) {
             storeRemainTimeByOpenApi(depart.name().toLowerCase(), arrival.name().toLowerCase());
         }
@@ -130,7 +129,7 @@ private void storeRemainTimeByOpenApi(String departName, String arrivalName) {
                 .toList()
         );
 
-        if(!expressBusCache.getBusInfos().isEmpty()) {
+        if (!expressBusCache.getBusInfos().isEmpty()) {
             expressBusCacheRepository.save(expressBusCache);
         }
 
@@ -140,7 +139,7 @@ private void storeRemainTimeByOpenApi(String departName, String arrivalName) {
     private JsonObject getBusApiResponse(String departName, String arrivalName) {
         try {
             URL url = getBusApiURL(departName, arrivalName);
-            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+            HttpURLConnection conn = (HttpURLConnection)url.openConnection();
             conn.setRequestMethod("GET");
             conn.setRequestProperty("Content-type", "application/json");
             BufferedReader reader;
@@ -221,14 +220,7 @@ private List<ExpressBusRemainTime> getExpressBusRemainTime(
             .toList();
     }
 
-    public boolean isCacheExpired(Version version, Clock clock) {
-        Duration duration = Duration.between(version.getUpdatedAt().toLocalTime(), LocalTime.now(clock));
-        return duration.toSeconds() < 0
-            || Duration.ofHours(ExpressBusCache.getCacheExpireHour()).toSeconds() <= duration.toSeconds();
-    }
-
     public List<? extends BusTimetable> getExpressBusTimetable(String direction) {
-        Version version = versionRepository.getByType(VersionType.EXPRESS);
         String depart = "";
         String arrival = "";
 
@@ -240,15 +232,16 @@ public List<? extends BusTimetable> getExpressBusTimetable(String direction) {
             depart = "terminal";
             arrival = "koreatech";
         }
+
         if (depart.isEmpty() || arrival.isEmpty()) {
             throw new UnsupportedOperationException();
         }
 
-        if (isCacheExpired(version, clock)) {
+        String busCacheId = ExpressBusCache.generateId(new ExpressBusRoute(depart, arrival));
+        if (!expressBusCacheRepository.existsById(busCacheId)) {
             storeRemainTimeByOpenApi(depart, arrival);
         }
 
-        String busCacheId = ExpressBusCache.generateId(new ExpressBusRoute(depart, arrival));
         ExpressBusCache expressBusCache = expressBusCacheRepository.getById(busCacheId);
         if (Objects.isNull(expressBusCache)) {
             return Collections.emptyList();