[FEAT] StaticsCache 추가

server/src/main/java/com/talkka/server/bus/service/BusStaticsService.java

@@ -13,6 +13,8 @@
 import com.talkka.server.bus.dao.BusRouteStationRepository;
 import com.talkka.server.bus.dto.BusStaticsDto;
 import com.talkka.server.bus.exception.BusRouteNotFoundException;
+import com.talkka.server.bus.util.StaticsCache;
+import com.talkka.server.bus.util.StaticsCacheKey;
 
 import lombok.RequiredArgsConstructor;
 
@@ -21,6 +23,7 @@
 public class BusStaticsService {
 	private final BusRemainSeatRepository busRemainSeatRepository;
 	private final BusRouteStationRepository busRouteStationRepository;
+	private final StaticsCache staticsCache;
 
 	/**
 	 * 버스 경로 정보를 조회합니다.
@@ -43,6 +46,11 @@ public BusStaticsDto getRouteStationStatics(
 		Long week
 	) {
 		// 타겟 노선정거장 조회
+		var key = new StaticsCacheKey(routeStationId, stationNum, time, timeRangeMinute, week);
+		if (staticsCache.get(key).isPresent()) {
+			return staticsCache.get(key).get();
+		}
+
 		var routeStation = busRouteStationRepository.findById(routeStationId)
 			.orElseThrow(() -> new BusRouteNotFoundException(routeStationId));
 		Long routeId = routeStation.getRoute().getId();
@@ -82,6 +90,8 @@ public BusStaticsDto getRouteStationStatics(
 				)
 			);
 		}
+
+		staticsCache.put(key, new BusStaticsDto(time, routeStationList, data));
 		return new BusStaticsDto(
 			time,
 			routeStationList,

server/src/main/java/com/talkka/server/bus/util/StaticsCache.java

@@ -0,0 +1,14 @@
+package com.talkka.server.bus.util;
+
+import org.springframework.stereotype.Component;
+
+import com.talkka.server.bus.dto.BusStaticsDto;
+import com.talkka.server.common.util.MemoryCachedStorage;
+
+@Component
+public class StaticsCache extends MemoryCachedStorage<StaticsCacheKey, BusStaticsDto> {
+	public StaticsCache() {
+		// 1일
+		super(60 * 60 * 24 * 1);
+	}
+}

server/src/main/java/com/talkka/server/bus/util/StaticsCacheKey.java

@@ -0,0 +1,33 @@
+package com.talkka.server.bus.util;
+
+import java.time.LocalDateTime;
+
+public record StaticsCacheKey(
+	Long routeStationId,
+	Integer stationNum,
+	LocalDateTime time,
+	Integer timeRangeMinute,
+	Long week
+) {
+	@Override
+	public boolean equals(Object o) {
+		if (this == o)
+			return true;
+		if (o == null || getClass() != o.getClass())
+			return false;
+
+		StaticsCacheKey that = (StaticsCacheKey)o;
+		return week.equals(that.week) && stationNum.equals(that.stationNum) && time.equals(that.time)
+			&& routeStationId.equals(that.routeStationId) && timeRangeMinute.equals(that.timeRangeMinute);
+	}
+
+	@Override
+	public int hashCode() {
+		int result = routeStationId.hashCode();
+		result = 31 * result + stationNum.hashCode();
+		result = 31 * result + time.hashCode();
+		result = 31 * result + timeRangeMinute.hashCode();
+		result = 31 * result + week.hashCode();
+		return result;
+	}
+}