🔀 :: (#132) 게시글 엔티티 수정

src/main/java/com/example/moizaspringserver/domain/feed/entity/PublicFeed.java

@@ -42,6 +42,13 @@ public class PublicFeed extends BaseTimeEntity {
     @ColumnDefault("0")
     private Integer likeCount;
 
+    @NotNull
+    @ColumnDefault("0")
+    private Integer viewCount;
+    public void addViewCounts(Integer views) {
+        viewCount += views;
+    }
+
     @Builder
     public PublicFeed(String title, String content, Integer likeCount, Feed feed) {
         this.title = title;

src/main/java/com/example/moizaspringserver/domain/feed/facade/ViewCountFacade.java

@@ -0,0 +1,47 @@
+package com.example.moizaspringserver.domain.feed.facade;
+
+import com.example.moizaspringserver.domain.feed.entity.PublicFeed;
+import com.example.moizaspringserver.domain.feed.exception.FeedNotFoundException;
+import com.example.moizaspringserver.domain.feed.properties.ViewCountProperties;
+import com.example.moizaspringserver.domain.feed.respository.PublicFeedRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+@RequiredArgsConstructor
+@Component
+public class ViewCountFacade {
+
+    private final ViewCountProperties viewCountProperties;
+    private final PublicFeedRepository publicFeedRepository;
+    private final Map<Integer, Integer> viewCounts = new ConcurrentHashMap<>();
+
+    @Transactional(readOnly = true)
+    public Integer getViewCountOf(Integer feedId) {
+        return publicFeedRepository.findById(feedId)
+                .orElseThrow(() -> FeedNotFoundException.EXCEPTION)
+                .getViewCount();
+    }
+
+    @Transactional
+    public void flushViewCount(Integer feedId) {
+        PublicFeed feed = publicFeedRepository.findById(feedId)
+                .orElseThrow(() -> FeedNotFoundException.EXCEPTION);
+
+        feed.addViewCounts(viewCounts.get(feedId));
+        viewCounts.remove(feedId);
+    }
+
+    @Transactional
+    public void addViewCountOf(Integer feedId) {
+        viewCounts.computeIfAbsent(feedId, key -> viewCounts.put(key, 0));
+
+        viewCounts.put(feedId, viewCounts.get(feedId));
+
+        if(viewCounts.get(feedId) >= viewCountProperties.getCacheMaximum())
+            flushViewCount(feedId);
+    }
+}

src/main/java/com/example/moizaspringserver/domain/feed/properties/ViewCountProperties.java

@@ -0,0 +1,14 @@
+package com.example.moizaspringserver.domain.feed.properties;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.ConstructorBinding;
+
+@Getter
+@ConstructorBinding
+@AllArgsConstructor
+@ConfigurationProperties(prefix = "feed.viewcount")
+public class ViewCountProperties {
+    private final Integer cacheMaximum;
+}

src/main/resources/application.yml

@@ -36,4 +36,8 @@ aws:
   access-key : ${SES_ACCESS}
   secret-key : ${SES_SECRET}
   ses-source : ${SES_SOURCE}
-  aws-regions : ${AWS_REGIONS:ap-northeast-2}
+  aws-regions : ${AWS_REGIONS:ap-northeast-2}
+
+feed:
+  viewcount:
+    cache-maximum: ${VIEWCOUNT_CACHE_MAXIMUM}