feature: 사용자 액션 추적 이벤트 추가 및 좋아요 이벤트 확장

- `UserActionTrackEvent` 인터페이스 추가로 사용자 활동 추적 기반 도메인 설계 도입.
- `LikeActionTrackEvent` 구현체 추가로 좋아요/취소 이벤트 데이터 추적 가능.
- `LikeFacade`에 사용자 활동 이벤트 발행 로직 추가.
- 이벤트 기반 아키텍처와 데이터 추적 연계 강화.

Author: yeonjiyeon

apps/commerce-api/src/main/java/com/loopers/application/event/DeadLetterQueueProcessor.java

@@ -4,13 +4,15 @@
 import com.loopers.domain.event.DomainEvent;
 import com.loopers.domain.event.FailedEvent;
 import com.loopers.infrastructure.event.FailedEventRepository;
-import java.util.List;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.util.List;
+
 @Component
 @RequiredArgsConstructor
 public class DeadLetterQueueProcessor {
@@ -22,7 +24,7 @@ public class DeadLetterQueueProcessor {
   private static final int MAX_RETRY_COUNT = 5;
 
   @Scheduled(fixedRate = 300000)
-  @Transactional
+  @Transactional 
   public void retryFailedEvents() {
 
     List<FailedEvent> eventsToRetry = failedEventRepository.findByRetryCountLessThan(MAX_RETRY_COUNT);
@@ -39,7 +41,7 @@ public void retryFailedEvents() {
         failedEventRepository.delete(failedEvent);
 
       } catch (Exception e) {
-        failedEvent.incrementRetryCount();
+        failedEvent.incrementRetryCount(); 
         failedEventRepository.save(failedEvent);
       }
     }

apps/commerce-api/src/main/java/com/loopers/application/like/LikeActionTrackEvent.java

@@ -0,0 +1,30 @@
+package com.loopers.application.like;
+
+import com.loopers.domain.event.UserActionTrackEvent;
+import java.time.ZonedDateTime;
+import java.util.Map;
+
+public record LikeActionTrackEvent(
+    Long userId,
+    Long productId,
+    String action,
+
+    ZonedDateTime eventTime,
+    Map<String, Object> properties
+
+) implements UserActionTrackEvent {
+
+  public LikeActionTrackEvent(Long userId, Long productId, String action) {
+    this(userId, productId, action, ZonedDateTime.now(), Map.of());
+  }
+
+  @Override
+  public String eventType() {
+    return "LIKE_ACTION";
+  }
+
+  @Override
+  public Map<String, Object> getProperties() {
+    return properties;
+  }
+}

apps/commerce-api/src/main/java/com/loopers/application/like/LikeFacade.java

@@ -31,6 +31,12 @@ public LikeInfo like(long userId, long productId) {
 
     eventPublisher.publishEvent(new LikeCreatedEvent(productId, 1));
 
+    eventPublisher.publishEvent(new LikeActionTrackEvent(
+        userId,
+        productId,
+        "LIKE"
+    ));
+
     return LikeInfo.from(newLike, product.getLikeCount());
   }
 
@@ -41,6 +47,12 @@ public int unLike(long userId, long productId) {
 
     eventPublisher.publishEvent(new LikeCreatedEvent(productId, -1));
 
+    eventPublisher.publishEvent(new LikeActionTrackEvent(
+        userId,
+        productId,
+        "UNLIKE"
+    ));
+
     return productService.getProduct(productId).getLikeCount();
 
   }

apps/commerce-api/src/main/java/com/loopers/domain/event/UserActionTrackEvent.java

@@ -0,0 +1,11 @@
+package com.loopers.domain.event;
+
+import java.time.ZonedDateTime;
+import java.util.Map;
+
+public interface UserActionTrackEvent {
+  Long userId();
+  String eventType();
+  ZonedDateTime eventTime();
+  Map<String, Object> getProperties();
+}