refactor/#336: 설문 마감일시에 실패시 retry 전략

src/main/java/com/haru/api/domain/moodTracker/service/MoodTrackerCommandServiceImpl.java

@@ -146,6 +146,9 @@ public void delete(
             User user,
             MoodTracker moodTracker
     ) {
+        // redis queue에서 비워줘서 중복 처리 제외
+        redisReportConsumer.removeFromQueue(moodTracker.getId());
+
         UserWorkspace foundUserWorkspace = userWorkspaceRepository.findByWorkspaceIdAndUserId(moodTracker.getWorkspace().getId(), user.getId())
                 .orElseThrow(() -> new UserWorkspaceHandler(ErrorStatus.USER_WORKSPACE_NOT_FOUND));
 

src/main/java/com/haru/api/infra/redis/RedisReportConsumer.java

@@ -25,22 +25,21 @@ public class RedisReportConsumer {
     private static final long BATCH_SIZE = 20;
 
     @Transactional
-    @Scheduled(cron = "0 0/30 * * * *") // 매시 0분, 30분 실행
+    @Scheduled(cron = "0 0/5 * * * *") // 정각부터 5분 마다 실행
     public void pollQueueEvery30Minutes() {
         long now = Instant.now().getEpochSecond();
 
-        Set<String> dueIds = redisTemplate.opsForZSet()
-                .rangeByScore(QUEUE_KEY, 0, now, 0, BATCH_SIZE);
+        while (true) {
+            Set<String> dueIds = redisTemplate.opsForZSet()
+                    .rangeByScore(QUEUE_KEY, 0, now, 0, BATCH_SIZE);
 
-        if (dueIds == null || dueIds.isEmpty()) return;
+            if (dueIds == null || dueIds.isEmpty()) break;
 
-        for (String moodTrackerId : dueIds) {
-            try {
-                // PDF, DOCX파일 바이트 배열로 생성 및 썸네일 생성 & 업로드 / DB에 keyName저장
-                moodTrackerReportService.generateAndUploadReportFileAndThumbnail(Long.parseLong(moodTrackerId));
-                redisTemplate.opsForZSet().remove(QUEUE_KEY, moodTrackerId);
-            } catch (Exception e) {
-                log.error("GPT 리포트 생성 실패: {}", moodTrackerId, e);
+            for (String id : dueIds) {
+                // Worker Queue로 push
+                redisTemplate.opsForList().leftPush("report-worker-queue", id);
+                // ZSET에서는 제거
+                redisTemplate.opsForZSet().remove(QUEUE_KEY, id);
             }
         }
     }

src/main/java/com/haru/api/infra/redis/ReportWorker.java

@@ -0,0 +1,51 @@
+package com.haru.api.infra.redis;
+
+import com.haru.api.domain.moodTracker.service.MoodTrackerReportService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.data.redis.core.StringRedisTemplate;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+@Component
+@RequiredArgsConstructor
+@Slf4j
+public class ReportWorker {
+
+    private final StringRedisTemplate redisTemplate;
+    private final MoodTrackerReportService reportService;
+    private final ExecutorService executor = Executors.newFixedThreadPool(5); // 5개 병렬 Worker
+
+    private static final String WORKER_QUEUE = "report-worker-queue";
+
+    @Scheduled(fixedDelay = 2000) // 2초마다 큐 확인
+    public void consumeTasks() {
+        String task = redisTemplate.opsForList().rightPop(WORKER_QUEUE);
+        if (task != null) {
+            Long moodTrackerId = Long.parseLong(task);
+            executor.submit(() -> process(moodTrackerId));
+        }
+    }
+
+    private void process(Long moodTrackerId) {
+        try {
+            reportService.generateAndUploadReportFileAndThumbnail(moodTrackerId);
+            log.info("Report 생성 성공: {}", moodTrackerId);
+        } catch (Exception e) {
+            log.error("Report 생성 실패 (재시도 예정): {}", moodTrackerId, e);
+
+            String key = "retry-count:" + moodTrackerId;
+            Long retry = redisTemplate.opsForValue().increment(key);
+
+            if (retry != null && retry <= 3) {
+                redisTemplate.opsForList().leftPush(WORKER_QUEUE, moodTrackerId.toString());
+            } else {
+                log.error("재시도 한계 초과, 실패 큐로 이동: {}", moodTrackerId);
+                redisTemplate.opsForList().leftPush("report-failed-queue", moodTrackerId.toString());
+            }
+        }
+    }
+}