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@jeonga1022 jeonga1022 commented Jan 2, 2026

๐Ÿ“Œ Summary

1. ์›๋ณธ ๋ฐ์ดํ„ฐ ์ ์žฌ ๊ตฌ์กฐ ๊ฐœ์„ 

  • ProductMetrics ์—”ํ‹ฐํ‹ฐ์— date, viewCount ์ปฌ๋Ÿผ ์ถ”๊ฐ€
  • Consumer์—์„œ ์ผ๋ณ„๋กœ ์ง€ํ‘œ๋ฅผ ๋ˆ„์  ์ €์žฅํ•˜๋„๋ก ๋ณ€๊ฒฝ

2. Spring Batch ์ฃผ๊ฐ„/์›”๊ฐ„ ์ง‘๊ณ„ Job

  • WeeklyRankingJobConfig: 7์ผ์น˜ ๋ฐ์ดํ„ฐ๋ฅผ ์ง‘๊ณ„ํ•˜์—ฌ mv_product_rank_weekly ํ…Œ์ด๋ธ”์— ์ €์žฅ
  • MonthlyRankingJobConfig: 30์ผ์น˜ ๋ฐ์ดํ„ฐ๋ฅผ ์ง‘๊ณ„ํ•˜์—ฌ mv_product_rank_monthly ํ…Œ์ด๋ธ”์— ์ €์žฅ
  • Materialized View ํŒจํ„ด ์ ์šฉ (๋ฏธ๋ฆฌ ๊ณ„์‚ฐ โ†’ ๋‹จ์ˆœ ์กฐํšŒ)

3. Ranking API ํ™•์žฅ

  • GET /api/v1/rankings?period=daily|weekly|monthly
  • period ํŒŒ๋ผ๋ฏธํ„ฐ๋กœ ์ผ๊ฐ„/์ฃผ๊ฐ„/์›”๊ฐ„ ๋žญํ‚น ์กฐํšŒ ๊ฐ€๋Šฅ

๐Ÿ’ฌ Review Points

1. @Modifying + @transactional ์กฐํ•ฉ

๋ฌธ์ œ: StepExecutionListener.beforeStep()์€ Spring Batch์˜ ํŠธ๋žœ์žญ์…˜ ์ปจํ…์ŠคํŠธ ๋ฐ–์—์„œ ์‹คํ–‰๋ฉ๋‹ˆ๋‹ค. ์ด ์‹œ์ ์— @Modifying ์ฟผ๋ฆฌ๋ฅผ ํ˜ธ์ถœํ•˜๋ฉด ํŠธ๋žœ์žญ์…˜์ด ์—†์–ด์„œ ์—๋Ÿฌ๊ฐ€ ๋ฐœ์ƒํ•ฉ๋‹ˆ๋‹ค.

ํ•ด๊ฒฐ: Repository ๋ฉ”์„œ๋“œ์— @Transactional์„ ๋ช…์‹œ์ ์œผ๋กœ ์ถ”๊ฐ€ํ–ˆ์Šต๋‹ˆ๋‹ค.

@Modifying
@Transactional
@Query("DELETE FROM ProductRankWeekly p WHERE p.periodStart = :periodStart")
void deleteByPeriodStart(@Param("periodStart") LocalDate periodStart);

์งˆ๋ฌธ: ๋‹จ์ผ DELETE ์ฟผ๋ฆฌ๋ผ์„œ Service๋กœ ๊ฐ์‹ธ์ง€ ์•Š๊ณ  Repository์— ์ง์ ‘ @Transactional์„ ๋ถ™์˜€๋Š”๋ฐ, ์ด๋Ÿฐ ๊ฒฝ์šฐ ๋ณดํ†ต ์–ด๋–ป๊ฒŒ ํ•˜์‹œ๋‚˜์š”? ๋‹จ์ˆœ ์ฟผ๋ฆฌ์—ฌ๋„ Service ๋ ˆ์ด์–ด๋ฅผ ๊ฑฐ์น˜๋Š” ๊ฒŒ ๋” ์ผ๋ฐ˜์ ์ธ์ง€ ๊ถ๊ธˆํ•ฉ๋‹ˆ๋‹ค.

2. Redis ์บ์‹œ Fallback ์ „๋žต

๋ฌธ์ œ: ๋ฐฐ์น˜๊ฐ€ beforeStep DELETE โ†’ chunk INSERT ์ˆœ์„œ๋กœ ๋™์ž‘ํ•ฉ๋‹ˆ๋‹ค. DELETE ํ›„ INSERT๊ฐ€ ์‹คํŒจํ•˜๋ฉด DB๊ฐ€ ๋น„์–ด์žˆ๋Š” ์ƒํƒœ๊ฐ€ ๋˜์–ด API์—์„œ ๋นˆ ์‘๋‹ต์ด ๋ฐ˜ํ™˜๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

ํ•ด๊ฒฐ: Redis ์บ์‹œ๋ฅผ fallback์œผ๋กœ ์ถ”๊ฐ€ํ–ˆ์Šต๋‹ˆ๋‹ค.

  • API ์กฐํšŒ ์‹œ Redis ์บ์‹œ ๋จผ์ € ํ™•์ธ โ†’ ์—†์œผ๋ฉด DB ์กฐํšŒ ํ›„ ์บ์‹œ (Cache-Aside ํŒจํ„ด)
  • ๋ฐฐ์น˜ ์™„๋ฃŒ ํ›„ afterStep์—์„œ Redis ์บ์‹œ ๊ฐฑ์‹  (TTL 25์‹œ๊ฐ„)

์งˆ๋ฌธ: UPSERT๋Š” DB์— ํ•ญ์ƒ ๋ฐ์ดํ„ฐ๊ฐ€ ์กด์žฌํ•˜์ง€๋งŒ ๋žญํ‚น์—์„œ ๋น ์ง„ ์ƒํ’ˆ ์‚ญ์ œ ๋กœ์ง์ด ํ•„์š”ํ•˜๊ณ , ์บ์‹œ ๋ฐฉ์‹์€ ๋นˆ ์‘๋‹ต์„ ๋ฐฉ์ง€ํ•˜์ง€๋งŒ Redis ์˜์กด์„ฑ์ด ์ƒ๊น๋‹ˆ๋‹ค. ๋žญํ‚น์ฒ˜๋Ÿผ ์‹ค์‹œ๊ฐ„ ์ •ํ•ฉ์„ฑ์ด ๋œ ์ค‘์š”ํ•œ ๋„๋ฉ”์ธ์—์„œ ์บ์‹œ ๋ฐฉ์‹์„ ์„ ํƒํ•œ ๊ฑด ๊ดœ์ฐฎ์„๊นŒ์š”?

โœ… Checklist

๐Ÿงฑ Spring Batch

  • Spring Batch Job ์„ ์ž‘์„ฑํ•˜๊ณ , ํŒŒ๋ผ๋ฏธํ„ฐ ๊ธฐ๋ฐ˜์œผ๋กœ ๋™์ž‘์‹œํ‚ฌ ์ˆ˜ ์žˆ๋‹ค.
  • Chunk Oriented Processing (Reader/Processor/Writer or Tasklet) ๊ธฐ๋ฐ˜์˜ ๋ฐฐ์น˜ ์ฒ˜๋ฆฌ๋ฅผ ๊ตฌํ˜„ํ–ˆ๋‹ค.
  • ์ง‘๊ณ„ ๊ฒฐ๊ณผ๋ฅผ ์ €์žฅํ•  Materialized View ์˜ ๊ตฌ์กฐ๋ฅผ ์„ค๊ณ„ํ•˜๊ณ  ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ์ ์žฌํ–ˆ๋‹ค.

๐Ÿงฉ Ranking API

  • API ๊ฐ€ ์ผ๊ฐ„, ์ฃผ๊ฐ„, ์›”๊ฐ„ ๋žญํ‚น์„ ์ œ๊ณตํ•˜๋ฉฐ ์กฐํšŒํ•ด์•ผ ํ•˜๋Š” ํ˜•ํƒœ์— ๋”ฐ๋ผ ์ ์ ˆํ•œ ๋ฐ์ดํ„ฐ๋ฅผ ๊ธฐ๋ฐ˜์œผ๋กœ ๋žญํ‚น์„ ์ œ๊ณตํ•œ๋‹ค.

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Walkthrough

Spring Batch ์˜์กด์„ฑ์„ ์ถ”๊ฐ€ํ•˜๊ณ , Redis ๊ธฐ๋ฐ˜ ์‹ค์‹œ๊ฐ„ ๋žญํ‚น ์‹œ์Šคํ…œ๊ณผ ๋ฐฐ์น˜ ๊ธฐ๋ฐ˜ ์ฃผ๊ฐ„/์›”๊ฐ„ ๋žญํ‚น์„ ๊ตฌํ˜„ํ•ฉ๋‹ˆ๋‹ค. ์ œํ’ˆ ์กฐํšŒ ์‹œ ์ด๋ฒคํŠธ๋ฅผ ๋ฐœํ–‰ํ•˜๊ณ  ์นดํ”„์นด ์ปจ์Šˆ๋จธ๋กœ ๋ฉ”ํŠธ๋ฆญ๊ณผ ๋žญํ‚น์„ ๋ˆ„์ ํ•˜๋ฉฐ, ์ƒˆ๋กœ์šด RankingFacade์™€ API๋กœ ์—ฌ๋Ÿฌ ๊ธฐ๊ฐ„๋ณ„ ๋žญํ‚น์„ ์กฐํšŒํ•  ์ˆ˜ ์žˆ๋„๋ก ํ™•์žฅํ•ฉ๋‹ˆ๋‹ค.

Changes

์‘์ง‘๋œ ์ฃผ์ œ / ํŒŒ์ผ(๋“ค) ๋ณ€๊ฒฝ ์š”์•ฝ
๋นŒ๋“œ ๋ฐ ๋ฐฐ์น˜ ์„ค์ •
build.gradle.kts, BatchConfig.java, application.yml
Spring Batch ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ ๋ฐ ํ…Œ์ŠคํŠธ ์˜์กด์„ฑ ์ถ”๊ฐ€; MySQL ๋ฐฐ์น˜ ์Šคํ‚ค๋งˆ ์ดˆ๊ธฐํ™” ์„ค์ •
์‹ค์‹œ๊ฐ„ ์ด๋ฒคํŠธ ๋ฐ ๋ฐœํ–‰์ž
ProductViewedEvent.java, ViewEventPublisher.java, ProductViewLog.java, ProductViewLogRepository.java, ProductViewLogJpaRepository.java, ProductViewLogRepositoryImpl.java
์ œํ’ˆ ์กฐํšŒ ์ด๋ฒคํŠธ ์ •์˜, Kafka ๋ฐœํ–‰์ž, ์กฐํšŒ ๋กœ๊ทธ ์—”ํ‹ฐํ‹ฐ ๋ฐ ์ €์žฅ์†Œ ๊ตฌํ˜„
๋„๋ฉ”์ธ ์ด๋ฒคํŠธ ๊ตฌ์กฐ ๊ฐœ์„ 
ProductLikedEvent.java, OrderCompletedEvent.java, StockDepletedEvent.java
final ์ œ๊ฑฐ ๋ฐ protected ์ƒ์„ฑ์ž ์ถ”๊ฐ€; OrderCompletedEvent์— ์ฃผ๋ฌธ ํ•ญ๋ชฉ ์ •๋ณด ์ถ”๊ฐ€
๋ฉ”ํŠธ๋ฆญ ๋ฐ ๋žญํ‚น ๋ฐ์ดํ„ฐ ๋ชจ๋ธ
ProductMetrics.java, ProductMetricsRepository.java, ProductMetricsAggregation.java, RankingEntry.java
๋‚ ์งœ๋ณ„ ์ผ์ผ ๋ฉ”ํŠธ๋ฆญ ์ถ”์ , ์กฐํšŒ ์ˆ˜ ์นด์šดํŒ…, ๋ฐฐ์น˜ ์ง‘๊ณ„ ๋ฐ์ดํ„ฐ ๊ตฌ์กฐ
Redis ๊ธฐ๋ฐ˜ ์‹ค์‹œ๊ฐ„ ๋žญํ‚น
RankingRedisService.java
Redis ZSET์„ ์ด์šฉํ•œ ์ผ์ผ ๋žญํ‚น ์ €์žฅ์†Œ; ์กฐํšŒ, ์ข‹์•„์š”, ์ฃผ๋ฌธ๋ณ„ ์ ์ˆ˜ ์ฆ๊ฐ€ ๋ฐ ์ˆœ์œ„ ์กฐํšŒ ๊ธฐ๋Šฅ
์ฃผ๊ฐ„ ๋ฐฐ์น˜ ๋žญํ‚น
WeeklyRankingJobConfig.java, ProductRankWeekly.java, ProductRankWeeklyRepository.java
์ฃผ๊ฐ„ ์ง‘๊ณ„ ๋ฐฐ์น˜ ์ž‘์—…; ๋ฌผ๋ฆฌํ™”๋œ ๋ทฐ ํ…Œ์ด๋ธ”์— ์ €์žฅ; ์ฝ๊ธฐ/์ฒ˜๋ฆฌ/์“ฐ๊ธฐ ๋‹จ๊ณ„ ์ •์˜
์›”๊ฐ„ ๋ฐฐ์น˜ ๋žญํ‚น
MonthlyRankingJobConfig.java, ProductRankMonthly.java, ProductRankMonthlyRepository.java
์›”๊ฐ„ ์ง‘๊ณ„ ๋ฐฐ์น˜ ์ž‘์—…; ์›” ๋ฒ”์œ„ ๊ณ„์‚ฐ ๋ฐ ์ˆœ์œ„ ์ €์žฅ
Kafka ์ปจ์Šˆ๋จธ - ๊ฐœ๋ณ„ ์ด๋ฒคํŠธ ์ฒ˜๋ฆฌ
ProductLikedConsumer.java, StockDepletedConsumer.java, ViewLogConsumer.java, OrderCompletedConsumer.java
๊ฐ ๋„๋ฉ”์ธ ์ด๋ฒคํŠธ๋ฅผ ๋ฉ”ํŠธ๋ฆญ ๋ฐ Redis ๋žญํ‚น ์—…๋ฐ์ดํŠธ๋กœ ๋ณ€ํ™˜; CatalogEventConsumer ์ œ๊ฑฐ
์ œํ’ˆ ์กฐํšŒ ๋ฐ ๋žญํ‚น ํ†ตํ•ฉ
ProductFacade.java, ProductDto.java
์ œํ’ˆ ์กฐํšŒ ์‹œ ๋ทฐ ์ด๋ฒคํŠธ ๋ฐœํ–‰; RankingRedisService๋กœ ์ˆœ์œ„ ์กฐํšŒ; ProductDetailResponse์— rank ํ•„๋“œ ์ถ”๊ฐ€
๋žญํ‚น API ๊ณ„์ธต
RankingFacade.java, RankingController.java, RankingDto.java
๊ธฐ๊ฐ„๋ณ„(์ผ์ผ/์ฃผ๊ฐ„/์›”๊ฐ„) ๋žญํ‚น ์กฐํšŒ ๋กœ์ง; Redis ๋ฐ ๋ฌผ๋ฆฌํ™”๋œ ๋ทฐ ํ…Œ์ด๋ธ”์—์„œ ๋ฐ์ดํ„ฐ ๊ฒ€์ƒ‰
Outbox ๋ฐ ์ด๋ฒคํŠธ ๋ฐœํ–‰ ์„ค์ •
OutboxEventHandler.java
ProductLikedEvent ๋ฐ StockDepletedEvent์˜ ์นดํ…Œ๊ณ ๋ฆฌ๋ฅผ "catalog-events"์—์„œ ๊ฐœ๋ณ„ ์ฃผ์ œ๋กœ ๋ณ€๊ฒฝ
์ œํ’ˆ ์ €์žฅ์†Œ ํŠธ๋žœ์žญ์…˜
ProductJpaRepository.java
์ข‹์•„์š” ์นด์šดํŒ… ๋ฉ”์„œ๋“œ์— @Transactional ์ถ”๊ฐ€
๋ฐฐ์น˜ ์ž‘์—… ํ…Œ์ŠคํŠธ
WeeklyRankingJobTest.java, MonthlyRankingJobTest.java
์ฃผ๊ฐ„/์›”๊ฐ„ ๋ฐฐ์น˜ ์ž‘์—…์˜ ์ •์ƒ ์‹คํ–‰ ๋ฐ ๋žญํ‚น ๋ฐ์ดํ„ฐ ์ƒ์„ฑ ๊ฒ€์ฆ
์ปจ์Šˆ๋จธ ํ…Œ์ŠคํŠธ
ProductLikedConsumerTest.java, StockDepletedConsumerTest.java, OrderCompletedConsumerTest.java
๊ฐ ์ปจ์Šˆ๋จธ์˜ ๋ฉ”ํŠธ๋ฆญ ์—…๋ฐ์ดํŠธ, Redis ๋žญํ‚น ์ฒ˜๋ฆฌ, ๋ฉฑ๋“ฑ์„ฑ ๊ฒ€์ฆ
API ํ†ตํ•ฉ ํ…Œ์ŠคํŠธ
ProductFacadeRankTest.java, RankingFacadeTest.java, RankingApiE2ETest.java, RankingRedisServiceTest.java
๋žญํ‚น ์กฐํšŒ, Redis ๋™์ž‘, ์™„์ „ํ•œ API ํ๋ฆ„ ๊ฒ€์ฆ
์ œํ’ˆ ๋ฉ”ํŠธ๋ฆญ ํ…Œ์ŠคํŠธ
ProductMetricsTest.java
๋‚ ์งœ๋ณ„ ๋ฉ”ํŠธ๋ฆญ ์ƒ์„ฑ ๋ฐ ์กฐํšŒ ์ˆ˜ ์ฆ๊ฐ€ ๊ธฐ๋Šฅ ๊ฒ€์ฆ
๋ฌธ์„œ ๋ฐ ์„ค์ •
docs/week9/*.md, docs/week10/*.md, docker-compose.yml
๋žญํ‚น ์‹œ์Šคํ…œ ์š”๊ตฌ์‚ฌํ•ญ, ์‹œํ€€์Šค ๋‹ค์ด์–ด๊ทธ๋žจ ๋ฌธ์„œ; Kafka ํฌํŠธ ์„ค์ • ์ˆ˜์ •

Sequence Diagram(s)

sequenceDiagram
    actor User
    participant API as ProductFacade API
    participant Redis as Redis ZSET
    participant DB as Database
    participant Kafka as Kafka
    participant Consumer as Consumer

    User->>API: getProduct(productId)
    API->>Kafka: publish ProductViewedEvent
    API->>Redis: getRankingPosition(date, productId)
    Redis-->>API: rank (๋˜๋Š” null)
    API->>DB: getProductDetails
    DB-->>API: product data
    API-->>User: ProductDetailResponse with rank

    rect rgb(200, 220, 240)
    Note over Kafka,Consumer: ๋น„๋™๊ธฐ ๋ฉ”ํŠธ๋ฆญ ๋ˆ„์ 
    Kafka->>Consumer: ProductViewedEvent
    Consumer->>DB: save/update ProductViewLog
    Consumer->>DB: update ProductMetrics (viewCount++)
    Consumer->>Redis: incrementScoreForView(date, productId)
    Consumer->>Kafka: acknowledge
    end
Loading
sequenceDiagram
    participant API as RankingAPI
    participant Facade as RankingFacade
    participant Redis as Redis
    participant DB as Database<br/>(Weekly/Monthly)
    participant Repo as Repository

    API->>Facade: getRankings(period="daily", date, page, size)
    
    alt Daily Rankings
        Facade->>Redis: getTopProducts(date, offset, limit)
        Redis-->>Facade: List<RankingEntry>
        Facade->>Repo: findAllProductIds(...)
        Repo-->>Facade: List<Product>
        Facade-->>API: RankingListResponse
    else Weekly/Monthly Rankings
        Facade->>DB: queryRankingTable(periodStart, offset, limit)
        DB-->>Facade: List<ProductRankWeekly/Monthly>
        Facade->>Repo: enrichWithProductDetails
        Repo-->>Facade: List<Product>
        Facade-->>API: RankingListResponse
    end
    
    API-->>User: JSON response with ranking data
Loading
sequenceDiagram
    participant Batch as Spring Batch Job
    participant Reader as JdbcPagingItemReader
    participant Proc as ItemProcessor
    participant Writer as ItemWriter
    participant DB as Database<br/>(product_metrics)
    participant MV as MV Table<br/>(weekly/monthly)

    Batch->>Batch: deleteExistingRanks(periodStart)
    Batch->>Reader: read()
    Reader->>DB: SELECT SUM(view/like/order)<br/>GROUP BY product_id ORDER BY score
    DB-->>Reader: List<ProductMetricsAggregation>
    Reader-->>Proc: chunk of metrics
    
    loop For each aggregation
        Proc->>Proc: compute ranking<br/>assign rank counter
        Proc-->>Writer: ProductRankWeekly/Monthly
    end
    
    Writer->>MV: batch insert/replace
    MV-->>Writer: success
    
    Batch->>Batch: Job completed
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Estimated code review effort

๐ŸŽฏ 5 (Critical) | โฑ๏ธ ~120 minutes

Possibly related PRs

Suggested labels

enhancement, feature, batch-processing, redis, ranking-system, kafka-consumer, database-schema

Poem

๐Ÿฐ ํšŒ์ƒ์˜ ๋ฐœ์ž๊ตญ์„ Redis์— ๋‚จ๊ธฐ๊ณ ,
๋ฐฐ์น˜ ์ž‘์—…์ด ์ฃผ๊ฐ„ยท์›”๊ฐ„ ์ˆœ์œ„๋ฅผ ๋‹ค๋“ฌ์œผ๋ฉด,
์ œํ’ˆ ์ƒ์„ธ์— ๋ฐ˜์ง์ด๋Š” ์ˆซ์ž ํ•˜๋‚˜,
์‚ฌ์šฉ์ž์˜ ์‚ฌ๋ž‘์ด ์ˆœ์œ„๋ฅผ ์ถค์ถ”๊ฒŒ ํ•˜๋„คโ€”
์ด์ œ ๋ชจ๋“  ์กฐํšŒ์™€ ๊ตฌ๋งค๊ฐ€ ๋…ธ๋ž˜ํ•œ๋‹ค! ๐ŸŽต

Pre-merge checks and finishing touches

โŒ Failed checks (1 warning, 1 inconclusive)
Check name Status Explanation Resolution
Docstring Coverage โš ๏ธ Warning Docstring coverage is 0.55% which is insufficient. The required threshold is 80.00%. You can run @coderabbitai generate docstrings to improve docstring coverage.
Title check โ“ Inconclusive ์ œ๋ชฉ 'Feat/volume 10'์€ PR์˜ ์ฃผ์š” ๋ณ€๊ฒฝ์‚ฌํ•ญ์ธ Spring Batch ์ฃผ๊ฐ„/์›”๊ฐ„ ์ง‘๊ณ„ ์ž‘์—…, Ranking API ํ™•์žฅ, ProductMetrics ์Šคํ‚ค๋งˆ ๊ฐœ์„ ์„ ์ถฉ๋ถ„ํžˆ ๋ฐ˜์˜ํ•˜์ง€ ๋ชปํ•ฉ๋‹ˆ๋‹ค. ๋” ๊ตฌ์ฒด์ ์ธ ์ œ๋ชฉ์œผ๋กœ ๋ณ€๊ฒฝ์„ ๊ถŒ์žฅํ•ฉ๋‹ˆ๋‹ค. ์˜ˆ: 'Feat: Spring Batch weekly/monthly ranking aggregation and ranking API extension' ๋˜๋Š” ํ•œ๊ธ€๋กœ 'Feat: ์ฃผ๊ฐ„/์›”๊ฐ„ ๋žญํ‚น ์ง‘๊ณ„ ๋ฐ Ranking API ํ™•์žฅ'
โœ… Passed checks (1 passed)
Check name Status Explanation
Description check โœ… Passed PR ์„ค๋ช…์ด ์š”๊ตฌ๋˜๋Š” ํ…œํ”Œ๋ฆฟ ๊ตฌ์กฐ๋ฅผ ๋Œ€๋ถ€๋ถ„ ๋”ฐ๋ฅด๊ณ  ์žˆ์œผ๋ฉฐ, Summary, Review Points, Checklist๊ฐ€ ๋ชจ๋‘ ํฌํ•จ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.

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Actionable comments posted: 18

๐Ÿงน Nitpick comments (27)
apps/commerce-api/src/main/java/com/loopers/domain/product/event/ProductViewedEvent.java (1)

13-15: productId null ๊ฒ€์ฆ์„ ์ถ”๊ฐ€ํ•˜๋Š” ๊ฒƒ์„ ๊ณ ๋ คํ•˜์„ธ์š”.

๋„๋ฉ”์ธ ์ด๋ฒคํŠธ๋Š” ํ•„์ˆ˜ ํ•„๋“œ๋ฅผ ๊ฒ€์ฆํ•˜์—ฌ ์ž˜๋ชป๋œ ์ด๋ฒคํŠธ๊ฐ€ Kafka๋กœ ์ „ํŒŒ๋˜๋Š” ๊ฒƒ์„ ๋ฐฉ์ง€ํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.

๐Ÿ”Ž null ๊ฒ€์ฆ ์ถ”๊ฐ€ ์ œ์•ˆ
 private ProductViewedEvent(Long productId) {
+    if (productId == null) {
+        throw new IllegalArgumentException("productId cannot be null");
+    }
     this.productId = productId;
     this.occurredAt = LocalDateTime.now();
 }
apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductJpaRepository.java (1)

30-33: Repository ๋ฉ”์„œ๋“œ์˜ @transactional์€ ํ˜ธ์ถœ ์ปจํ…์ŠคํŠธ์— ๋”ฐ๋ผ ํ•„์š”์„ฑ์ด ๋‹ค๋ฆ…๋‹ˆ๋‹ค.

ํ˜„์žฌ ๊ตฌํ˜„์„ ๋ถ„์„ํ•˜๋ฉด:

  • incrementLikeCount()/decrementLikeCount(): ProductLikeEventHandler์—์„œ ํ˜ธ์ถœ๋˜๋Š”๋ฐ, ์ด ํ•ธ๋“ค๋Ÿฌ ์ž์ฒด๊ฐ€ @transactional์ด ์•„๋‹ˆ๋ฏ€๋กœ Repository ๋ฉ”์„œ๋“œ์˜ @transactional์ด ํ•„์ˆ˜์ž…๋‹ˆ๋‹ค.
  • updateProductTotalLikes(): ProductLikesConsistencyBatch.validateAndFixProductLikesConsistency()์—์„œ ํ˜ธ์ถœ๋˜๋Š”๋ฐ, ์ด ๋ฉ”์„œ๋“œ๊ฐ€ ์ด๋ฏธ @transactional์ด๋ฏ€๋กœ Repository ๋ฉ”์„œ๋“œ์˜ @transactional์€ ์ค‘๋ณต์ž…๋‹ˆ๋‹ค.

๊ถŒ์žฅ ๊ฐœ์„ :
ProductLikeEventHandler์˜ like ์ด๋ฒคํŠธ ์ฒ˜๋ฆฌ๋ฅผ ๋ณ„๋„ Service ๋ ˆ์ด์–ด๋กœ ๋ž˜ํ•‘ํ•˜์—ฌ ํŠธ๋žœ์žญ์…˜ ๊ฒฝ๊ณ„๋ฅผ ๋ช…ํ™•ํžˆ ํ•˜๋ฉด, Repository ๋ฉ”์„œ๋“œ์—์„œ @transactional์„ ์ œ๊ฑฐํ•˜๊ณ  Service์—์„œ๋งŒ ๊ด€๋ฆฌํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์˜ˆ:
@Service
@Transactional
public class ProductLikeService {
    public void handleLikeEvent(Long productId, boolean liked) {
        if (liked) {
            productRepository.incrementLikeCount(productId);
        } else {
            productRepository.decrementLikeCount(productId);
        }
    }
}

์ด๋ ‡๊ฒŒ ํ•˜๋ฉด ๋‹จ์ผ ์ฑ…์ž„ ์›์น™์„ ์ง€ํ‚ค๋ฉด์„œ ํŠธ๋žœ์žญ์…˜์„ ๋ช…ํ™•ํ•˜๊ฒŒ ๊ด€๋ฆฌํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

Also applies to: 35-38, 49-52

apps/commerce-api/src/test/java/com/loopers/infrastructure/batch/MonthlyRankingJobTest.java (2)

53-95: ์›”๊ฐ„ ๋žญํ‚น ์ง‘๊ณ„ ๋กœ์ง์ด ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ๊ฒ€์ฆ๋ฉ๋‹ˆ๋‹ค.

ํ…Œ์ŠคํŠธ๊ฐ€ ๋‹ค์Œ์„ ๋ช…ํ™•ํ•˜๊ฒŒ ๊ฒ€์ฆํ•ฉ๋‹ˆ๋‹ค:

  • Job ์‹คํ–‰ ์™„๋ฃŒ ์ƒํƒœ
  • ์ง‘๊ณ„๋œ ๋žญํ‚น ๊ฐœ์ˆ˜ (2๊ฐœ)
  • ์ ์ˆ˜ ๊ณ„์‚ฐ ๊ณต์‹ (viewCount + likeCountร—2 + orderCountร—6)
  • ๋žญํ‚น ์ˆœ์„œ (์ ์ˆ˜ ๊ธฐ์ค€ ๋‚ด๋ฆผ์ฐจ์ˆœ)

์ฃผ์„์œผ๋กœ ์˜ˆ์ƒ ์ ์ˆ˜๋ฅผ ๋ช…์‹œํ•˜์—ฌ ๊ฐ€๋…์„ฑ์ด ๋†’์Šต๋‹ˆ๋‹ค.

ํ–ฅํ›„ ๋‹ค์Œ๊ณผ ๊ฐ™์€ ์—ฃ์ง€ ์ผ€์ด์Šค ํ…Œ์ŠคํŠธ๋ฅผ ์ถ”๊ฐ€ํ•˜๋ฉด ๋”์šฑ ๊ฒฌ๊ณ ํ•ด์ง‘๋‹ˆ๋‹ค:

  • ๋ฉ”ํŠธ๋ฆญ ๋ฐ์ดํ„ฐ๊ฐ€ ์—†์„ ๋•Œ
  • ๋™์  ์ƒํ’ˆ์ด ์žˆ์„ ๋•Œ
  • 100๊ฐœ ์ด์ƒ์˜ ์ƒํ’ˆ์ด ์žˆ์„ ๋•Œ (TOP 100 ์ œํ•œ ๊ฒ€์ฆ)

97-106: ํ…Œ์ŠคํŠธ ๋ฐ์ดํ„ฐ ์ƒ์„ฑ ๋ฐฉ์‹ ๊ฐœ์„ ์„ ๊ณ ๋ คํ•˜์„ธ์š”.

ReflectionTestUtils๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ private ํ•„๋“œ๋ฅผ ์„ค์ •ํ•˜๋Š” ๊ฒƒ์€ ๋™์ž‘ํ•˜์ง€๋งŒ, ์บก์Аํ™”๋ฅผ ์šฐํšŒํ•ฉ๋‹ˆ๋‹ค.

๐Ÿ”Ž ProductMetrics์— ํ…Œ์ŠคํŠธ์šฉ ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ ์ถ”๊ฐ€ ์ œ์•ˆ

ProductMetrics ํด๋ž˜์Šค์— ๋‹ค์Œ๊ณผ ๊ฐ™์€ ํ…Œ์ŠคํŠธ์šฉ ์ •์  ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ๋ฅผ ์ถ”๊ฐ€ํ•˜๋Š” ๊ฒƒ์„ ๊ณ ๋ คํ•˜์„ธ์š”:

// ProductMetrics.java์— ์ถ”๊ฐ€
public static ProductMetrics createForTest(
    Long productId, 
    LocalDate date,
    Long viewCount, 
    Long likeCount,
    Long orderCount, 
    Long totalQuantity
) {
    ProductMetrics metrics = create(productId, date);
    metrics.viewCount = viewCount;
    metrics.likeCount = likeCount;
    metrics.orderCount = orderCount;
    metrics.totalQuantity = totalQuantity;
    return metrics;
}

๋˜๋Š” package-private setter ๋ฉ”์„œ๋“œ๋ฅผ ์ถ”๊ฐ€ํ•˜์—ฌ ํ…Œ์ŠคํŠธ์—์„œ๋งŒ ์ ‘๊ทผ ๊ฐ€๋Šฅํ•˜๋„๋ก ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

ํ…Œ์ŠคํŠธ ์ฝ”๋“œ์—์„œ๋Š”:

private ProductMetrics createMetrics(Long productId, LocalDate date,
                                      Long viewCount, Long likeCount,
                                      Long orderCount, Long totalQuantity) {
    return ProductMetrics.createForTest(productId, date, viewCount, likeCount, orderCount, totalQuantity);
}
apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/ProductMetricsRepository.java (1)

15-15: ๋‚ ์งœ ๋ฒ”์œ„ ์กฐํšŒ ๋ฉ”์„œ๋“œ๊ฐ€ ์ ์ ˆํ•˜์ง€๋งŒ ์ฃผ์˜๊ฐ€ ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.

findByDateBetween์€ ์ฃผ๊ฐ„/์›”๊ฐ„ ๋ฐฐ์น˜ ์ง‘๊ณ„์— ํ•„์š”ํ•œ ๋ฉ”์„œ๋“œ์ž…๋‹ˆ๋‹ค. Spring Data์˜ Between์€ ์–‘์ชฝ ๊ฒฝ๊ณ„๋ฅผ ํฌํ•จ(inclusive)ํ•ฉ๋‹ˆ๋‹ค.

ํ˜„์žฌ ๊ตฌํ˜„์—์„œ ๊ณ ๋ คํ•  ์‚ฌํ•ญ:

  1. ๋Œ€๋Ÿ‰ ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ: ๊ธด ๊ธฐ๊ฐ„ ์กฐํšŒ ์‹œ ๋งŽ์€ ๋ ˆ์ฝ”๋“œ๊ฐ€ ๋ฐ˜ํ™˜๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์›”๊ฐ„ ์ง‘๊ณ„(์ตœ๋Œ€ 31์ผ์น˜ ๋ฐ์ดํ„ฐ)๋Š” ๋ฌธ์ œ์—†์ง€๋งŒ, ํ–ฅํ›„ ๋” ๊ธด ๊ธฐ๊ฐ„ ์กฐํšŒ๊ฐ€ ํ•„์š”ํ•˜๋‹ค๋ฉด ํŽ˜์ด์ง• ๋˜๋Š” ์ŠคํŠธ๋ฆฌ๋ฐ ๋ฐฉ์‹์„ ๊ณ ๋ คํ•˜์„ธ์š”:
// ๋Œ€์•ˆ 1: ํŽ˜์ด์ง•
Page<ProductMetrics> findByDateBetween(LocalDate startDate, LocalDate endDate, Pageable pageable);

// ๋Œ€์•ˆ 2: ์ŠคํŠธ๋ฆฌ๋ฐ (๋ฐฐ์น˜ ์ฒ˜๋ฆฌ์— ์ ํ•ฉ)
@Query("SELECT pm FROM ProductMetrics pm WHERE pm.date BETWEEN :startDate AND :endDate")
Stream<ProductMetrics> streamByDateBetween(@Param("startDate") LocalDate startDate, 
                                            @Param("endDate") LocalDate endDate);
  1. ์ธ๋ฑ์Šค ํ™•์ธ: date ์ปฌ๋Ÿผ์— ์ธ๋ฑ์Šค๊ฐ€ ์žˆ๋Š”์ง€ ํ™•์ธํ•˜์—ฌ ๋ฒ”์œ„ ๊ฒ€์ƒ‰ ์„ฑ๋Šฅ์„ ์ตœ์ ํ™”ํ•˜์„ธ์š”.
apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankMonthlyRepository.java (1)

16-19: ํŠธ๋žœ์žญ์…˜์€ ํ˜ธ์ถœ์ž(caller)์—์„œ ๊ด€๋ฆฌํ•˜๋Š” ๊ฒƒ์ด ๊ถŒ์žฅ๋ฉ๋‹ˆ๋‹ค.

Repository ๋ฉ”์„œ๋“œ์— @Transactional์„ ์ง์ ‘ ๋ถ™์ด๋Š” ๊ฒƒ๋ณด๋‹ค, ์ด ๋ฉ”์„œ๋“œ๋ฅผ ํ˜ธ์ถœํ•˜๋Š” Service ๋˜๋Š” Listener ๋ ˆ๋ฒจ์—์„œ ํŠธ๋žœ์žญ์…˜์„ ๊ด€๋ฆฌํ•˜๋Š” ๊ฒƒ์ด Spring์˜ ์ผ๋ฐ˜์ ์ธ ํŒจํ„ด์ž…๋‹ˆ๋‹ค.

PR ์งˆ๋ฌธ #3์— ๋Œ€ํ•œ ๋‹ต๋ณ€:

  • StepExecutionListener.beforeStep()์ด ํŠธ๋žœ์žญ์…˜ ์™ธ๋ถ€์—์„œ ์‹คํ–‰๋œ๋‹ค๋ฉด, Listener ๋ฉ”์„œ๋“œ์— @Transactional์„ ์ถ”๊ฐ€ํ•˜๊ฑฐ๋‚˜
  • ๋ณ„๋„์˜ Service ํด๋ž˜์Šค๋ฅผ ๋งŒ๋“ค์–ด @Transactional ๋ฉ”์„œ๋“œ๋กœ delete ๋กœ์ง์„ ๊ฐ์‹ธ๋Š” ๊ฒƒ์ด ๋” ๋ช…ํ™•ํ•œ ์ฑ…์ž„ ๋ถ„๋ฆฌ์ž…๋‹ˆ๋‹ค.

Repository๋Š” ๋ฐ์ดํ„ฐ ์ ‘๊ทผ ๊ณ„์ธต์˜ ์ธํ„ฐํŽ˜์ด์Šค๋กœ, ํŠธ๋žœ์žญ์…˜ ๊ฒฝ๊ณ„๋Š” ๋น„์ฆˆ๋‹ˆ์Šค ๋กœ์ง์„ ๋‹ด๋‹นํ•˜๋Š” ์ƒ์œ„ ๋ ˆ์ด์–ด์—์„œ ์ •์˜ํ•˜๋Š” ๊ฒƒ์ด ์ผ๋ฐ˜์ ์ž…๋‹ˆ๋‹ค.

๐Ÿ”Ž ๊ถŒ์žฅ ๋ฆฌํŒฉํ† ๋ง: Listener์—์„œ ํŠธ๋žœ์žญ์…˜ ๊ด€๋ฆฌ

Listener ํด๋ž˜์Šค์˜ beforeStep ๋ฉ”์„œ๋“œ์— @Transactional์„ ์ถ”๊ฐ€ํ•˜๊ณ , Repository์—์„œ๋Š” ์ œ๊ฑฐ:

 public interface ProductRankMonthlyRepository extends JpaRepository<ProductRankMonthly, Long> {
 
     List<ProductRankMonthly> findByPeriodStartOrderByRankingAsc(LocalDate periodStart);
 
     @Modifying
-    @Transactional
     @Query("DELETE FROM ProductRankMonthly p WHERE p.periodStart = :periodStart")
     void deleteByPeriodStart(@Param("periodStart") LocalDate periodStart);
 }

๊ทธ๋ฆฌ๊ณ  ํ˜ธ์ถœํ•˜๋Š” Listener์—์„œ:

@Transactional
@Override
public void beforeStep(StepExecution stepExecution) {
    productRankMonthlyRepository.deleteByPeriodStart(periodStart);
}
apps/commerce-api/src/test/java/com/loopers/infrastructure/batch/WeeklyRankingJobTest.java (1)

102-111: ๋ฆฌํ”Œ๋ ‰์…˜ ์‚ฌ์šฉ์„ ๊ณ ๋ คํ•ด๋ณด์‹œ๊ธฐ ๋ฐ”๋ž๋‹ˆ๋‹ค.

ReflectionTestUtils๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ private ํ•„๋“œ๋ฅผ ์„ค์ •ํ•˜๋Š” ๊ฒƒ์€ ํ…Œ์ŠคํŠธ์—์„œ ํ”ํžˆ ์‚ฌ์šฉ๋˜๋Š” ํŒจํ„ด์ด์ง€๋งŒ, ๊ฐ€๋Šฅํ•˜๋‹ค๋ฉด ๋„๋ฉ”์ธ ๊ฐ์ฒด์— ํ…Œ์ŠคํŠธ์šฉ ๋นŒ๋” ๋ฉ”์„œ๋“œ๋‚˜ ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ๋ฅผ ์ถ”๊ฐ€ํ•˜๋Š” ๊ฒƒ์ด ๋” ์•ˆ์ „ํ•˜๊ณ  ์œ ์ง€๋ณด์ˆ˜ํ•˜๊ธฐ ์‰ฝ์Šต๋‹ˆ๋‹ค.

์˜ˆ๋ฅผ ๋“ค์–ด, ProductMetrics์— ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๋ฉ”์„œ๋“œ๋ฅผ ์ถ”๊ฐ€ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค:

// ProductMetrics.java
public ProductMetrics withMetrics(Long viewCount, Long likeCount, Long orderCount, Long totalQuantity) {
    this.viewCount = viewCount;
    this.likeCount = likeCount;
    this.orderCount = orderCount;
    this.totalQuantity = totalQuantity;
    return this;
}

๋‹ค๋งŒ, ํ˜„์žฌ ๊ตฌํ˜„๋„ ํ…Œ์ŠคํŠธ ๋ชฉ์ ์œผ๋กœ๋Š” ์ ์ ˆํ•˜๋ฉฐ, ๋„๋ฉ”์ธ ์ˆœ์ˆ˜์„ฑ์„ ์œ ์ง€ํ•˜๋ ค๋Š” ์˜๋„๋ผ๋ฉด ํ˜„์žฌ ๋ฐฉ์‹๋„ ์ˆ˜์šฉ ๊ฐ€๋Šฅํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/interfaces/api/ranking/RankingApiE2ETest.java (1)

70-73: ํ…Œ์ŠคํŠธ ๋ฐ์ดํ„ฐ ์„ค์ • ์‹œ ์„œ๋น„์Šค ๋ ˆ์ด์–ด๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ์„ ๊ณ ๋ คํ•ด๋ณด์„ธ์š”.

ํ˜„์žฌ RedisTemplate์„ ์ง์ ‘ ์‚ฌ์šฉํ•˜์—ฌ ํ…Œ์ŠคํŠธ ๋ฐ์ดํ„ฐ๋ฅผ ์„ค์ •ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ด๋Š” ์ž‘๋™ํ•˜์ง€๋งŒ, RankingRedisService์˜ ๋ฉ”์„œ๋“œ(์˜ˆ: incrementScoreForView)๋ฅผ ์‚ฌ์šฉํ•˜๋ฉด ๋‹ค์Œ๊ณผ ๊ฐ™์€ ์žฅ์ ์ด ์žˆ์Šต๋‹ˆ๋‹ค:

  1. ์‹ค์ œ ์‚ฌ์šฉ ํ๋ฆ„ ๋ฐ˜์˜: ํ”„๋กœ๋•์…˜ ์ฝ”๋“œ๊ฐ€ ์‚ฌ์šฉํ•˜๋Š” ๋ฐฉ์‹๊ณผ ๋™์ผํ•˜๊ฒŒ ๋ฐ์ดํ„ฐ๋ฅผ ์„ค์ •
  2. ์„œ๋น„์Šค ๋กœ์ง ๊ฒ€์ฆ: TTL ์„ค์ • ๋“ฑ ์„œ๋น„์Šค ๋ ˆ๋ฒจ์˜ ๋ถ€๊ฐ€ ๋กœ์ง๊นŒ์ง€ ํ•จ๊ป˜ ํ…Œ์ŠคํŠธ
  3. ์œ ์ง€๋ณด์ˆ˜์„ฑ: Redis ํ‚ค ํ˜•์‹์ด๋‚˜ ์ €์žฅ ๋ฐฉ์‹์ด ๋ณ€๊ฒฝ๋˜์–ด๋„ ์„œ๋น„์Šค๋งŒ ์ˆ˜์ •ํ•˜๋ฉด ๋จ

๋‹ค๋งŒ, ํ˜„์žฌ ๋ฐฉ์‹๋„ E2E ํ…Œ์ŠคํŠธ์˜ ๋ชฉ์ (API ์—”๋“œํฌ์ธํŠธ ๊ฒ€์ฆ)์—๋Š” ์ถฉ๋ถ„ํ•˜๋ฏ€๋กœ, ์„ ํƒ์ ์œผ๋กœ ๊ฐœ์„  ๊ฐ€๋Šฅํ•ฉ๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ œ์•ˆ: RankingRedisService ์‚ฌ์šฉ
-        String today = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd"));
-        String key = "ranking:all:" + today;
-
-        // Redis ZSET์— ์ ์ˆ˜ ์ €์žฅ
-        redisTemplate.opsForZSet().add(key, productA.getId().toString(), 3.0);
-        redisTemplate.opsForZSet().add(key, productB.getId().toString(), 5.0);
-        redisTemplate.opsForZSet().add(key, productC.getId().toString(), 1.0);
+        LocalDate today = LocalDate.now();
+        
+        // RankingRedisService๋ฅผ ํ†ตํ•œ ์ ์ˆ˜ ์„ค์ •
+        // ์ƒํ’ˆA: 3์  (์˜ˆ: ์กฐํšŒ 3๋ฒˆ)
+        for (int i = 0; i < 3; i++) {
+            rankingRedisService.incrementScoreForView(today, productA.getId());
+        }
+        // ์ƒํ’ˆB: 5์  (์˜ˆ: ์กฐํšŒ 5๋ฒˆ)
+        for (int i = 0; i < 5; i++) {
+            rankingRedisService.incrementScoreForView(today, productB.getId());
+        }
+        // ์ƒํ’ˆC: 1์ 
+        rankingRedisService.incrementScoreForView(today, productC.getId());
apps/commerce-api/src/test/java/com/loopers/infrastructure/ranking/RankingRedisServiceTest.java (1)

102-112: TTL ํ—ˆ์šฉ ์˜ค์ฐจ ๊ฒ€์ฆ์„ ๊ฐ•ํ™”ํ•˜์„ธ์š”.

TTL ์„ค์ • ์งํ›„์—๋Š” 172800์ดˆ์— ๋งค์šฐ ๊ทผ์ ‘ํ•ด์•ผ ํ•˜๋Š”๋ฐ, ํ˜„์žฌ 60์ดˆ ํ—ˆ์šฉ ์˜ค์ฐจ๋Š” ๊ณผ๋„ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์‹คํ–‰ ์‹œ๊ฐ„์„ ๊ณ ๋ คํ•˜๋”๋ผ๋„ 5-10์ดˆ ์ •๋„๋ฉด ์ถฉ๋ถ„ํ•ฉ๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ œ์•ˆํ•˜๋Š” ์ˆ˜์ •์•ˆ
-        assertThat(ttl).isGreaterThan(172800 - 60);  // ์ตœ์†Œ 2์ผ - 1๋ถ„
+        assertThat(ttl).isGreaterThan(172800 - 10);  // ์ตœ์†Œ 2์ผ - 10์ดˆ
         assertThat(ttl).isLessThanOrEqualTo(172800); // ์ตœ๋Œ€ 2์ผ
apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/OrderCompletedConsumer.java (1)

55-63: ๋Œ€๋Ÿ‰ ์ฃผ๋ฌธ ์‹œ N+1 ์ €์žฅ ํŒจํ„ด ๊ณ ๋ ค

ํ˜„์žฌ ๊ตฌํ˜„์€ ์ฃผ๋ฌธ ์•„์ดํ…œ๋ณ„๋กœ ๊ฐœ๋ณ„ save()๋ฅผ ํ˜ธ์ถœํ•ฉ๋‹ˆ๋‹ค. ๋Œ€๋ถ€๋ถ„์˜ ์ฃผ๋ฌธ์ด ์†Œ์ˆ˜์˜ ์•„์ดํ…œ์„ ํฌํ•จํ•œ๋‹ค๋ฉด ๋ฌธ์ œ์—†์ง€๋งŒ, ๋Œ€๋Ÿ‰ ์•„์ดํ…œ ์ฃผ๋ฌธ ์‹œ DB ์™•๋ณต์ด ์ฆ๊ฐ€ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

ํ˜„์žฌ ๊ตฌํ˜„๋„ ๊ธฐ๋Šฅ์ ์œผ๋กœ ์ •ํ™•ํ•˜๋ฉฐ, ํŠธ๋žœ์žญ์…˜ ๋‚ด์—์„œ ์ฒ˜๋ฆฌ๋˜๋ฏ€๋กœ ๋‹น์žฅ์€ ๋ฌธ์ œ์—†์Šต๋‹ˆ๋‹ค. ํ–ฅํ›„ ์„ฑ๋Šฅ ์ด์Šˆ ๋ฐœ์ƒ ์‹œ ๋ฐฐ์น˜ ์ €์žฅ์„ ๊ณ ๋ คํ•ด ์ฃผ์„ธ์š”.

apps/commerce-api/src/test/java/com/loopers/application/ranking/RankingFacadeTest.java (1)

23-130: Weekly/Monthly ๋žญํ‚น ํ…Œ์ŠคํŠธ ์ถ”๊ฐ€ ๊ณ ๋ ค

ํ˜„์žฌ ํ…Œ์ŠคํŠธ๋Š” daily ๊ธฐ๊ฐ„๋งŒ ๊ฒ€์ฆํ•ฉ๋‹ˆ๋‹ค. PR์—์„œ weekly, monthly ๊ธฐ๊ฐ„๋„ ์ง€์›ํ•˜๋ฏ€๋กœ, MV ๊ธฐ๋ฐ˜ ๋žญํ‚น ์กฐํšŒ ํ…Œ์ŠคํŠธ๋ฅผ ์ถ”๊ฐ€ํ•˜๋ฉด ์ปค๋ฒ„๋ฆฌ์ง€๊ฐ€ ํ–ฅ์ƒ๋ฉ๋‹ˆ๋‹ค. ๋ณ„๋„ ํ…Œ์ŠคํŠธ ํด๋ž˜์Šค๋‚˜ ์ด ํŒŒ์ผ์— ์ถ”๊ฐ€ ํ…Œ์ŠคํŠธ ๋ฉ”์„œ๋“œ๋กœ ๊ตฌํ˜„ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/application/product/ProductFacadeRankTest.java (2)

23-23: ํ†ตํ•ฉ ํ…Œ์ŠคํŠธ์˜ ์‹คํ–‰ ๋น„์šฉ์„ ๊ณ ๋ คํ•˜์„ธ์š”.

@SpringBootTest๋Š” ์ „์ฒด ์• ํ”Œ๋ฆฌ์ผ€์ด์…˜ ์ปจํ…์ŠคํŠธ๋ฅผ ๋กœ๋“œํ•˜๋ฏ€๋กœ ์‹คํ–‰ ์‹œ๊ฐ„์ด ์˜ค๋ž˜ ๊ฑธ๋ฆฝ๋‹ˆ๋‹ค. ํ˜„์žฌ ํ…Œ์ŠคํŠธ๋Š” ProductFacade, RankingRedisService, Redis ํ†ตํ•ฉ์„ ๊ฒ€์ฆํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ๊ฐ€๋Šฅํ•˜๋‹ค๋ฉด ๋‹ค์Œ์„ ๊ณ ๋ คํ•ด๋ณด์„ธ์š”:

  • ํ•ต์‹ฌ ๋žญํ‚น ๋กœ์ง์€ ๋‹จ์œ„ ํ…Œ์ŠคํŠธ๋กœ ๊ฒ€์ฆ
  • Redis ํ†ตํ•ฉ๋งŒ ํ•„์š”ํ•œ ๊ฒฝ์šฐ @DataRedisTest ๊ฐ™์€ ์Šฌ๋ผ์ด์Šค ํ…Œ์ŠคํŠธ ํ™œ์šฉ
  • ํ†ตํ•ฉ ํ…Œ์ŠคํŠธ๋Š” ์ค‘์š”ํ•œ ์—”๋“œํˆฌ์—”๋“œ ์‹œ๋‚˜๋ฆฌ์˜ค๋กœ ์ œํ•œ

44-45: ์ •์  ํ•„๋“œ์˜ LocalDate.now() ์‚ฌ์šฉ ์‹œ ์ž์ • ๊ฒฝ๊ณ„ ๋ฌธ์ œ ๊ฐ€๋Šฅ์„ฑ

TODAY์™€ TODAY_KEY๊ฐ€ LocalDate.now()๋กœ ์ดˆ๊ธฐํ™”๋˜๋ฏ€๋กœ, ํ…Œ์ŠคํŠธ๊ฐ€ ์ž์ •์„ ๊ฑธ์ณ ์‹คํ–‰๋˜๋ฉด setUp()๊ณผ ํ…Œ์ŠคํŠธ ๋ฉ”์„œ๋“œ ๋‚ด์—์„œ ์„œ๋กœ ๋‹ค๋ฅธ ๋‚ ์งœ๋ฅผ ์ฐธ์กฐํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ œ์•ˆํ•˜๋Š” ์ˆ˜์ •์•ˆ
-    private static final LocalDate TODAY = LocalDate.now();
-    private static final String TODAY_KEY = "ranking:all:" + TODAY.format(DateTimeFormatter.ofPattern("yyyyMMdd"));
+    private LocalDate today;
+    private String todayKey;

     @BeforeEach
     void setUp() {
+        today = LocalDate.now();
+        todayKey = "ranking:all:" + today.format(DateTimeFormatter.ofPattern("yyyyMMdd"));
-        redisTemplate.delete(TODAY_KEY);
+        redisTemplate.delete(todayKey);
apps/commerce-api/src/main/java/com/loopers/domain/product/ProductViewLog.java (1)

37-39: productId null ๊ฒ€์ฆ ์ถ”๊ฐ€๋ฅผ ๊ณ ๋ คํ•˜์„ธ์š”.

create() ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ๊ฐ€ productId์— ๋Œ€ํ•œ null ๊ฒ€์ฆ์„ ํ•˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค. ํ˜ธ์ถœ์ž๊ฐ€ ์‹ค์ˆ˜๋กœ null์„ ์ „๋‹ฌํ•˜๋ฉด ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์ œ์•ฝ ์กฐ๊ฑด ์œ„๋ฐ˜์ด ๋ฐœ์ƒํ•  ๋•Œ๊นŒ์ง€ ๊ฐ์ง€๋˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ œ์•ˆํ•˜๋Š” ์ˆ˜์ •์•ˆ
 public static ProductViewLog create(Long productId) {
+    if (productId == null) {
+        throw new IllegalArgumentException("productId๋Š” null์ผ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค");
+    }
     return new ProductViewLog(productId);
 }
apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/OrderCompletedConsumerTest.java (1)

57-57: ReflectionTestUtils ์‚ฌ์šฉ ๋Œ€์‹  ํ…Œ์ŠคํŠธ ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ๋ฅผ ๊ณ ๋ คํ•˜์„ธ์š”.

ReflectionTestUtils.setField(order, "id", 100L)๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ID๋ฅผ ์„ค์ •ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ด๋Š” ํ…Œ์ŠคํŠธ ๊ฐ€๋…์„ฑ์„ ๋–จ์–ด๋œจ๋ฆฌ๊ณ  ๋ฆฌํŒฉํ† ๋ง ์‹œ ๊นจ์ง€๊ธฐ ์‰ฝ์Šต๋‹ˆ๋‹ค. Order ์—”ํ‹ฐํ‹ฐ์— ํ…Œ์ŠคํŠธ์šฉ ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ๋‚˜ ๋นŒ๋” ํŒจํ„ด์„ ์ถ”๊ฐ€ํ•˜๋Š” ๊ฒƒ์„ ๊ถŒ์žฅํ•ฉ๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ œ์•ˆํ•˜๋Š” ๊ฐœ์„ ์•ˆ

Order ์—”ํ‹ฐํ‹ฐ์— ํ…Œ์ŠคํŠธ์šฉ ํŒฉํ† ๋ฆฌ ์ถ”๊ฐ€:

// Order.java์— ์ถ”๊ฐ€
public static Order createForTest(Long id, String userId, List<OrderItem> items, long totalAmount) {
    Order order = create(userId, items, totalAmount);
    // ํ…Œ์ŠคํŠธ์šฉ ID ์„ค์ • ๋กœ์ง
    return order;
}

ํ…Œ์ŠคํŠธ ์ฝ”๋“œ ๊ฐœ์„ :

-Order order = Order.create("user1", List.of(item1, item2), 80000);
-ReflectionTestUtils.setField(order, "id", 100L);
+Order order = Order.createForTest(100L, "user1", List.of(item1, item2), 80000);

Also applies to: 81-81

apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankMonthly.java (2)

14-17: ๋ณตํ•ฉ ์œ ๋‹ˆํฌ ์ œ์•ฝ์กฐ๊ฑด ์ถ”๊ฐ€ ๊ณ ๋ ค

periodStart์™€ productId ์กฐํ•ฉ์— ๋Œ€ํ•œ ์œ ๋‹ˆํฌ ์ œ์•ฝ์กฐ๊ฑด์ด ์—†์Šต๋‹ˆ๋‹ค. ๋ฐฐ์น˜ ์ž‘์—…์—์„œ DELETE+INSERT ์ „๋žต์„ ์‚ฌ์šฉํ•˜๋”๋ผ๋„, ์˜ˆ์™ธ ์ƒํ™ฉ(์ค‘๋ณต ์‹คํ–‰, ๋ถ€๋ถ„ ์‹คํŒจ ๋“ฑ)์—์„œ ๋™์ผ ๊ธฐ๊ฐ„์— ๋™์ผ ์ƒํ’ˆ์ด ์ค‘๋ณต ์‚ฝ์ž…๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๐Ÿ”Ž ์œ ๋‹ˆํฌ ์ œ์•ฝ์กฐ๊ฑด ์ถ”๊ฐ€ ์˜ˆ์‹œ
 @Entity
 @Table(name = "mv_product_rank_monthly", indexes = {
-        @Index(name = "idx_monthly_period_rank", columnList = "periodStart, ranking")
-})
+        @Index(name = "idx_monthly_period_rank", columnList = "periodStart, ranking")
+}, uniqueConstraints = {
+        @UniqueConstraint(name = "uk_monthly_product_period", columnNames = {"productId", "periodStart"})
+})
 public class ProductRankMonthly {

62-62: ํ…Œ์ŠคํŠธ ์šฉ์ด์„ฑ์„ ์œ„ํ•ด Clock ์ฃผ์ž… ๊ณ ๋ ค

LocalDateTime.now()๋ฅผ ์ง์ ‘ ํ˜ธ์ถœํ•˜๋ฉด ํ…Œ์ŠคํŠธ์—์„œ ์‹œ๊ฐ„์„ ์ œ์–ดํ•˜๊ธฐ ์–ด๋ ต์Šต๋‹ˆ๋‹ค. ํ˜„์žฌ ๋ฐฐ์น˜ ์ž‘์—…์—์„œ ์ƒ์„ฑ๋˜๋ฏ€๋กœ ํฐ ๋ฌธ์ œ๋Š” ์•„๋‹ˆ์ง€๋งŒ, ํ•„์š”์‹œ Clock์„ ํŒŒ๋ผ๋ฏธํ„ฐ๋กœ ๋ฐ›๋Š” ๋ฐฉ์‹์„ ๊ณ ๋ คํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeeklyRepository.java (1)

14-14: ๊ฒฐ๊ณผ ํฌ๊ธฐ ์ œํ•œ ๊ณ ๋ ค

findByPeriodStartOrderByRankingAsc๋Š” ์ œํ•œ ์—†์ด ๋ชจ๋“  ๋žญํ‚น์„ ๋ฐ˜ํ™˜ํ•ฉ๋‹ˆ๋‹ค. TOP 100๋งŒ ์‚ฌ์šฉํ•œ๋‹ค๋ฉด Pageable์„ ์ถ”๊ฐ€ํ•˜๊ฑฐ๋‚˜ ๋ฉ”์„œ๋“œ๋ช…์— Top100์„ ํฌํ•จํ•˜๋Š” ๊ฒƒ์ด ์˜๋„๋ฅผ ๋ช…ํ™•ํžˆ ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ œ์•ˆ ์˜ˆ์‹œ
List<ProductRankWeekly> findTop100ByPeriodStartOrderByRankingAsc(LocalDate periodStart);

๋˜๋Š”

List<ProductRankWeekly> findByPeriodStartOrderByRankingAsc(LocalDate periodStart, Pageable pageable);
apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/StockDepletedConsumerTest.java (1)

39-64: ํ…Œ์ŠคํŠธ ์ปค๋ฒ„๋ฆฌ์ง€ LGTM, ์˜ˆ์™ธ ์ผ€์ด์Šค ํ…Œ์ŠคํŠธ ์ถ”๊ฐ€ ๊ณ ๋ ค

์ •์ƒ ์ฒ˜๋ฆฌ์™€ ์ค‘๋ณต ์ด๋ฒคํŠธ ์‹œ๋‚˜๋ฆฌ์˜ค๋ฅผ ์ž˜ ์ปค๋ฒ„ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ถ”๊ฐ€๋กœ, productCacheService์—์„œ ์˜ˆ์™ธ ๋ฐœ์ƒ ์‹œ ack.acknowledge()๊ฐ€ ํ˜ธ์ถœ๋˜์ง€ ์•Š๋Š”์ง€ ๊ฒ€์ฆํ•˜๋Š” ํ…Œ์ŠคํŠธ๊ฐ€ ์žˆ์œผ๋ฉด ์žฌ์ฒ˜๋ฆฌ ๋กœ์ง์˜ ์ •ํ™•์„ฑ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๐Ÿ”Ž ์˜ˆ์™ธ ์ผ€์ด์Šค ํ…Œ์ŠคํŠธ ์˜ˆ์‹œ
@Test
@DisplayName("์บ์‹œ ๋ฌดํšจํ™” ์‹คํŒจ ์‹œ ackํ•˜์ง€ ์•Š๊ณ  ์žฌ์ฒ˜๋ฆฌ๋ฅผ ์œ„ํ•ด ์˜ˆ์™ธ๋ฅผ ์ „ํŒŒํ•˜์ง€ ์•Š๋Š”๋‹ค")
void consumeTest3() {
    StockDepletedEvent event = StockDepletedEvent.of(1L);
    when(eventHandledRepository.existsByEventId("200")).thenReturn(false);
    doThrow(new RuntimeException("Cache error"))
        .when(productCacheService).deleteProductDetail(1L);

    consumer.consume(event, "200", acknowledgment);

    verify(acknowledgment, never()).acknowledge();
    verify(eventHandledRepository, never()).save(any());
}
apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/StockDepletedConsumer.java (1)

37-44: ์บ์‹œ ๋ฌดํšจํ™”์™€ DB ์ €์žฅ ์ˆœ์„œ ๊ณ ๋ ค

ํ˜„์žฌ ์ˆœ์„œ: ์บ์‹œ ๋ฌดํšจํ™” โ†’ ์ด๋ฒคํŠธ ์ €์žฅ โ†’ ack. ๋งŒ์•ฝ ์บ์‹œ ๋ฌดํšจํ™”๋Š” ์„ฑ๊ณตํ–ˆ์ง€๋งŒ eventHandledRepository.save์—์„œ ์˜ˆ์™ธ๊ฐ€ ๋ฐœ์ƒํ•˜๋ฉด, ์žฌ์ฒ˜๋ฆฌ ์‹œ ์บ์‹œ๊ฐ€ ๋‹ค์‹œ ๋ฌดํšจํ™”๋ฉ๋‹ˆ๋‹ค. ์บ์‹œ ๋ฌดํšจํ™”๋Š” ๋ฉฑ๋“ฑ์„ฑ์ด ์žˆ์œผ๋ฏ€๋กœ ํฐ ๋ฌธ์ œ๋Š” ์•„๋‹ˆ์ง€๋งŒ, ์ˆœ์„œ๋ฅผ ๋ฐ”๊พธ๋ฉด ๋ถˆํ•„์š”ํ•œ ์บ์‹œ ์—ฐ์‚ฐ์„ ์ค„์ผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ˆœ์„œ ๋ณ€๊ฒฝ ์ œ์•ˆ (์„ ํƒ์ )
         try {
+            eventHandledRepository.save(EventHandled.create(eventId));
             processStockDepletedEvent(event);
-            eventHandledRepository.save(EventHandled.create(eventId));
             ack.acknowledge();

๋‹จ, ์ด ๊ฒฝ์šฐ ์ด๋ฒคํŠธ๊ฐ€ "์ฒ˜๋ฆฌ๋จ"์œผ๋กœ ํ‘œ์‹œ๋œ ํ›„ ์บ์‹œ ๋ฌดํšจํ™”๊ฐ€ ์‹คํŒจํ•˜๋ฉด ์ด๋ฒคํŠธ๊ฐ€ ์†์‹ค๋  ์ˆ˜ ์žˆ์œผ๋ฏ€๋กœ, ํ˜„์žฌ ์ˆœ์„œ๊ฐ€ ๋” ์•ˆ์ „ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/ProductMetricsAggregation.java (1)

3-45: LGTM - Java Record๋กœ ๊ฐ„์†Œํ™” ๊ฐ€๋Šฅ

๋ถˆ๋ณ€ ๋ฐ์ดํ„ฐ ํ™€๋”๋กœ ์ ์ ˆํžˆ ๊ตฌํ˜„๋˜์—ˆ์Šต๋‹ˆ๋‹ค. ๋ณด์ผ๋Ÿฌํ”Œ๋ ˆ์ดํŠธ ์ฝ”๋“œ๋ฅผ ์ค„์ด๋ ค๋ฉด Java Record๋กœ ๋ณ€ํ™˜ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๐Ÿ”Ž Record ๋ณ€ํ™˜ ์˜ˆ์‹œ
package com.loopers.infrastructure.batch;

public record ProductMetricsAggregation(
    Long productId,
    Long viewCount,
    Long likeCount,
    Long orderCount,
    Long totalQuantity,
    Long score
) {}
apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java (1)

80-121: ์ฃผ๊ฐ„/์›”๊ฐ„ ๋žญํ‚น ๋ฉ”์„œ๋“œ ์ค‘๋ณต ์ฝ”๋“œ

getWeeklyRankings์™€ getMonthlyRankings ๋ฉ”์„œ๋“œ๊ฐ€ ๊ฑฐ์˜ ๋™์ผํ•œ ๊ตฌ์กฐ๋ฅผ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ํŽ˜์ด์ง• ์ฒ˜๋ฆฌ, Product ์กฐํšŒ, RankingResponse ์ƒ์„ฑ ๋กœ์ง์ด ๋ฐ˜๋ณต๋ฉ๋‹ˆ๋‹ค.

๊ณตํ†ต ๋กœ์ง์„ ์ œ๋„ค๋ฆญ ํ—ฌํผ ๋ฉ”์„œ๋“œ๋กœ ์ถ”์ถœํ•˜๋ฉด ์œ ์ง€๋ณด์ˆ˜์„ฑ์„ ๊ฐœ์„ ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ๋‹น์žฅ ํ•„์ˆ˜๋Š” ์•„๋‹ˆ์ง€๋งŒ, ํ–ฅํ›„ ๊ธฐ๊ฐ„ ํƒ€์ž… ์ถ”๊ฐ€ ์‹œ ์ค‘๋ณต์ด ๋” ๋Š˜์–ด๋‚  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

Also applies to: 123-165

apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/RankingRedisService.java (2)

80-86: TTL ์„ค์ • ์‹œ ๊ฒฝํ•ฉ ์กฐ๊ฑด (Race Condition)

hasKey() ์ฒดํฌ์™€ incrementScore() + expire() ํ˜ธ์ถœ ์‚ฌ์ด์— ๋‹ค๋ฅธ ์Šค๋ ˆ๋“œ๊ฐ€ ๋™์ผ ํ‚ค๋ฅผ ์ƒ์„ฑํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์ด ๊ฒฝ์šฐ TTL์ด ์„ค์ •๋˜์ง€ ์•Š๊ฑฐ๋‚˜ ์˜๋„์น˜ ์•Š๊ฒŒ ์—ฐ์žฅ๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๋žญํ‚น ์œ ์Šค์ผ€์ด์Šค์—์„œ ์น˜๋ช…์ ์ด์ง€๋Š” ์•Š์ง€๋งŒ, Lua ์Šคํฌ๋ฆฝํŠธ๋‚˜ ZADD with NX ์˜ต์…˜์„ ์‚ฌ์šฉํ•œ ์›์ž์  ์ฒ˜๋ฆฌ๋ฅผ ๊ณ ๋ คํ•ด๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.


37-40: ์ž ์žฌ์  ์˜ˆ์™ธ ์ฒ˜๋ฆฌ ๋ˆ„๋ฝ

tuple.getValue()๊ฐ€ null์ด๊ฑฐ๋‚˜ ์œ ํšจํ•œ Long ํ˜•์‹์ด ์•„๋‹ ๊ฒฝ์šฐ NullPointerException ๋˜๋Š” NumberFormatException์ด ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. Redis์— ์ €์žฅ๋œ ๋ฐ์ดํ„ฐ๊ฐ€ ํ•ญ์ƒ ์œ ํšจํ•˜๋‹ค๊ณ  ๊ฐ€์ •ํ•˜์ง€๋งŒ, ๋ฐฉ์–ด์  ์ฒ˜๋ฆฌ๋ฅผ ๊ณ ๋ คํ•ด๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/domain/order/event/OrderCompletedEvent.java (1)

57-59: ์ด๋ฒคํŠธ ๋ถˆ๋ณ€์„ฑ์„ ์œ„ํ•œ ๋ฐฉ์–ด์  ๋ณต์‚ฌ ๊ณ ๋ ค

getItems()๊ฐ€ ๋‚ด๋ถ€ ๋ฆฌ์ŠคํŠธ๋ฅผ ์ง์ ‘ ๋ฐ˜ํ™˜ํ•ฉ๋‹ˆ๋‹ค. ์ด๋ฒคํŠธ ๋ถˆ๋ณ€์„ฑ์„ ๋ณด์žฅํ•˜๋ ค๋ฉด Collections.unmodifiableList() ๋˜๋Š” ๋ณต์‚ฌ๋ณธ ๋ฐ˜ํ™˜์„ ๊ณ ๋ คํ•ด๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/WeeklyRankingJobConfig.java (2)

132-154: ๋‹จ์ผ ์Šค๋ ˆ๋“œ ์ปจํ…์ŠคํŠธ์—์„œ AtomicInteger ์‚ฌ์šฉ ๋ฐ ๋‚ ์งœ ํŒŒ์‹ฑ ์ค‘๋ณต

ํ˜„์žฌ Step ๊ตฌ์„ฑ์—๋Š” taskExecutor๊ฐ€ ์—†์œผ๋ฏ€๋กœ processor๋Š” ๋‹จ์ผ ์Šค๋ ˆ๋“œ๋กœ ์ˆœ์ฐจ ์‹คํ–‰๋ฉ๋‹ˆ๋‹ค. AtomicInteger (๋ผ์ธ 141)๋Š” ์ •ํ™•ํžˆ ๋™์ž‘ํ•˜์ง€๋งŒ, ๋‹จ์ˆœ int ๋ณ€์ˆ˜๋กœ๋„ ์ถฉ๋ถ„ํ•ฉ๋‹ˆ๋‹ค. ๋˜ํ•œ targetDateStr๊ฐ€ listener(๋ผ์ธ 80), reader(๋ผ์ธ 92), processor(๋ผ์ธ 137)์—์„œ ๊ฐ๊ฐ ๋…๋ฆฝ์ ์œผ๋กœ ํŒŒ์‹ฑ๋˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

์„ ํƒ์  ๊ฐœ์„  ์‚ฌํ•ญ:

  • ๋‹จ์ผ ์Šค๋ ˆ๋“œ ํ™˜๊ฒฝ์—์„œ๋Š” ์ผ๋ฐ˜ int ์นด์šดํ„ฐ ์‚ฌ์šฉ
  • ๋‚ ์งœ ๊ณ„์‚ฐ์„ ๊ณตํ†ต ์œ ํ‹ธ๋ฆฌํ‹ฐ ๋ฉ”์„œ๋“œ๋กœ ์ถ”์ถœํ•˜์—ฌ ์ค‘๋ณต ์ œ๊ฑฐ

ํ˜„์žฌ ๊ตฌํ˜„์€ ๋ช…ํ™•ํ•˜๊ณ  ์ •ํ™•ํ•˜๊ฒŒ ๋™์ž‘ํ•˜๋ฏ€๋กœ ์ฆ‰์‹œ ์ˆ˜์ •์ด ํ•„์š”ํ•œ ๊ฒƒ์€ ์•„๋‹™๋‹ˆ๋‹ค.


32-164: MonthlyRankingJobConfig์™€์˜ ์ฝ”๋“œ ์ค‘๋ณต ๊ณ ๋ ค

WeeklyRankingJobConfig์™€ MonthlyRankingJobConfig๋Š” ๊ฑฐ์˜ ๋™์ผํ•œ ๊ตฌ์กฐ๋ฅผ ๊ฐ€์ง€๊ณ  ์žˆ์œผ๋ฉฐ, ๊ธฐ๊ฐ„ ๊ณ„์‚ฐ ๋กœ์ง๊ณผ ์—”ํ‹ฐํ‹ฐ ํƒ€์ž…๋งŒ ๋‹ค๋ฆ…๋‹ˆ๋‹ค. ์Šค์ฝ”์–ด ๊ณ„์‚ฐ์‹ (๋ผ์ธ 120), chunk size, TOP_LIMIT ๋“ฑ ์ƒ๋‹น ๋ถ€๋ถ„์ด ์ค‘๋ณต๋ฉ๋‹ˆ๋‹ค.

ํ–ฅํ›„ ์œ ์ง€๋ณด์ˆ˜์„ฑ ํ–ฅ์ƒ์„ ์œ„ํ•œ ์„ ํƒ์  ๋ฆฌํŒฉํ† ๋ง ๋ฐฉ์•ˆ:

  • ๊ณตํ†ต ๋กœ์ง์„ ์ถ”์ƒ ๋ฒ ์ด์Šค ํด๋ž˜์Šค๋‚˜ ํ—ฌํผ ๋ฉ”์„œ๋“œ๋กœ ์ถ”์ถœ
  • ์Šค์ฝ”์–ด ๊ณ„์‚ฐ ๋กœ์ง์„ ๊ณต์œ  ์ƒ์ˆ˜ ๋˜๋Š” ์ „๋žต ํŒจํ„ด์œผ๋กœ ๋ถ„๋ฆฌ

๋ฐฐ์น˜ ๊ตฌ์„ฑ์—์„œ ์ผ์ • ์ˆ˜์ค€์˜ ์ค‘๋ณต์€ ๋ช…ํ™•์„ฑ๊ณผ ๋…๋ฆฝ์„ฑ์„ ์œ„ํ•ด ํ—ˆ์šฉ ๊ฐ€๋Šฅํ•˜๋ฏ€๋กœ, ํ˜„์žฌ ๊ตฌํ˜„๋„ ํ•ฉ๋ฆฌ์ ์ž…๋‹ˆ๋‹ค. ์ถ”๊ฐ€ ๊ธฐ๊ฐ„ ํƒ€์ž…(๋ถ„๊ธฐ๋ณ„ ๋“ฑ)์„ ์ง€์›ํ•  ๊ณ„ํš์ด๋ผ๋ฉด ๋ฆฌํŒฉํ† ๋ง์„ ๊ถŒ์žฅํ•ฉ๋‹ˆ๋‹ค.

๐Ÿ“œ Review details

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

๐Ÿ“ฅ Commits

Reviewing files that changed from the base of the PR and between 1160a4e and 01ed56a.

๐Ÿ“’ Files selected for processing (52)
  • apps/commerce-api/build.gradle.kts
  • apps/commerce-api/src/main/java/com/loopers/application/product/ProductFacade.java
  • apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java
  • apps/commerce-api/src/main/java/com/loopers/domain/like/event/ProductLikedEvent.java
  • apps/commerce-api/src/main/java/com/loopers/domain/order/event/OrderCompletedEvent.java
  • apps/commerce-api/src/main/java/com/loopers/domain/product/ProductViewLog.java
  • apps/commerce-api/src/main/java/com/loopers/domain/product/ProductViewLogRepository.java
  • apps/commerce-api/src/main/java/com/loopers/domain/product/event/ProductViewedEvent.java
  • apps/commerce-api/src/main/java/com/loopers/domain/product/event/StockDepletedEvent.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/BatchConfig.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/MonthlyRankingJobConfig.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/ProductMetricsAggregation.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/WeeklyRankingJobConfig.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/CatalogEventConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/OrderCompletedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ProductLikedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/StockDepletedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ViewLogConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/event/ViewEventPublisher.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/ProductMetrics.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/ProductMetricsRepository.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/outbox/OutboxEventHandler.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductJpaRepository.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductViewLogJpaRepository.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductViewLogRepositoryImpl.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankMonthly.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankMonthlyRepository.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeekly.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeeklyRepository.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/RankingEntry.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/RankingRedisService.java
  • apps/commerce-api/src/main/java/com/loopers/interfaces/api/product/ProductDto.java
  • apps/commerce-api/src/main/java/com/loopers/interfaces/api/ranking/RankingController.java
  • apps/commerce-api/src/main/java/com/loopers/interfaces/api/ranking/RankingDto.java
  • apps/commerce-api/src/main/resources/application.yml
  • apps/commerce-api/src/test/java/com/loopers/application/product/ProductFacadeRankTest.java
  • apps/commerce-api/src/test/java/com/loopers/application/ranking/RankingFacadeTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/batch/MonthlyRankingJobTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/batch/WeeklyRankingJobTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/CatalogEventConsumerTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/OrderCompletedConsumerTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/ProductLikedConsumerTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/StockDepletedConsumerTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/metrics/ProductMetricsTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/outbox/OutboxEventHandlerTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/ranking/RankingRedisServiceTest.java
  • apps/commerce-api/src/test/java/com/loopers/interfaces/api/ranking/RankingApiE2ETest.java
  • docker-compose.yml
  • docs/week10/01-requirements.md
  • docs/week10/02-sequence-diagrams.md
  • docs/week9/01-requirements.md
  • docs/week9/02-sequence-diagrams.md
๐Ÿ’ค Files with no reviewable changes (2)
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/CatalogEventConsumer.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/CatalogEventConsumerTest.java
๐Ÿงฐ Additional context used
๐Ÿง  Learnings (11)
๐Ÿ“š Learning: 2025-11-09T10:41:39.297Z
Learnt from: ghojeong
Repo: Loopers-dev-lab/loopers-spring-kotlin-template PR: 25
File: apps/commerce-api/src/main/kotlin/com/loopers/domain/product/ProductRepository.kt:1-12
Timestamp: 2025-11-09T10:41:39.297Z
Learning: In this codebase, domain repository interfaces are allowed to use Spring Data's org.springframework.data.domain.Page and org.springframework.data.domain.Pageable types. This is an accepted architectural decision and should not be flagged as a DIP violation.

Applied to files:

  • apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductViewLogJpaRepository.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/ProductMetricsRepository.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeeklyRepository.java
๐Ÿ“š Learning: 2025-11-21T03:38:07.494Z
Learnt from: minor7295
Repo: Loopers-dev-lab/loopers-spring-java-template PR: 99
File: apps/commerce-api/src/main/resources/application.yml:26-30
Timestamp: 2025-11-21T03:38:07.494Z
Learning: The batch job implementation for likeCount synchronization in apps/commerce-api is temporary and intended for development environment only. It will be replaced with Event-Driven Architecture (EDA) before production deployment, so production-level configuration concerns (like profile-based initialize-schema settings) are not required.

Applied to files:

  • apps/commerce-api/src/main/resources/application.yml
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/BatchConfig.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/MonthlyRankingJobConfig.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/WeeklyRankingJobConfig.java
๐Ÿ“š Learning: 2025-12-19T09:30:12.459Z
Learnt from: HongChangMo
Repo: Loopers-dev-lab/loopers-spring-java-template PR: 198
File: apps/commerce-api/src/main/java/com/loopers/application/payment/PaymentEventListener.java:0-0
Timestamp: 2025-12-19T09:30:12.459Z
Learning: In the loopers-spring-java-template repository's commerce-api module, when entities are managed within a transactional context (e.g., Transactional methods), prefer relying on JPA dirty checking for automatic persistence rather than explicit save() calls. Both Payment and Order entities in PaymentEventListener use this pattern, with state changes automatically flushed on transaction commit.

Applied to files:

  • apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductJpaRepository.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductViewLogRepositoryImpl.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/OrderCompletedConsumerTest.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/OrderCompletedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/domain/product/ProductViewLogRepository.java
  • apps/commerce-api/src/main/java/com/loopers/domain/order/event/OrderCompletedEvent.java
๐Ÿ“š Learning: 2025-11-27T09:09:24.961Z
Learnt from: sky980221
Repo: Loopers-dev-lab/loopers-spring-java-template PR: 121
File: apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductJpaRepository.java:22-24
Timestamp: 2025-11-27T09:09:24.961Z
Learning: Product ์—”ํ‹ฐํ‹ฐ (apps/commerce-api/src/main/java/com/loopers/domain/product/Product.java)๋Š” ์œ ์ฆˆ์ผ€์ด์Šค๋ณ„๋กœ ์˜๋„์ ์œผ๋กœ ๋‹ค๋ฅธ ๋ฝ ์ „๋žต์„ ์‚ฌ์šฉํ•œ๋‹ค: ์ข‹์•„์š” ๊ธฐ๋Šฅ์—๋Š” ๋น„๊ด€์  ๋ฝ(findByIdForUpdate)์„, ์žฌ๊ณ  ์ฐจ๊ฐ์—๋Š” ๋‚™๊ด€์  ๋ฝ(Version + ์žฌ์‹œ๋„)์„ ์‚ฌ์šฉํ•œ๋‹ค.

Applied to files:

  • apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductJpaRepository.java
  • apps/commerce-api/src/main/java/com/loopers/domain/like/event/ProductLikedEvent.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ProductLikedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/ProductMetrics.java
  • apps/commerce-api/src/main/java/com/loopers/domain/product/ProductViewLog.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeekly.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankMonthly.java
  • apps/commerce-api/src/main/java/com/loopers/application/product/ProductFacade.java
๐Ÿ“š Learning: 2025-12-19T21:30:16.024Z
Learnt from: toongri
Repo: Loopers-dev-lab/loopers-spring-kotlin-template PR: 68
File: apps/commerce-api/src/main/kotlin/com/loopers/infrastructure/outbox/OutboxEventListener.kt:0-0
Timestamp: 2025-12-19T21:30:16.024Z
Learning: In the Loopers-dev-lab/loopers-spring-kotlin-template Kafka event pipeline, Like events (LikeCreatedEventV1, LikeCanceledEventV1) intentionally use aggregateType="Like" with aggregateId=productId. The aggregateId serves as a partitioning/grouping key (not a unique Like entity identifier), ensuring all like events for the same product go to the same partition for ordering guarantees and aligning with ProductStatisticService's product-based aggregation logic. Using individual like_id would scatter events across partitions and break the statistics aggregation pattern.

Applied to files:

  • apps/commerce-api/src/main/java/com/loopers/domain/like/event/ProductLikedEvent.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/event/ViewEventPublisher.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ProductLikedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/outbox/OutboxEventHandler.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/ProductLikedConsumerTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/outbox/OutboxEventHandlerTest.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/ProductMetricsAggregation.java
๐Ÿ“š Learning: 2025-12-19T03:23:54.756Z
Learnt from: minor7295
Repo: Loopers-dev-lab/loopers-spring-java-template PR: 191
File: modules/kafka/src/testFixtures/java/com/loopers/testcontainers/KafkaTestContainersConfig.java:24-34
Timestamp: 2025-12-19T03:23:54.756Z
Learning: In the loopers-spring-java-template project, test container configurations (MySQL, Redis, Kafka) use static initialization blocks for consistency across the template. This pattern should be maintained for uniformity, even if alternative lifecycle management approaches exist.

Applied to files:

  • apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/BatchConfig.java
๐Ÿ“š Learning: 2025-12-19T20:59:57.713Z
Learnt from: toongri
Repo: Loopers-dev-lab/loopers-spring-kotlin-template PR: 68
File: docs/week8/round8-detailed-design.md:151-178
Timestamp: 2025-12-19T20:59:57.713Z
Learning: In the Loopers-dev-lab/loopers-spring-kotlin-template repository's Kafka event pipeline, only 5 domain events are intentionally published to Kafka via CloudEventEnvelopeFactory: OrderPaidEventV1, LikeCreatedEventV1, LikeCanceledEventV1, ProductViewedEventV1, and StockDepletedEventV1. Other domain events (OrderCreatedEventV1, OrderCanceledEventV1, PaymentCreatedEventV1, PaymentPaidEventV1, PaymentFailedEventV1) are internal-only and intentionally not mapped in resolveMetadata(), which correctly returns null for them to exclude them from Outbox publication.

Applied to files:

  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/StockDepletedConsumerTest.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/event/ViewEventPublisher.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/OrderCompletedConsumerTest.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ProductLikedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/outbox/OutboxEventHandler.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/OrderCompletedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ViewLogConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/domain/product/event/ProductViewedEvent.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/ProductLikedConsumerTest.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/outbox/OutboxEventHandlerTest.java
  • apps/commerce-api/src/main/java/com/loopers/domain/order/event/OrderCompletedEvent.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/StockDepletedConsumer.java
๐Ÿ“š Learning: 2025-12-18T13:24:54.339Z
Learnt from: kilian-develop
Repo: Loopers-dev-lab/loopers-spring-java-template PR: 190
File: apps/commerce-streamer/src/main/java/com/loopers/applications/streamer/consumer/product/IncreaseProductViewKafkaConsumer.java:25-35
Timestamp: 2025-12-18T13:24:54.339Z
Learning: In this codebase, Kafka consumers delegate error handling and event tracking to the service layer via EventInboxAspect. Service methods annotated with InboxEvent are intercepted by the aspect, which handles failures by saving failed EventInbox entries and logging errors. This centralized approach avoids duplicating error handling logic across multiple consumers.

Applied to files:

  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/StockDepletedConsumerTest.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ProductLikedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/OrderCompletedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ViewLogConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/StockDepletedConsumer.java
๐Ÿ“š Learning: 2025-12-19T23:39:20.851Z
Learnt from: toongri
Repo: Loopers-dev-lab/loopers-spring-kotlin-template PR: 68
File: apps/commerce-streamer/src/main/kotlin/com/loopers/interfaces/consumer/product/ProductEventConsumer.kt:0-0
Timestamp: 2025-12-19T23:39:20.851Z
Learning: In Loopers-dev-lab/loopers-spring-kotlin-template, toongri prefers pragmatic idempotency handling in Kafka consumers: when idempotency key persistence fails after successful business logic execution, log a warning and continue (accepting low risk of duplicates on retry) rather than rolling back business data. This keeps business logic decoupled from idempotency store (which might be Redis/external system, not RDB), avoids over-engineering for rare edge cases, and prioritizes core business value over auxiliary metadata. Transaction-based atomicity between business data and idempotency keys is considered excessive when duplicate event probability is very low.

Applied to files:

  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/StockDepletedConsumerTest.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ProductLikedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/OrderCompletedConsumer.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ViewLogConsumer.java
  • apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/ProductLikedConsumerTest.java
  • apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/StockDepletedConsumer.java
๐Ÿ“š Learning: 2025-12-02T08:12:06.383Z
Learnt from: junoade
Repo: Loopers-dev-lab/loopers-spring-java-template PR: 0
File: :0-0
Timestamp: 2025-12-02T08:12:06.383Z
Learning: ProductQueryService์—์„œ ์ƒํ’ˆ ๋ชฉ๋ก ์กฐํšŒ ์‹œ Redis ์บ์‹œ๋ฅผ ์ ์šฉํ–ˆ์œผ๋ฉฐ, ์บ์‹œ ํ‚ค๋Š” brandId, sortType, pageNumber, pageSize์˜ ์กฐํ•ฉ์œผ๋กœ ๊ตฌ์„ฑ๋˜๊ณ  TTL์€ 5๋ถ„์œผ๋กœ ์„ค์ •๋˜์–ด ์žˆ๋‹ค.

Applied to files:

  • apps/commerce-api/src/main/java/com/loopers/interfaces/api/product/ProductDto.java
  • apps/commerce-api/src/main/java/com/loopers/application/product/ProductFacade.java
๐Ÿ“š Learning: 2025-11-12T13:04:50.782Z
Learnt from: kilian-develop
Repo: Loopers-dev-lab/loopers-spring-java-template PR: 72
File: core/domain/src/main/java/com/loopers/core/domain/productlike/vo/ProductLikeId.java:5-7
Timestamp: 2025-11-12T13:04:50.782Z
Learning: In the com.loopers codebase, domain entity ID value objects (e.g., ProductLikeId, OrderItemId, ProductId, PaymentId, OrderId, BrandId) are system-generated identifiers and do not require pattern validation (regex, length checks). They are implemented as simple records with a String value and an empty() factory method returning null for unsaved entities. This differs from UserIdentifier, which is a user-supplied login ID that requires format validation. Domain IDs should not be flagged for missing validation logic in the create() method.
<!-- [add_learning]
UserIdentifier์™€ ๊ฐ™์€ ์‚ฌ์šฉ์ž ์ž…๋ ฅ ID์™€ ProductLikeId, OrderItemId ๋“ฑ์˜ ๋„๋ฉ”์ธ ID๋Š” ๊ฒ€์ฆ ํŒจํ„ด์ด ๋‹ค๋ฆ…๋‹ˆ๋‹ค. UserIdentifier๋Š” ์‚ฌ์šฉ์ž๊ฐ€ ์ž…๋ ฅํ•˜๋Š” ๋กœ๊ทธ์ธ ID๋กœ์„œ ์ •๊ทœ์‹, ๊ธธ์ด ๋“ฑ์˜ ํ˜•์‹ ๊ฒ€์ฆ์ด ํ•„์š”ํ•˜์ง€๋งŒ, ๋„๋ฉ”์ธ ID๋Š” ์‹œ์Šคํ…œ์—์„œ ์ƒ์„ฑํ•˜๋Š” ์‹๋ณ„์ž(UUID, DB ์ƒ์„ฑ ID)์ด๋ฏ€๋กœ ํŒจํ„ด ๊ฒ€์ฆ์ด ๋ถˆํ•„์š”ํ•ฉ๋‹ˆ๋‹ค. ๋„๋ฉ”์ธ ID VO๋Š” ๋‹จ์ˆœํ•œ record์™€ empty() ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ๋งŒ์œผ๋กœ ์ถฉ๋ถ„ํ•ฉ๋‹ˆ๋‹ค.

Applied to files:

  • apps/commerce-api/src/main/java/com/loopers/domain/product/ProductViewLog.java
๐Ÿงฌ Code graph analysis (11)
apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/StockDepletedConsumerTest.java (1)
apps/commerce-api/src/main/java/com/loopers/domain/product/event/StockDepletedEvent.java (1)
  • StockDepletedEvent (5-29)
apps/commerce-api/src/main/java/com/loopers/infrastructure/event/ViewEventPublisher.java (2)
apps/commerce-api/src/main/java/com/loopers/domain/product/event/ProductViewedEvent.java (1)
  • ProductViewedEvent (5-29)
apps/commerce-api/src/main/java/com/loopers/application/product/ProductFacade.java (1)
  • Component (24-111)
apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/MonthlyRankingJobConfig.java (1)
apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/WeeklyRankingJobConfig.java (1)
  • Configuration (32-164)
apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/OrderCompletedConsumerTest.java (1)
apps/commerce-api/src/main/java/com/loopers/domain/order/event/OrderCompletedEvent.java (1)
  • OrderCompletedEvent (8-85)
apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/WeeklyRankingJobConfig.java (1)
apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/MonthlyRankingJobConfig.java (1)
  • Configuration (32-167)
apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ProductLikedConsumer.java (1)
apps/commerce-api/src/main/java/com/loopers/domain/like/event/ProductLikedEvent.java (1)
  • ProductLikedEvent (5-45)
apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/OrderCompletedConsumer.java (1)
apps/commerce-api/src/main/java/com/loopers/domain/order/event/OrderCompletedEvent.java (1)
  • OrderCompletedEvent (8-85)
apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ViewLogConsumer.java (5)
apps/commerce-api/src/main/java/com/loopers/domain/product/event/ProductViewedEvent.java (1)
  • ProductViewedEvent (5-29)
apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductViewLogRepositoryImpl.java (1)
  • RequiredArgsConstructor (10-20)
apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/OrderCompletedConsumer.java (1)
  • Slf4j (20-65)
apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ProductLikedConsumer.java (1)
  • Slf4j (20-65)
apps/pg-simulator/src/main/kotlin/com/loopers/interfaces/api/ApiControllerAdvice.kt (1)
  • log (22-119)
apps/commerce-api/src/test/java/com/loopers/application/product/ProductFacadeRankTest.java (1)
apps/commerce-api/src/main/java/com/loopers/interfaces/api/product/ProductDto.java (1)
  • ProductDto (11-99)
apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeekly.java (1)
apps/pg-simulator/src/main/kotlin/com/loopers/domain/payment/Payment.kt (1)
  • name (14-87)
apps/commerce-api/src/test/java/com/loopers/application/ranking/RankingFacadeTest.java (1)
apps/commerce-api/src/main/java/com/loopers/interfaces/api/ranking/RankingDto.java (1)
  • RankingDto (5-23)
๐Ÿ”‡ Additional comments (57)
apps/commerce-api/src/main/resources/application.yml (1)

76-78: ๋กœ์ปฌ/ํ…Œ์ŠคํŠธ ํ”„๋กœํ•„์— ๋Œ€ํ•œ ๋ฐฐ์น˜ ์Šคํ‚ค๋งˆ ์ดˆ๊ธฐํ™” ์„ค์ •์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

Spring Batch ๋ฉ”ํƒ€๋ฐ์ดํ„ฐ ํ…Œ์ด๋ธ”์˜ ์ž๋™ ์ดˆ๊ธฐํ™”๋ฅผ local, test ํ”„๋กœํ•„์—์„œ๋งŒ ํ™œ์„ฑํ™”ํ•œ ๊ฒƒ์€ ์˜ฌ๋ฐ”๋ฅธ ์ ‘๊ทผ์ž…๋‹ˆ๋‹ค. initialize-schema: always ์„ค์ •์€ ์• ํ”Œ๋ฆฌ์ผ€์ด์…˜ ์‹œ์ž‘ ์‹œ๋งˆ๋‹ค ๋ฐฐ์น˜ ์Šคํ‚ค๋งˆ๋ฅผ ์žฌ์ƒ์„ฑํ•˜์—ฌ ๊ฐœ๋ฐœ/ํ…Œ์ŠคํŠธ ํ™˜๊ฒฝ์—์„œ ๊นจ๋—ํ•œ ์ƒํƒœ๋ฅผ ๋ณด์žฅํ•ฉ๋‹ˆ๋‹ค. ํ”„๋กœ๋•์…˜ ํ”„๋กœํ•„์—์„œ๋Š” ์ด ์„ค์ •์ด ์—†๋Š” ๊ฒƒ๋„ ํ™•์ธ๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

์ฐธ๊ณ : ํ•„์š”ํ•˜๋‹ค๋ฉด always ๋Œ€์‹  embedded๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์ž„๋ฒ ๋””๋“œ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค์—์„œ๋งŒ ์ดˆ๊ธฐํ™”ํ•˜๋„๋ก ์ œํ•œํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ํ•˜์ง€๋งŒ ํ˜„์žฌ ์„ค์ •๋„ ๋กœ์ปฌ/ํ…Œ์ŠคํŠธ ํ™˜๊ฒฝ์— ์ ํ•ฉํ•ฉ๋‹ˆ๋‹ค.

docs/week9/02-sequence-diagrams.md (4)

1-35: โœ… ์Šน์ธ: ์ผ์ผ ์ƒํ’ˆ ์ƒ์„ธ ์กฐํšŒ ํ๋ฆ„์ด ๋ช…ํ™•ํ•ฉ๋‹ˆ๋‹ค.

Redis ZSET์—์„œ ๋žญํ‚น์„ ์กฐํšŒํ•œ ํ›„ ๋ทฐ ์ด๋ฒคํŠธ๋ฅผ ๋ฐœํ–‰ํ•˜๊ณ , ์ปจ์Šˆ๋จธ๊ฐ€ ์Šค์ฝ”์–ด๋ฅผ ์ฆ๊ฐ€์‹œํ‚ค๋Š” ํ๋ฆ„์ด ์ •ํ™•ํ•˜๊ฒŒ ํ‘œํ˜„๋˜์—ˆ์Šต๋‹ˆ๋‹ค.


39-63: โœ… ์Šน์ธ: Like ์ด๋ฒคํŠธ ํ๋ฆ„์ด ์˜ฌ๋ฐ”๋ฆ…๋‹ˆ๋‹ค.

๋ฉฑ๋“ฑ์„ฑ ์ฒดํฌ ํ›„ ์กฐ๊ฑด๋ถ€๋กœ Redis ์Šค์ฝ”์–ด๋ฅผ ์—…๋ฐ์ดํŠธํ•˜๋Š” ๋กœ์ง์ด ๋ช…ํ™•ํ•˜๊ฒŒ ํ‘œํ˜„๋˜์—ˆ์Šต๋‹ˆ๋‹ค.


67-87: โœ… ์Šน์ธ: Order ์ด๋ฒคํŠธ ํ๋ฆ„์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

๊ฐ OrderItem์— ๋Œ€ํ•ด ๊ฐ€์ค‘์น˜(0.6 ร— quantity)๋กœ ์Šค์ฝ”์–ด๋ฅผ ์—…๋ฐ์ดํŠธํ•˜๋Š” ์ฒ˜๋ฆฌ๊ฐ€ ๋ช…ํ™•ํ•ฉ๋‹ˆ๋‹ค.


111-128: โœ… ์Šน์ธ: ZSET ํ‚ค ์ „๋žต๊ณผ TTL ์„ค์ •์ด ๋ช…ํ™•ํ•ฉ๋‹ˆ๋‹ค.

ํ‚ค ํ˜•์‹(ranking:all:{yyyyMMdd})๊ณผ TTL(2์ผ, 172800์ดˆ) ์„ค์ •์ด ์ •ํ™•ํ•˜๊ฒŒ ํ‘œํ˜„๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/domain/product/event/ProductViewedEvent.java (2)

1-29: ์ด๋ฒคํŠธ ๊ตฌ์กฐ๊ฐ€ ์ž˜ ์„ค๊ณ„๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

๋ถˆ๋ณ€ ์ด๋ฒคํŠธ๋กœ ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ์„ค๊ณ„๋˜์—ˆ๊ณ , ์ •์  ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ ํŒจํ„ด์„ ์‚ฌ์šฉํ•˜์—ฌ ์ธ์Šคํ„ด์Šค ์ƒ์„ฑ์„ ์ œ์–ดํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ํ”„๋ ˆ์ž„์›Œํฌ ํ˜ธํ™˜์„ฑ์„ ์œ„ํ•œ protected ์ƒ์„ฑ์ž๋„ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.


7-8: ํƒ€์ž„์กด ์ •๋ณด๊ฐ€ ์—†๋Š” LocalDateTime ์‚ฌ์šฉ์„ ์žฌ๊ณ ํ•˜์„ธ์š”.

LocalDateTime.now()๋Š” ์‹œ์Šคํ…œ ๊ธฐ๋ณธ ํƒ€์ž„์กด์„ ์‚ฌ์šฉํ•˜๋ฏ€๋กœ ๋ถ„์‚ฐ ํ™˜๊ฒฝ์—์„œ ์ผ๊ด€์„ฑ ๋ฌธ์ œ๊ฐ€ ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ํŠนํžˆ Kafka๋ฅผ ํ†ตํ•ด ์ด๋ฒคํŠธ๊ฐ€ ์ „ํŒŒ๋˜๊ณ  ๋ฐฐ์น˜ ์ž‘์—…์—์„œ ์ผ๋ณ„ ์ง‘๊ณ„๋ฅผ ์ˆ˜ํ–‰ํ•˜๋Š” ํ˜„์žฌ ์•„ํ‚คํ…์ฒ˜์—์„œ๋Š” UTC ๊ธฐ๋ฐ˜ ํƒ€์ž„์Šคํƒฌํ”„๊ฐ€ ํ•„์ˆ˜์ ์ž…๋‹ˆ๋‹ค.

๐Ÿ”Ž Instant ์‚ฌ์šฉ์œผ๋กœ ๋ณ€๊ฒฝ ์ œ์•ˆ
-import java.time.LocalDateTime;
+import java.time.Instant;

 public class ProductViewedEvent {

     private Long productId;
-    private LocalDateTime occurredAt;
+    private Instant occurredAt;

     private ProductViewedEvent(Long productId) {
         this.productId = productId;
-        this.occurredAt = LocalDateTime.now();
+        this.occurredAt = Instant.now();
     }

-    public LocalDateTime getOccurredAt() {
+    public Instant getOccurredAt() {
         return occurredAt;
     }
}

Also applies to: 13-15

โ›” Skipped due to learnings
Learnt from: jikimee64
Repo: Loopers-dev-lab/loopers-spring-kotlin-template PR: 71
File: apps/commerce-streamer/src/main/kotlin/com/loopers/application/ranking/RankingFacade.kt:167-173
Timestamp: 2025-12-22T16:33:50.678Z
Learning: In the Loopers-dev-lab/loopers-spring-kotlin-template repository, using system default timezone (ZonedDateTime.now() without explicit ZoneId) in date key calculations is an intentional design choice. The deployment ensures all instances share the same timezone configuration.
apps/commerce-api/src/test/java/com/loopers/infrastructure/outbox/OutboxEventHandlerTest.java (1)

51-51: ํ† ํ”ฝ ๋ณ€๊ฒฝ์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

ProductLikedEvent๋ฅผ ์ „์šฉ ํ† ํ”ฝ "product-liked"๋กœ ๋ถ„๋ฆฌํ•œ ๊ฒƒ์€ ์ด๋ฒคํŠธ ์ข…๋ฅ˜๋ณ„๋กœ ํ† ํ”ฝ์„ ๋ถ„๋ฆฌํ•˜๋Š” ๋ชจ๋ฒ” ์‚ฌ๋ก€๋ฅผ ๋”ฐ๋ฆ…๋‹ˆ๋‹ค. ํ…Œ์ŠคํŠธ ์—…๋ฐ์ดํŠธ๊ฐ€ OutboxEventHandler์˜ ๋ณ€๊ฒฝ ์‚ฌํ•ญ๊ณผ ์ผ์น˜ํ•ฉ๋‹ˆ๋‹ค.

Based on learnings, ์ด ๋ณ€๊ฒฝ์€ Kafka ์ด๋ฒคํŠธ ํŒŒ์ดํ”„๋ผ์ธ์˜ ์ผ๊ด€๋œ ํŒจํ„ด์„ ๋”ฐ๋ฆ…๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/domain/product/ProductViewLogRepository.java (1)

1-8: ๋„๋ฉ”์ธ ๋ ˆ์ด์–ด repository ์ธํ„ฐํŽ˜์ด์Šค๊ฐ€ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

DDD ์›์น™์— ๋”ฐ๋ผ ๋„๋ฉ”์ธ ๋ ˆ์ด์–ด์— ์ธํ„ฐํŽ˜์ด์Šค๋ฅผ ์ •์˜ํ•˜๊ณ  ์ธํ”„๋ผ ๋ ˆ์ด์–ด์—์„œ ๊ตฌํ˜„ํ•˜๋Š” ๊น”๋”ํ•œ ๊ตฌ์กฐ์ž…๋‹ˆ๋‹ค. ๋ฐฐ์น˜ ์ €์žฅ ๋ฉ”์„œ๋“œ๋Š” ViewLogConsumer์˜ ์œ ์Šค์ผ€์ด์Šค์— ์ ํ•ฉํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/RankingEntry.java (1)

1-7: ๊ฐ„๊ฒฐํ•˜๊ณ  ์ ์ ˆํ•œ ๋ ˆ์ฝ”๋“œ ์ •์˜์ž…๋‹ˆ๋‹ค.

Redis ๊ธฐ๋ฐ˜ ๋žญํ‚น ๋ฐ์ดํ„ฐ๋ฅผ ์ „๋‹ฌํ•˜๊ธฐ ์œ„ํ•œ ๋ถˆ๋ณ€ ๋ฐ์ดํ„ฐ ๊ตฌ์กฐ๋กœ record๋ฅผ ์‚ฌ์šฉํ•œ ๊ฒƒ์ด ์ ํ•ฉํ•ฉ๋‹ˆ๋‹ค. productId์™€ score ํ•„๋“œ๋Š” ๋žญํ‚น ์‹œ์Šคํ…œ์˜ ํ•ต์‹ฌ ์ •๋ณด๋ฅผ ๋ช…ํ™•ํ•˜๊ฒŒ ํ‘œํ˜„ํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/build.gradle.kts (2)

10-11: Spring Batch ์˜์กด์„ฑ ์ถ”๊ฐ€๊ฐ€ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

์ฃผ๊ฐ„/์›”๊ฐ„ ๋žญํ‚น ์ง‘๊ณ„๋ฅผ ์œ„ํ•œ ๋ฐฐ์น˜ ์ž‘์—… ๊ตฌํ˜„์— ํ•„์š”ํ•œ ์˜์กด์„ฑ์ž…๋‹ˆ๋‹ค. Spring Boot BOM์„ ํ†ตํ•ด ๋ฒ„์ „ ๊ด€๋ฆฌ๊ฐ€ ์ž๋™์œผ๋กœ ์ด๋ฃจ์–ด์ง‘๋‹ˆ๋‹ค.


32-33: ํ…Œ์ŠคํŠธ ์˜์กด์„ฑ ์ถ”๊ฐ€๊ฐ€ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

๋ฐฐ์น˜ ์ž‘์—… ํ…Œ์ŠคํŠธ๋ฅผ ์œ„ํ•ด spring-batch-test๋ฅผ ์ถ”๊ฐ€ํ•œ ๊ฒƒ์ด ์˜ฌ๋ฐ”๋ฆ…๋‹ˆ๋‹ค. testImplementation ์Šค์ฝ”ํ”„๋กœ ํ”„๋กœ๋•์…˜ ์ฝ”๋“œ์™€ ๋ถ„๋ฆฌ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/infrastructure/batch/MonthlyRankingJobTest.java (2)

28-30: ๋ฐฐ์น˜ ํ…Œ์ŠคํŠธ ์„ค์ •์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

@SpringBatchTest๋กœ ๋ฐฐ์น˜ ํ…Œ์ŠคํŠธ ์œ ํ‹ธ๋ฆฌํ‹ฐ๋ฅผ ํ™œ์„ฑํ™”ํ•˜๊ณ , @SpringBootTest๋กœ ์ „์ฒด ์ปจํ…์ŠคํŠธ๋ฅผ ๋กœ๋“œํ•˜๋ฉฐ, @ActiveProfiles("test")๋กœ ํ…Œ์ŠคํŠธ ํ”„๋กœํŒŒ์ผ์„ ์‚ฌ์šฉํ•˜๋Š” ๊ตฌ์„ฑ์ด ์˜ฌ๋ฐ”๋ฆ…๋‹ˆ๋‹ค.


46-51: ํ…Œ์ŠคํŠธ ๊ฒฉ๋ฆฌ๊ฐ€ ์ž˜ ๊ตฌํ˜„๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.

๊ฐ ํ…Œ์ŠคํŠธ ์ „์— ๋ฐ์ดํ„ฐ๋ฅผ ์ •๋ฆฌํ•˜๊ณ  Job์„ ์„ค์ •ํ•˜์—ฌ ํ…Œ์ŠคํŠธ ๊ฐ„ ๋…๋ฆฝ์„ฑ์„ ๋ณด์žฅํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/outbox/OutboxEventHandler.java (1)

50-50: ์ด๋ฒคํŠธ ์นดํ…Œ๊ณ ๋ฆฌ ์„ธ๋ถ„ํ™”๊ฐ€ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

"catalog-events"์—์„œ "stock-depleted"๋กœ ๋ณ€๊ฒฝํ•˜์—ฌ ์žฌ๊ณ  ๊ณ ๊ฐˆ ์ด๋ฒคํŠธ๋ฅผ ๋…๋ฆฝ์ ์œผ๋กœ ๋ผ์šฐํŒ…ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. StockDepletedConsumer๊ฐ€ ์˜ฌ๋ฐ”๋ฅด๊ฒŒ "stock-depleted" ํ† ํ”ฝ์„ ๋ฆฌ์Šค๋‹ํ•˜๋„๋ก ์„ค์ •๋˜์–ด ์žˆ์œผ๋ฉฐ, Kafka ์ด๋ฒคํŠธ ํŒŒ์ดํ”„๋ผ์ธ์˜ ์˜๋„๋œ ์„ค๊ณ„์™€ ์ผ์น˜ํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/ProductMetricsRepository.java (1)

13-13: findByProductIdAndDate ๋ฉ”์„œ๋“œ๊ฐ€ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

Spring Data JPA ๋„ค์ด๋ฐ ์ปจ๋ฒค์…˜์„ ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ๋”ฐ๋ฅด๊ณ  ์žˆ์œผ๋ฉฐ, Optional ๋ฐ˜ํ™˜ ํƒ€์ž…์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค. ProductMetrics ์—”ํ‹ฐํ‹ฐ์— @UniqueConstraint(columnNames = {"productId", "date"})๊ฐ€ ์ •์˜๋˜์–ด ์žˆ์–ด ๋ณตํ•ฉ ์ œ์•ฝ ์กฐ๊ฑด์ด ์žˆ์œผ๋ฏ€๋กœ, ์ผ์ผ ๋ฉ”ํŠธ๋ฆญ ์กฐํšŒ์™€ ์—…๋ฐ์ดํŠธ ์‹œ ์ฟผ๋ฆฌ ์„ฑ๋Šฅ์ด ๋ณด์žฅ๋ฉ๋‹ˆ๋‹ค.

docs/week9/01-requirements.md (1)

1-169: ์š”๊ตฌ์‚ฌํ•ญ ๋ฌธ์„œ๊ฐ€ ๋ช…ํ™•ํ•˜๊ณ  ์ฒด๊ณ„์ ์œผ๋กœ ์ž‘์„ฑ๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

Redis ZSET ๊ธฐ๋ฐ˜ ๋žญํ‚น ์‹œ์Šคํ…œ์˜ ๋ชฉํ‘œ, ๊ธฐ๋Šฅ ์š”๊ตฌ์‚ฌํ•ญ, ๊ธฐ์ˆ  ์ŠคํŽ™์ด ์ž˜ ์ •๋ฆฌ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค. ์ด๋ฒคํŠธ๋ณ„ ๊ฐ€์ค‘์น˜ ์ •์˜์™€ ์ œ์•ฝ์‚ฌํ•ญ๋„ ๋ช…ํ™•ํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/infrastructure/batch/WeeklyRankingJobTest.java (1)

56-99: ํ…Œ์ŠคํŠธ๊ฐ€ ๋žญํ‚น ๊ณ„์‚ฐ ๋กœ์ง์„ ์ž˜ ๊ฒ€์ฆํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

์Šค์ฝ”์–ด ๊ณ„์‚ฐ ๊ณต์‹๊ณผ ๋™์  ์ฒ˜๋ฆฌ(productId ์ˆœ์„œ)๊นŒ์ง€ ์ƒ์„ธํ•˜๊ฒŒ ๊ฒ€์ฆํ•˜๊ณ  ์žˆ์–ด, ๋ฐฐ์น˜ ์žก์˜ ํ•ต์‹ฌ ๋กœ์ง์ด ์ œ๋Œ€๋กœ ์ž‘๋™ํ•จ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/interfaces/api/ranking/RankingApiE2ETest.java (1)

54-93: E2E ํ…Œ์ŠคํŠธ๊ฐ€ API ๋™์ž‘์„ ์ž˜ ๊ฒ€์ฆํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

๋ฐ์ดํ„ฐ ์„ค์ •๋ถ€ํ„ฐ API ํ˜ธ์ถœ, ์‘๋‹ต ๊ฒ€์ฆ๊นŒ์ง€ ์ „์ฒด ํ๋ฆ„์„ ํฌ๊ด„์ ์œผ๋กœ ํ…Œ์ŠคํŠธํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ์ ์ˆ˜ ์ˆœ์„œ์™€ ๋žญํ‚น ๊ฐ’๊นŒ์ง€ ์ƒ์„ธํ•˜๊ฒŒ ํ™•์ธํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankMonthlyRepository.java (1)

18-19: Delete+Insert ์ „๋žต์€ ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ๊ตฌํ˜„๋˜์–ด ์žˆ์œผ๋ฉฐ, ํ˜„์žฌ ๊ทœ๋ชจ์— ์ ํ•ฉํ•ฉ๋‹ˆ๋‹ค.

์ฝ”๋“œ ๊ฒ€์ฆ ๊ฒฐ๊ณผ:

  • ๊ตฌํ˜„ ํ™•์ธ: beforeStep()์—์„œ DELETE (ProductRankMonthlyRepository.deleteByPeriodStart, ๋ผ์ธ 83), writer()์—์„œ INSERT (saveAll, ๋ผ์ธ 160-164)๊ฐ€ ์ˆœ์ฐจ์ ์œผ๋กœ ์‹คํ–‰๋ฉ๋‹ˆ๋‹ค.
  • API ์‘๋‹ต ์ฒ˜๋ฆฌ: RankingFacade์˜ getMonthlyRankings()๋Š” monthlyRanks.isEmpty() ์‹œ ๋ช…์‹œ์ ์œผ๋กœ ๋นˆ List๋ฅผ ๋ฐ˜ํ™˜ํ•ฉ๋‹ˆ๋‹ค (๋ผ์ธ 131-132). ์—๋Ÿฌ ์—†์ด ์‚ฌ์šฉ์ž์—๊ฒŒ ๋นˆ ๊ฒฐ๊ณผ๋ฅผ ๋ฐ˜ํ™˜ํ•˜๋ฏ€๋กœ ๋ฐฐ์น˜ ์‹คํ–‰ ์ค‘ ์กฐํšŒ ์š”์ฒญ๋„ ์ •์ƒ ์ฒ˜๋ฆฌ๋ฉ๋‹ˆ๋‹ค.
  • ๋ฐ์ดํ„ฐ ๊ทœ๋ชจ: TOP 100 ์ œํ•œ (MonthlyRankingJobConfig.TOP_LIMIT = 100)์ด ์ ์šฉ๋˜์–ด ์žˆ์œผ๋ฉฐ, ํ˜„์žฌ ์•ผ๊ฐ„ ๋ฐฐ์น˜ ํ™˜๊ฒฝ์—์„œ๋Š” DELETE-INSERT ๊ฐ„์˜ ์ผ์‹œ์  ๊ณต๋ฐฑ์ด ์‚ฌ์šฉ์ž ์˜ํ–ฅ์„ ํฌ๊ฒŒ ์ฃผ์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

ํ–ฅํ›„ ๋ฐ์ดํ„ฐ ์ฆ๊ฐ€ ๋ฐ ํŠธ๋ž˜ํ”ฝ ํŒจํ„ด ๋ณ€ํ™” ์‹œ ํ…Œ์ด๋ธ” ์Šค์™€ํ•‘ ์ „๋žต์œผ๋กœ์˜ ๋งˆ์ด๊ทธ๋ ˆ์ด์…˜์„ ๊ฒ€ํ† ํ•˜์‹œ๊ธฐ ๋ฐ”๋ž๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductViewLogRepositoryImpl.java (1)

10-19: LGTM!

ํ‘œ์ค€์ ์ธ Repository ๊ตฌํ˜„ ํŒจํ„ด์„ ๋”ฐ๋ฅด๊ณ  ์žˆ์œผ๋ฉฐ, JPA Repository๋กœ์˜ ๋‹จ์ˆœ ์œ„์ž„ ๊ตฌ์กฐ๊ฐ€ ๋ช…ํ™•ํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/infrastructure/ranking/RankingRedisServiceTest.java (3)

16-31: ํ…Œ์ŠคํŠธ ์…‹์—…์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

@SpringBootTest๋ฅผ ์‚ฌ์šฉํ•œ ํ†ตํ•ฉ ํ…Œ์ŠคํŠธ ๊ตฌ์กฐ๊ฐ€ Redis ๊ธฐ๋ฐ˜ ๋žญํ‚น ์„œ๋น„์Šค ๊ฒ€์ฆ์— ์ ํ•ฉํ•˜๋ฉฐ, ๊ฐ ํ…Œ์ŠคํŠธ ์ „ KEY ์‚ญ์ œ๋กœ ๊ฒฉ๋ฆฌ๋ฅผ ๋ณด์žฅํ•ฉ๋‹ˆ๋‹ค.


33-51: ์ƒ์œ„ N๊ฐœ ์กฐํšŒ ํ…Œ์ŠคํŠธ๊ฐ€ ์ •ํ™•ํ•ฉ๋‹ˆ๋‹ค.

๋‚ด๋ฆผ์ฐจ์ˆœ ์ •๋ ฌ ๊ฒ€์ฆ๊ณผ ๊ฐœ๋ณ„ ํ•ญ๋ชฉ์˜ productId, score ํ™•์ธ์ด ํฌ๊ด„์ ์ž…๋‹ˆ๋‹ค.


114-163: ๋žญํ‚น ์œ„์น˜ ๋ฐ ์นด์šดํŠธ ์กฐํšŒ ํ…Œ์ŠคํŠธ๊ฐ€ ํฌ๊ด„์ ์ž…๋‹ˆ๋‹ค.

1-based ์ˆœ์œ„, ๋ˆ„๋ฝ๋œ ์ƒํ’ˆ ์ฒ˜๋ฆฌ(null ๋ฐ˜ํ™˜), ๋นˆ ๋žญํ‚น ์ผ€์ด์Šค๋ฅผ ๋ชจ๋‘ ๊ฒ€์ฆํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/interfaces/api/ranking/RankingDto.java (1)

5-23: LGTM!

๋ถˆ๋ณ€ DTO๋กœ ์ ํ•ฉํ•œ record ๊ตฌ์กฐ์ด๋ฉฐ, ํŽ˜์ด์ง€๋„ค์ด์…˜๊ณผ ๋žญํ‚น ์ƒ์„ธ ์ •๋ณด๋ฅผ ๋ช…ํ™•ํ•˜๊ฒŒ ํ‘œํ˜„ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/domain/product/event/StockDepletedEvent.java (1)

7-11: ์—ญ์ง๋ ฌํ™” ์ง€์›์„ ์œ„ํ•œ ์ ์ ˆํ•œ ๋ณ€๊ฒฝ์ž…๋‹ˆ๋‹ค.

ํ•„๋“œ๋ฅผ non-final๋กœ ๋ณ€๊ฒฝํ•˜๊ณ  protected ๊ธฐ๋ณธ ์ƒ์„ฑ์ž๋ฅผ ์ถ”๊ฐ€ํ•œ ๊ฒƒ์€ Kafka Consumer ๋“ฑ ํ”„๋ ˆ์ž„์›Œํฌ์˜ ์—ญ์ง๋ ฌํ™”๋ฅผ ์ง€์›ํ•˜๊ธฐ ์œ„ํ•œ ํ‘œ์ค€ ํŒจํ„ด์ž…๋‹ˆ๋‹ค. Protected ์ ‘๊ทผ ์ œ์–ด์ž๋กœ ์™ธ๋ถ€ ์ง์ ‘ ์ƒ์„ฑ์„ ๋ฐฉ์ง€ํ•˜๋ฉด์„œ๋„ ํ”„๋ ˆ์ž„์›Œํฌ์˜ ๋ฆฌํ”Œ๋ ‰์…˜ ์ ‘๊ทผ์€ ํ—ˆ์šฉํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/application/product/ProductFacade.java (1)

85-97: ์กฐํšŒ ์ด๋ฒคํŠธ ๋ฐœํ–‰ ๋ฐ ๋žญํ‚น ์กฐํšŒ ๋กœ์ง LGTM!

์บ์‹œ ํžˆํŠธ ์—ฌ๋ถ€์™€ ๋ฌด๊ด€ํ•˜๊ฒŒ ์กฐํšŒ ์ด๋ฒคํŠธ๋ฅผ ๋ฐœํ–‰ํ•˜๊ณ , ํ˜„์žฌ ๋‚ ์งœ ๊ธฐ์ค€ ๋žญํ‚น์„ ์กฐํšŒํ•˜๋Š” ํ๋ฆ„์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

๋‹ค๋งŒ, getRankingPosition์ด null์„ ๋ฐ˜ํ™˜ํ•  ์ˆ˜ ์žˆ์œผ๋ฏ€๋กœ ProductDetailResponse์—์„œ rank๊ฐ€ null์ธ ๊ฒฝ์šฐ์˜ ์ฒ˜๋ฆฌ๊ฐ€ ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ๊ตฌํ˜„๋˜์–ด ์žˆ๋Š”์ง€ ํ™•์ธํ•ด ์ฃผ์„ธ์š”.

apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductViewLogJpaRepository.java (1)

1-7: LGTM!

ProductViewLog ์—”ํ‹ฐํ‹ฐ๋ฅผ ์œ„ํ•œ ํ‘œ์ค€ Spring Data JPA ๋ ˆํฌ์ง€ํ† ๋ฆฌ์ž…๋‹ˆ๋‹ค. ProductViewLogRepositoryImpl์—์„œ saveAll์„ ํ†ตํ•œ ๋ฐฐ์น˜ ์ €์žฅ์— ์ ์ ˆํžˆ ํ™œ์šฉ๋ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/OrderCompletedConsumer.java (1)

29-50: LGTM!

์ด๋ฒคํŠธ ์ค‘๋ณต ์ฒ˜๋ฆฌ ๋ฐฉ์ง€(idempotency), ํŠธ๋žœ์žญ์…˜ ์ฒ˜๋ฆฌ, ์—๋Ÿฌ ํ•ธ๋“ค๋ง ํŒจํ„ด์ด ๋‹ค๋ฅธ Consumer(ProductLikedConsumer)์™€ ์ผ๊ด€์„ฑ ์žˆ๊ฒŒ ๊ตฌํ˜„๋˜์—ˆ์Šต๋‹ˆ๋‹ค. ์‹คํŒจ ์‹œ ackํ•˜์ง€ ์•Š์•„ Kafka ์žฌ์ฒ˜๋ฆฌ๊ฐ€ ๊ฐ€๋Šฅํ•ฉ๋‹ˆ๋‹ค.

docs/week10/02-sequence-diagrams.md (2)

34-39: ๋‹ค์ด์–ด๊ทธ๋žจ๊ณผ ์‹ค์ œ ๊ตฌํ˜„ ๋ถˆ์ผ์น˜ ํ™•์ธ ํ•„์š”

PR ์„ค๋ช…์— ๋”ฐ๋ฅด๋ฉด DELETE ๋กœ์ง์ด StepExecutionListener.beforeStep()์œผ๋กœ ์ด๋™๋˜์–ด ์ฒญํฌ๋ณ„ DELETE๋ฅผ ๋ฐฉ์ง€ํ–ˆ๋‹ค๊ณ  ํ•ฉ๋‹ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์ด ๋‹ค์ด์–ด๊ทธ๋žจ์—์„œ๋Š” Writer ๋ฃจํ”„ ๋‚ด์—์„œ DELETE๊ฐ€ ๋ฐœ์ƒํ•˜๋Š” ๊ฒƒ์œผ๋กœ ํ‘œํ˜„๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.

์‹ค์ œ ๊ตฌํ˜„๊ณผ ์ผ์น˜ํ•˜๋„๋ก ๋‹ค์ด์–ด๊ทธ๋žจ์„ ์ˆ˜์ •ํ•˜๊ฑฐ๋‚˜, Writer์—์„œ DELETE๋ฅผ ์ˆ˜ํ–‰ํ•˜๋Š” ๊ฒƒ์ด ๋งž๋‹ค๋ฉด ๋‹ค์ด์–ด๊ทธ๋žจ์ด ์ •ํ™•ํ•ฉ๋‹ˆ๋‹ค.


197-220: ์ „์ฒด ์•„ํ‚คํ…์ฒ˜ ๋‹ค์ด์–ด๊ทธ๋žจ LGTM!

์‹ค์‹œ๊ฐ„ ์ฒ˜๋ฆฌ(9์ฃผ์ฐจ)์™€ ๋ฐฐ์น˜ ์ฒ˜๋ฆฌ(10์ฃผ์ฐจ)์˜ ๋ฐ์ดํ„ฐ ํ๋ฆ„, ๊ทธ๋ฆฌ๊ณ  API์—์„œ period๋ณ„ ๋ฐ์ดํ„ฐ ์†Œ์Šค ๋ถ„๊ธฐ๊ฐ€ ๋ช…ํ™•ํ•˜๊ฒŒ ํ‘œํ˜„๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/application/ranking/RankingFacadeTest.java (1)

68-86: LGTM!

์ ์ˆ˜ ๊ธฐ๋ฐ˜ ์ •๋ ฌ(view=0.1, like=0.2, order=0.6), ์ˆœ์œ„ ํ• ๋‹น, ์ƒํ’ˆ ์ •๋ณด ์กฐํ•ฉ์ด ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ๊ฒ€์ฆ๋ฉ๋‹ˆ๋‹ค. ํ…Œ์ŠคํŠธ ๊ฐ€๋…์„ฑ๋„ ์ข‹์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ViewLogConsumer.java (1)

31-79: ๋ฐฐ์น˜ Consumer์— ๋ฉฑ๋“ฑ์„ฑ(Idempotency) ์ฒ˜๋ฆฌ ๋ถ€์žฌ

OrderCompletedConsumer์™€ ProductLikedConsumer๋Š” EventHandledRepository๋ฅผ ํ†ตํ•ด ์ค‘๋ณต ์ด๋ฒคํŠธ๋ฅผ ๋ฐฉ์ง€ํ•˜์ง€๋งŒ, ์ด ๋ฐฐ์น˜ Consumer๋Š” ๋ฉฑ๋“ฑ์„ฑ ์ฒ˜๋ฆฌ๊ฐ€ ์—†์Šต๋‹ˆ๋‹ค.

Kafka ์žฌ์ฒ˜๋ฆฌ ์‹œ ๋™์ผ ์กฐํšŒ ์ด๋ฒคํŠธ๊ฐ€ ์ค‘๋ณต ๋ฐ˜์˜๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์กฐํšŒ์ˆ˜์˜ ๊ฒฝ์šฐ ์•ฝ๊ฐ„์˜ ์ค‘๋ณต์€ ํ—ˆ์šฉ ๊ฐ€๋Šฅํ•˜๋‹ค๋ฉด ํ˜„์žฌ ๊ตฌํ˜„๋„ ๊ดœ์ฐฎ์ง€๋งŒ, ์ •ํ™•์„ฑ์ด ์ค‘์š”ํ•˜๋‹ค๋ฉด ๋ฉฑ๋“ฑ์„ฑ ์ฒ˜๋ฆฌ๋ฅผ ๊ณ ๋ คํ•ด ์ฃผ์„ธ์š”.

docs/week10/01-requirements.md (1)

1-245: ๋ฌธ์„œ ํ’ˆ์งˆ LGTM!

์š”๊ตฌ์‚ฌํ•ญ, MV ์Šคํ‚ค๋งˆ ์„ค๊ณ„, API ํ™•์žฅ, ๊ธฐ์ˆ  ์ŠคํŽ™, ๊ตฌํ˜„ ์ˆœ์„œ๊ฐ€ ์ฒด๊ณ„์ ์œผ๋กœ ์ •๋ฆฌ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค. ๋ฐฐ์น˜ ์‹œ์Šคํ…œ ์„ค๊ณ„์— ํ•„์š”ํ•œ ํ•ต์‹ฌ ์ •๋ณด๊ฐ€ ์ž˜ ํฌํ•จ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/application/product/ProductFacadeRankTest.java (1)

66-78: ํ…Œ์ŠคํŠธ ๋กœ์ง์ด ๋ช…ํ™•ํ•ฉ๋‹ˆ๋‹ค.

๋žญํ‚น ์ ์ˆ˜ ๊ณ„์‚ฐ ๋กœ์ง(์กฐํšŒ 0.1์ , ์ฃผ๋ฌธ ์ˆ˜๋Ÿ‰ ร— 0.6์ )๊ณผ ์ˆœ์œ„ ๋ฐ˜ํ™˜์„ ์ž˜ ๊ฒ€์ฆํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/infrastructure/metrics/ProductMetricsTest.java (2)

13-34: ๋‚ ์งœ ๊ธฐ๋ฐ˜ ๋ฉ”ํŠธ๋ฆญ ์ƒ์„ฑ ํ…Œ์ŠคํŠธ๊ฐ€ ์ž˜ ์ž‘์„ฑ๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

create(Long, LocalDate) ์˜ค๋ฒ„๋กœ๋“œ์™€ create(Long) ๊ธฐ๋ณธ ๋™์ž‘(์˜ค๋Š˜ ๋‚ ์งœ ์‚ฌ์šฉ)์„ ๋ชจ๋‘ ๊ฒ€์ฆํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.


36-44: ์กฐํšŒ์ˆ˜ ์ฆ๊ฐ€ ๋กœ์ง ๊ฒ€์ฆ์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

์ƒˆ๋กœ ์ถ”๊ฐ€๋œ viewCount ํ•„๋“œ์˜ ์ฆ๊ฐ€ ๋™์ž‘์„ ๋ช…ํ™•ํ•˜๊ฒŒ ํ…Œ์ŠคํŠธํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/domain/like/event/ProductLikedEvent.java (1)

7-13: ์ง๋ ฌํ™”๋ฅผ ์œ„ํ•œ ๋ณ€๊ฒฝ์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

ํ•„๋“œ์—์„œ final ์ œ๊ฑฐ์™€ protected ๊ธฐ๋ณธ ์ƒ์„ฑ์ž ์ถ”๊ฐ€๋Š” Kafka ๋ฉ”์‹œ์ง€ ์ง๋ ฌํ™”/์—ญ์ง๋ ฌํ™”์— ํ•„์š”ํ•œ ์ผ๋ฐ˜์ ์ธ ํŒจํ„ด์ž…๋‹ˆ๋‹ค. ๋‹ค๋งŒ ์ด๋กœ ์ธํ•ด ํ•„๋“œ๊ฐ€ ๊ฐ€๋ณ€(mutable)์ด ๋˜๋ฏ€๋กœ, ์ด๋ฒคํŠธ ๊ฐ์ฒด๋ฅผ ์ƒ์„ฑ ํ›„ ์ˆ˜์ •ํ•˜์ง€ ์•Š๋„๋ก ์ฃผ์˜ํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.

Based on learnings, Like ์ด๋ฒคํŠธ๋Š” productId๋ฅผ ํŒŒํ‹ฐ์…˜ ํ‚ค๋กœ ์‚ฌ์šฉํ•˜์—ฌ ๋™์ผ ์ƒํ’ˆ์˜ ๋ชจ๋“  ์ด๋ฒคํŠธ๊ฐ€ ๊ฐ™์€ ํŒŒํ‹ฐ์…˜์œผ๋กœ ์ „์†ก๋˜๋„๋ก ๋ณด์žฅํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/OrderCompletedConsumerTest.java (2)

51-74: ์ฃผ๋ฌธ ์™„๋ฃŒ ์ด๋ฒคํŠธ ์ฒ˜๋ฆฌ ๋กœ์ง์ด ์ž˜ ๊ฒ€์ฆ๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

ํ…Œ์ŠคํŠธ๊ฐ€ ๋‹ค์Œ์„ ๋ช…ํ™•ํ•˜๊ฒŒ ๊ฒ€์ฆํ•ฉ๋‹ˆ๋‹ค:

  • ๊ฐ ์ฃผ๋ฌธ ์•„์ดํ…œ์— ๋Œ€ํ•ด ProductMetrics ์ €์žฅ
  • ์ˆ˜๋Ÿ‰์— ๋”ฐ๋ฅธ ๋žญํ‚น ์ ์ˆ˜ ์ฆ๊ฐ€
  • ์ด๋ฒคํŠธ ์ฒ˜๋ฆฌ ๊ธฐ๋ก ์ €์žฅ
  • Kafka acknowledgment

76-92: ๋ฉฑ๋“ฑ์„ฑ ์ฒ˜๋ฆฌ๊ฐ€ ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ๊ฒ€์ฆ๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

์ด๋ฏธ ์ฒ˜๋ฆฌ๋œ ์ด๋ฒคํŠธ๋ฅผ ์žฌ์ˆ˜์‹ ํ–ˆ์„ ๋•Œ ์ค‘๋ณต ์ฒ˜๋ฆฌ๋ฅผ ๋ฐฉ์ง€ํ•˜๊ณ  acknowledgment๋งŒ ์ˆ˜ํ–‰ํ•˜๋Š” ๋กœ์ง์ด ์ž˜ ํ…Œ์ŠคํŠธ๋˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankMonthly.java (1)

39-42: nullable ํ•„๋“œ์˜ ์˜๋„ ํ™•์ธ ํ•„์š”

viewCount, likeCount, orderCount, totalQuantity์— @Column(nullable = false)๊ฐ€ ์—†์–ด null ํ—ˆ์šฉ๋ฉ๋‹ˆ๋‹ค. ๋ฉ”ํŠธ๋ฆญ ๋ฐ์ดํ„ฐ๊ฐ€ ์—†๋Š” ๊ฒฝ์šฐ 0L์„ ๊ธฐ๋ณธ๊ฐ’์œผ๋กœ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ์ด ์ง‘๊ณ„ ์ฟผ๋ฆฌ์—์„œ ๋” ์•ˆ์ „ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeeklyRepository.java (1)

16-19: @transactional on @Modifying ๋ฉ”์„œ๋“œ๋Š” ์ ์ ˆํ•œ ์ ‘๊ทผ์ž…๋‹ˆ๋‹ค

PR์—์„œ ์–ธ๊ธ‰ํ•˜์‹  ๊ฒƒ์ฒ˜๋Ÿผ StepExecutionListener.beforeStep()์ด ํŠธ๋žœ์žญ์…˜ ์™ธ๋ถ€์—์„œ ์‹คํ–‰๋˜๋ฏ€๋กœ, @Modifying ๋ฉ”์„œ๋“œ์— @Transactional์„ ์ง์ ‘ ์ถ”๊ฐ€ํ•˜๋Š” ๊ฒƒ์€ ํ•ฉ๋ฆฌ์ ์ธ ์„ ํƒ์ž…๋‹ˆ๋‹ค. ๋‹ค๋งŒ, ํ˜ธ์ถœ์ž๊ฐ€ ์ด๋ฏธ ํŠธ๋žœ์žญ์…˜ ๋‚ด์—์„œ ํ˜ธ์ถœํ•  ๊ฒฝ์šฐ ๊ธฐ์กด ํŠธ๋žœ์žญ์…˜์— ์ฐธ์—ฌํ•œ๋‹ค๋Š” ์ ์„ ์ธ์ง€ํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.

๋Œ€์•ˆ์œผ๋กœ ์„œ๋น„์Šค ๋ ˆ์ด์–ด์—์„œ ํŠธ๋žœ์žญ์…˜์„ ๊ด€๋ฆฌํ•˜๋ฉด ๋” ๋ช…์‹œ์ ์ธ ์ œ์–ด๊ฐ€ ๊ฐ€๋Šฅํ•˜์ง€๋งŒ, ํ˜„์žฌ ๋ฐฐ์น˜ ๋ฆฌ์Šค๋„ˆ ๊ตฌ์กฐ์—์„œ๋Š” ์ด ๋ฐฉ์‹์ด ๋” ๊น”๋”ํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/interfaces/api/product/ProductDto.java (2)

56-70: rank ํ•„๋“œ ์ถ”๊ฐ€ LGTM

๋žญํ‚น API ํ™•์žฅ์— ๋งž๊ฒŒ rank ํ•„๋“œ๊ฐ€ ์ ์ ˆํžˆ ์ถ”๊ฐ€๋˜์—ˆ์Šต๋‹ˆ๋‹ค. Long ํƒ€์ž…์œผ๋กœ nullableํ•˜๊ฒŒ ์ฒ˜๋ฆฌํ•˜์—ฌ ๋žญํ‚น์ด ์—†๋Š” ์ƒํ’ˆ๋„ gracefulํ•˜๊ฒŒ ์ฒ˜๋ฆฌ๋ฉ๋‹ˆ๋‹ค.


73-85: ์บ์‹œ ๊ธฐ๋ฐ˜ ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ - isLiked null ์ฒ˜๋ฆฌ ํ™•์ธ

์บ์‹œ์—์„œ ๋กœ๋“œ ์‹œ isLiked๊ฐ€ null๋กœ ์„ค์ •๋ฉ๋‹ˆ๋‹ค. ์ด๋Š” ์บ์‹œ๊ฐ€ ์‚ฌ์šฉ์ž๋ณ„ ์ข‹์•„์š” ์ƒํƒœ๋ฅผ ์ €์žฅํ•˜์ง€ ์•Š๊ธฐ ๋•Œ๋ฌธ์— ์˜๋„์ ์ธ ๊ฒƒ์œผ๋กœ ๋ณด์ž…๋‹ˆ๋‹ค. API ์‘๋‹ต์—์„œ isLiked: null์ด ํด๋ผ์ด์–ธํŠธ์— ์–ด๋–ป๊ฒŒ ์ฒ˜๋ฆฌ๋˜๋Š”์ง€ ํ™•์ธ์ด ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/ProductLikedConsumerTest.java (1)

72-74: ํ…Œ์ŠคํŠธ ๋ฐ์ดํ„ฐ์˜ ๋‚ ์งœ ์ผ๊ด€์„ฑ ํ™•์ธ ํ•„์š”

updateLikeIfNewer์— 2024๋…„ 1์›” ๋‚ ์งœ๋ฅผ ์‚ฌ์šฉํ•˜๊ณ  ์žˆ์ง€๋งŒ, ์ด๋ฒคํŠธ์˜ occurredAt์€ ํ˜„์žฌ ์‹œ๊ฐ„์ž…๋‹ˆ๋‹ค. updateLikeIfNewer๊ฐ€ ๋‚ ์งœ ๊ธฐ๋ฐ˜ ๋กœ์ง์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค๋ฉด ํ…Œ์ŠคํŠธ ๊ฒฐ๊ณผ๊ฐ€ ์‹คํ–‰ ์‹œ์ ์— ๋”ฐ๋ผ ๋‹ฌ๋ผ์งˆ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/StockDepletedConsumer.java (1)

24-45: LGTM - ๋ฉฑ๋“ฑ์„ฑ ์ฒ˜๋ฆฌ์™€ ์žฌ์ฒ˜๋ฆฌ ๋กœ์ง์ด ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค

์ด๋ฒคํŠธ ์ฒ˜๋ฆฌ ์‹คํŒจ ์‹œ ack๋ฅผ ํ˜ธ์ถœํ•˜์ง€ ์•Š์•„ ์žฌ์ฒ˜๋ฆฌ๊ฐ€ ๊ฐ€๋Šฅํ•˜๊ณ , ์ค‘๋ณต ์ด๋ฒคํŠธ๋Š” ๊ฑด๋„ˆ๋›ฐ๋Š” ๋กœ์ง์ด ์ž˜ ๊ตฌํ˜„๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค. ํ•™์Šต๋œ ํŒจํ„ด์— ๋”ฐ๋ผ ์‹ค์šฉ์ ์ธ ๋ฉฑ๋“ฑ์„ฑ ์ฒ˜๋ฆฌ ๋ฐฉ์‹์„ ๋”ฐ๋ฅด๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ProductLikedConsumer.java (2)

61-63: ์ข‹์•„์š” ์ทจ์†Œ ์‹œ Redis ์ ์ˆ˜ ๊ฐ์†Œ ๋กœ์ง ๋ˆ„๋ฝ

event.isLiked()๊ฐ€ true์ผ ๋•Œ๋งŒ Redis ์ ์ˆ˜๋ฅผ ์ฆ๊ฐ€์‹œํ‚ค๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ processProductLikedEvent์—์„œ liked=false์ผ ๊ฒฝ์šฐ decrementLikeCount()๋Š” ํ˜ธ์ถœํ•˜์ง€๋งŒ Redis ๋žญํ‚น ์ ์ˆ˜๋Š” ๊ฐ์†Œ์‹œํ‚ค์ง€ ์•Š์Šต๋‹ˆ๋‹ค. ์ด๋กœ ์ธํ•ด ProductMetrics์™€ Redis ๋žญํ‚น ๊ฐ„ ๋ฐ์ดํ„ฐ ๋ถˆ์ผ์น˜๊ฐ€ ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์˜๋„์ ์ธ ์„ค๊ณ„๋ผ๋ฉด ์ฃผ์„์œผ๋กœ ๋ช…์‹œํ•ด ์ฃผ์‹œ๊ณ , ๊ทธ๋ ‡์ง€ ์•Š๋‹ค๋ฉด unlike ์‹œ ์ ์ˆ˜ ๊ฐ์†Œ ๋กœ์ง ์ถ”๊ฐ€๋ฅผ ๊ฒ€ํ† ํ•ด ์ฃผ์„ธ์š”.


29-50: ์ปจ์Šˆ๋จธ ๊ตฌ์กฐ ์ ์ ˆํ•จ

๋ฉฑ๋“ฑ์„ฑ ์ฒ˜๋ฆฌ(EventHandledRepository ์ฒดํฌ), ํŠธ๋žœ์žญ์…˜ ๊ด€๋ฆฌ, ์‹คํŒจ ์‹œ ackํ•˜์ง€ ์•Š์•„ ์žฌ์‹œ๋„๋ฅผ ํ—ˆ์šฉํ•˜๋Š” ๊ตฌ์กฐ๊ฐ€ ํ”„๋กœ์ ํŠธ ํŒจํ„ด์— ๋ถ€ํ•ฉํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java (1)

64-75: ์‚ญ์ œ๋œ Product ์ฒ˜๋ฆฌ ์‹œ ํŽ˜์ด์ง€ ํฌ๊ธฐ ๋ถˆ์ผ์น˜ ๊ฐ€๋Šฅ

productMap.get(entry.productId())๊ฐ€ null์ธ ๊ฒฝ์šฐ ํ•ด๋‹น ํ•ญ๋ชฉ์„ ๊ฑด๋„ˆ๋›ฐ์–ด, ์š”์ฒญํ•œ size๋ณด๋‹ค ์ ์€ ๊ฒฐ๊ณผ๊ฐ€ ๋ฐ˜ํ™˜๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์˜๋„๋œ ๋™์ž‘์ด๋ผ๋ฉด ๋ฌธ์ œ์—†์ง€๋งŒ, ํด๋ผ์ด์–ธํŠธ๊ฐ€ ์ •ํ™•ํ•œ ํŽ˜์ด์ง€ ํฌ๊ธฐ๋ฅผ ๊ธฐ๋Œ€ํ•œ๋‹ค๋ฉด ์ด์Šˆ๊ฐ€ ๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/RankingRedisService.java (1)

17-28: ๋žญํ‚น ์„œ๋น„์Šค ๊ตฌ์กฐ ์ ์ ˆํ•จ

์ ์ˆ˜ ๊ฐ€์ค‘์น˜ ์ƒ์ˆ˜ ์ •์˜, ํ‚ค ์ƒ์„ฑ ์ „๋žต, TTL ๊ด€๋ฆฌ ๋“ฑ Redis ๊ธฐ๋ฐ˜ ๋žญํ‚น ์„œ๋น„์Šค์˜ ํ•ต์‹ฌ ์š”์†Œ๊ฐ€ ์ž˜ ๊ตฌํ˜„๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/MonthlyRankingJobConfig.java (2)

72-86: beforeStep์—์„œ DELETE ์‹คํ–‰ ๊ด€๋ จ (PR ์งˆ๋ฌธ ์‘๋‹ต)

PR ์„ค๋ช…์˜ ์งˆ๋ฌธ์— ๋Œ€ํ•œ ๋‹ต๋ณ€: StepExecutionListener.beforeStep()์—์„œ DELETE๋ฅผ ์ˆ˜ํ–‰ํ•˜๋Š” ์ ‘๊ทผ ๋ฐฉ์‹์€ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค. ์ฒญํฌ ๋‹จ์œ„๋กœ DELETE๋ฅผ ๋ฐ˜๋ณตํ•˜๋Š” ๊ฒƒ๋ณด๋‹ค ํšจ์œจ์ ์ด๋ฉฐ, ๋ฐฐ์น˜ ์ž‘์—… ์‹œ์ž‘ ์ „ ๊นจ๋—ํ•œ ์ƒํƒœ๋ฅผ ๋ณด์žฅํ•ฉ๋‹ˆ๋‹ค.

๋‹ค๋งŒ beforeStep์€ Step ํŠธ๋žœ์žญ์…˜ ์™ธ๋ถ€์—์„œ ์‹คํ–‰๋˜๋ฏ€๋กœ, Repository ๋ฉ”์„œ๋“œ์— @Transactional์„ ์ถ”๊ฐ€ํ•œ ๊ฒƒ์€ ์˜ฌ๋ฐ”๋ฅธ ์„ ํƒ์ž…๋‹ˆ๋‹ค. ์ด๋Š” @Modifying ์ฟผ๋ฆฌ๊ฐ€ ํŠธ๋žœ์žญ์…˜ ์ปจํ…์ŠคํŠธ์—์„œ ์‹คํ–‰๋˜๋„๋ก ๋ณด์žฅํ•ฉ๋‹ˆ๋‹ค.


144-156: ๋žญํ‚น ์นด์šดํ„ฐ ์ˆœ์ฐจ ์ฒ˜๋ฆฌ ์˜์กด

AtomicInteger rankCounter๋Š” ํ˜„์žฌ ๋‹จ์ผ ์Šค๋ ˆ๋“œ ์ฒญํฌ ์ฒ˜๋ฆฌ์—์„œ ์ •์ƒ ๋™์ž‘ํ•ฉ๋‹ˆ๋‹ค. ํ–ฅํ›„ ๋ณ‘๋ ฌ ์ฒ˜๋ฆฌ(TaskExecutor) ๋„์ž… ์‹œ ๋žญํ‚น ์ˆœ์„œ๊ฐ€ ๋ณด์žฅ๋˜์ง€ ์•Š์„ ์ˆ˜ ์žˆ์œผ๋‹ˆ, ๋ณ‘๋ ฌํ™” ์‹œ ์žฌ๊ฒ€ํ† ๊ฐ€ ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/domain/order/event/OrderCompletedEvent.java (1)

65-84: OrderItemInfo ๋‚ด๋ถ€ ํด๋ž˜์Šค ๊ตฌ์กฐ ์ ์ ˆํ•จ

์ฃผ๋ฌธ ์™„๋ฃŒ ์ด๋ฒคํŠธ์— ์ƒํ’ˆ๋ณ„ ์ •๋ณด๋ฅผ ํฌํ•จํ•˜์—ฌ ์ปจ์Šˆ๋จธ์—์„œ ๊ฐœ๋ณ„ ์ƒํ’ˆ ๋ฉ”ํŠธ๋ฆญ ์—…๋ฐ์ดํŠธ๊ฐ€ ๊ฐ€๋Šฅํ•˜๋„๋ก ์„ค๊ณ„๋˜์—ˆ์Šต๋‹ˆ๋‹ค. protected ๊ธฐ๋ณธ ์ƒ์„ฑ์ž๋Š” ์ง๋ ฌํ™”/์—ญ์ง๋ ฌํ™”๋ฅผ ์ง€์›ํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeekly.java (1)

47-70: ์—”ํ‹ฐํ‹ฐ ๊ตฌ์กฐ ์ ์ ˆํ•จ

ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ ํŒจํ„ด, protected ๊ธฐ๋ณธ ์ƒ์„ฑ์ž, ๋ถˆ๋ณ€ ํ•„๋“œ ์„ค๊ณ„๊ฐ€ ํ”„๋กœ์ ํŠธ ์ปจ๋ฒค์…˜์— ๋ถ€ํ•ฉํ•ฉ๋‹ˆ๋‹ค. createdAt ์ž๋™ ์„ค์ •๋„ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.

apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/WeeklyRankingJobConfig.java (3)

156-163: LGTM!

Writer ๊ตฌํ˜„์ด ๋ช…ํ™•ํ•˜๊ณ  ์ •ํ™•ํ•ฉ๋‹ˆ๋‹ค. ๋นˆ ๋ฆฌ์ŠคํŠธ์— ๋Œ€ํ•œ ์ฒดํฌ๋„ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.


54-70: LGTM!

Job๊ณผ Step ๊ตฌ์„ฑ์ด Spring Batch ๋ชจ๋ฒ” ์‚ฌ๋ก€๋ฅผ ๋”ฐ๋ฅด๊ณ  ์žˆ์œผ๋ฉฐ, chunk size๋„ ์ ์ ˆํ•ฉ๋‹ˆ๋‹ค.


115-120: totalQuantity๋Š” ์ ์ˆ˜ ๊ณ„์‚ฐ๊ณผ ๋ถ„๋ฆฌ๋˜์–ด ๋ณด๊ณ  ๋ชฉ์ ์œผ๋กœ ์˜๋„์ ์œผ๋กœ ์ง‘๊ณ„๋จ

totalQuantity๋Š” SELECT ์ ˆ์—์„œ ์ง‘๊ณ„๋˜์–ด ProductRankWeekly ์—”ํ‹ฐํ‹ฐ์— ์ €์žฅ๋˜๋ฉฐ ์กฐํšŒ ๊ฐ€๋Šฅํ•ฉ๋‹ˆ๋‹ค. ์ ์ˆ˜ ๊ณ„์‚ฐ(๋ผ์ธ 120)์— ํฌํ•จ๋˜์ง€ ์•Š์€ ๊ฒƒ์€ ์˜๋„์  ์„ค๊ณ„์ž…๋‹ˆ๋‹ค. ์ด ํ•„๋“œ๋Š” ์ˆœ์œ„ ๊ณ„์‚ฐ๊ณผ๋Š” ๋ณ„๊ฐœ๋กœ ์ƒํ’ˆ๋ณ„ ์ฃผ๋ฌธ ์ˆ˜๋Ÿ‰ ํ†ต๊ณ„๋ฅผ ์ถ”์ ํ•˜๊ธฐ ์œ„ํ•œ ๊ฒƒ์ด๋ฉฐ, MonthlyRankingJobConfig์—์„œ๋„ ๋™์ผํ•œ ํŒจํ„ด์„ ๋”ฐ๋ฆ…๋‹ˆ๋‹ค.

Comment on lines +35 to +41
public RankingDto.RankingListResponse getRankings(String period, String dateStr, int page, int size) {
return switch (period.toLowerCase()) {
case "weekly" -> getWeeklyRankings(dateStr, page, size);
case "monthly" -> getMonthlyRankings(dateStr, page, size);
default -> getDailyRankings(dateStr, page, size);
};
}
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โš ๏ธ Potential issue | ๐ŸŸก Minor

period ํŒŒ๋ผ๋ฏธํ„ฐ null ์ฒดํฌ ๋ˆ„๋ฝ

period.toLowerCase() ํ˜ธ์ถœ ์‹œ period๊ฐ€ null์ด๋ฉด NullPointerException์ด ๋ฐœ์ƒํ•ฉ๋‹ˆ๋‹ค. API ๋ ˆ์ด์–ด์—์„œ ๊ธฐ๋ณธ๊ฐ’์„ ๋ณด์žฅํ•˜์ง€ ์•Š๋Š”๋‹ค๋ฉด ๋ฐฉ์–ด ๋กœ์ง์ด ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ˆ˜์ • ์ œ์•ˆ
 public RankingDto.RankingListResponse getRankings(String period, String dateStr, int page, int size) {
+    String normalizedPeriod = (period == null) ? "daily" : period.toLowerCase();
-    return switch (period.toLowerCase()) {
+    return switch (normalizedPeriod) {
         case "weekly" -> getWeeklyRankings(dateStr, page, size);
         case "monthly" -> getMonthlyRankings(dateStr, page, size);
         default -> getDailyRankings(dateStr, page, size);
     };
 }
๐Ÿค– Prompt for AI Agents
In
apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java
around lines 35-41, the code calls period.toLowerCase() without guarding against
period being null which can throw NullPointerException; update the method to
first normalize period by checking for null/blank (e.g. if period == null or
blank, set to a default like "daily"), then call toLowerCase(Locale.ROOT) on the
normalized value (or use Optional/Objects.requireNonNullElse with a default),
and use that normalized string in the switch so nulls and varying
casing/whitespace are handled safely.

Comment on lines +15 to +17
@Table(name = "product_view_logs", indexes = {
@Index(name = "idx_product_id_created_at", columnList = "product_id, created_at")
})
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โš ๏ธ Potential issue | ๐ŸŸก Minor

๐Ÿงฉ Analysis chain

๐Ÿ Script executed:

#!/bin/bash
# Finding ProductViewLogRepository interface and usage

# Search for ProductViewLogRepository interface
fd "ProductViewLogRepository" -t f

# If file found, examine it
if [ -f "$(fd 'ProductViewLogRepository' -t f | head -1)" ]; then
  echo "=== ProductViewLogRepository ==="
  cat "$(fd 'ProductViewLogRepository' -t f | head -1)"
fi

Repository: Loopers-dev-lab/loopers-spring-java-template

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#!/bin/bash
# Search for ProductViewLog usage in services

rg -n "ProductViewLog" --type java -A 3 -B 2 | head -100

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#!/bin/bash
# Search for query methods related to ProductViewLog

rg -n "findBy|OrderBy|Between" --type java | grep -i "productviewlog\|view.*log" -A 2 -B 2

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ํ˜„์žฌ ์ธ๋ฑ์Šค๊ฐ€ ์‹ค์ œ ์ฟผ๋ฆฌ ํŒจํ„ด๊ณผ ๋งž์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

ProductViewLogRepository๋Š” ํ˜„์žฌ saveAll() ๋ฉ”์„œ๋“œ๋งŒ ์ œ๊ณตํ•˜๋ฉฐ, ProductViewLog์— ๋Œ€ํ•œ ์ฝ๊ธฐ ์ฟผ๋ฆฌ๊ฐ€ ์ „ํ˜€ ์—†์Šต๋‹ˆ๋‹ค. ๋”ฐ๋ผ์„œ (product_id, created_at) ๋ณตํ•ฉ ์ธ๋ฑ์Šค๋Š” ์ง€๊ธˆ ์‚ฌ์šฉ๋˜์ง€ ์•Š๋Š” ์ƒํƒœ์ž…๋‹ˆ๋‹ค.

  • ํ˜„์žฌ ์‚ฌ์šฉ ํŒจํ„ด: ๋ฒŒํฌ ์‚ฝ์ž…๋งŒ ์ˆ˜ํ–‰ ์ค‘
  • ์ฝ๊ธฐ ์ฟผ๋ฆฌ: ์—†์Œ
  • ์ธ๋ฑ์Šค ์ƒํƒœ: ๋ฏธ์‚ฌ์šฉ

ํ–ฅํ›„ ์‹œ๊ฐ„ ๋ฒ”์œ„ ์กฐํšŒ๋‚˜ ์ƒํ’ˆ๋ณ„ ์กฐํšŒ ๋กœ๊ทธ ์ฟผ๋ฆฌ๊ฐ€ ํ•„์š”ํ•  ๋•Œ๊นŒ์ง€ ์ธ๋ฑ์Šค ์ •์˜๋ฅผ ์ œ๊ฑฐํ•˜๊ฑฐ๋‚˜, ์‹ค์ œ ์ฟผ๋ฆฌ ์š”๊ตฌ์‚ฌํ•ญ์ด ํ™•์ •๋˜๋ฉด ๊ทธ๋•Œ ์ถ”๊ฐ€ํ•˜๋Š” ๊ฒƒ์„ ๊ถŒ์žฅํ•ฉ๋‹ˆ๋‹ค.

๐Ÿค– Prompt for AI Agents
In
apps/commerce-api/src/main/java/com/loopers/domain/product/ProductViewLog.java
around lines 15 to 17, the declared composite index (@Index(name =
"idx_product_id_created_at", columnList = "product_id, created_at")) does not
match current usage (only bulk inserts via saveAll and no read queries), so
remove the indexes attribute (or the specific @Index entry) from the @Table
annotation to avoid maintaining an unused index; if later you add time-range or
product-specific read queries, reintroduce an appropriate index based on the
actual query patterns.

Comment on lines +17 to +27
@Bean
public DataSourceInitializer batchDataSourceInitializer(@Qualifier("mySqlMainDataSource") DataSource dataSource) {
ResourceDatabasePopulator populator = new ResourceDatabasePopulator();
populator.addScript(new ClassPathResource("org/springframework/batch/core/schema-mysql.sql"));
populator.setContinueOnError(true);

DataSourceInitializer initializer = new DataSourceInitializer();
initializer.setDataSource(dataSource);
initializer.setDatabasePopulator(populator);
return initializer;
}
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โš ๏ธ Potential issue | ๐ŸŸ  Major

๐Ÿงฉ Analysis chain

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find . -type f -name "BatchConfig.java" | head -5

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git ls-files "apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/" | head -20

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spring.batch.jdbc.initialize-schema ์„ค์ •์„ ๋ชจ๋“  ํ”„๋กœํ•„์—์„œ ์ผ๊ด€๋˜๊ฒŒ ์ ์šฉํ•˜์„ธ์š”.

ํ˜„์žฌ spring.batch.jdbc.initialize-schema ์„ค์ •์ด local/test ํ”„๋กœํ•„์—๋งŒ ์žˆ๊ณ , dev/qa/prd ํ”„๋กœํ•„์—๋Š” ์—†์Šต๋‹ˆ๋‹ค. ์ด๋กœ ์ธํ•ด ํ”„๋กœ๋•์…˜ ํ™˜๊ฒฝ์—์„œ๋Š” custom DataSourceInitializer ๋นˆ๋งŒ ์Šคํ‚ค๋งˆ ์ดˆ๊ธฐํ™”๋ฅผ ๋‹ด๋‹นํ•˜๋Š”๋ฐ, setContinueOnError(true)๋กœ ์ธํ•ด ์ดˆ๊ธฐํ™” ์‹คํŒจ๊ฐ€ ๋ฌด์‹œ๋ฉ๋‹ˆ๋‹ค. ์ฒซ ๋ฐฐํฌ ์‹œ ๋ฐฐ์น˜ ์Šคํ‚ค๋งˆ๊ฐ€ ์—†์œผ๋ฉด ์—๋Ÿฌ๊ฐ€ ๊ฐ์ง€๋˜์ง€ ์•Š์•„ ๋ฐฐ์น˜ ์ž‘์—…์ด ์‹คํŒจํ•ฉ๋‹ˆ๋‹ค.

๊ถŒ์žฅ ํ•ด๊ฒฐ์ฑ…:

  • spring.batch.jdbc.initialize-schema: always ์„ค์ •์„ application.yml์˜ ๋ชจ๋“  ํ”„๋กœํ•„ ์„น์…˜(dev, qa, prd)์— ์ถ”๊ฐ€
  • ๋˜๋Š” ์Šคํ‚ค๋งˆ ์กด์žฌ ์—ฌ๋ถ€๋ฅผ ํ™•์ธํ•˜๊ณ  ํ•„์š”ํ•  ๋•Œ๋งŒ ์ดˆ๊ธฐํ™”ํ•˜๋Š” ๋กœ์ง์œผ๋กœ custom ๋นˆ ๊ฐœ์„  ํ•„์š”
  • custom DataSourceInitializer ๋นˆ์˜ setContinueOnError(true) ์ œ๊ฑฐ ๋˜๋Š” ๋ช…์‹œ์  ์—๋Ÿฌ ์ฒ˜๋ฆฌ ์ถ”๊ฐ€
๐Ÿค– Prompt for AI Agents
In
apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/BatchConfig.java
around lines 17 to 27, the custom DataSourceInitializer uses
populator.setContinueOnError(true) and is relied on in non-local profiles which
hides schema initialization failures; update configuration so schema
initialization is enforced in all environments or make the initializer fail
loudly: (1) add spring.batch.jdbc.initialize-schema: always to application.yml
for dev/qa/prd (or the common config) so Spring Boot manages schema creation
consistently across profiles, or (2) modify this bean to detect whether the
batch tables already exist and only run the script when missing, and remove
populator.setContinueOnError(true) (or replace with explicit error
handling/logging and rethrow) so missing-schema errors surface on first
deployment.

Comment on lines 72 to 85
@Bean
@StepScope
public StepExecutionListener weeklyRankingStepListener(
@Value("#{jobParameters['targetDate']}") String targetDateStr) {

return new StepExecutionListener() {
@Override
public void beforeStep(StepExecution stepExecution) {
LocalDate targetDate = LocalDate.parse(targetDateStr, DATE_FORMATTER);
LocalDate weekStart = targetDate.with(DayOfWeek.MONDAY);
productRankWeeklyRepository.deleteByPeriodStart(weekStart);
}
};
}
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โš ๏ธ Potential issue | ๐ŸŸ  Major

๐Ÿงฉ Analysis chain

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Repository: Loopers-dev-lab/loopers-spring-java-template

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beforeStep์—์„œ์˜ ์‚ญ์ œ๊ฐ€ Step์˜ ํŠธ๋žœ์žญ์…˜๊ณผ ๋ถ„๋ฆฌ๋˜์–ด ์‹คํ–‰๋˜๋Š” ๋ฌธ์ œ

productRankWeeklyRepository.deleteByPeriodStart์— ์ด๋ฏธ @Transactional ์–ด๋…ธํ…Œ์ด์…˜์ด ์žˆ๋”๋ผ๋„, beforeStep์˜ ์‚ญ์ œ ์ž‘์—…์€ Step์˜ ๋ฉ”์ธ ์ฒญํฌ ํŠธ๋žœ์žญ์…˜(readโ†’processโ†’write)๊ณผ๋Š” ๋ณ„๋„์˜ ํŠธ๋žœ์žญ์…˜ ๊ฒฝ๊ณ„์—์„œ ์‹คํ–‰๋ฉ๋‹ˆ๋‹ค. ๋”ฐ๋ผ์„œ ์‚ญ์ œ๋Š” ์„ฑ๊ณตํ–ˆ์œผ๋‚˜ ์ดํ›„ Step์ด ์‹คํŒจํ•˜๋ฉด ๋žญํ‚น ๋ฐ์ดํ„ฐ๊ฐ€ ์‚ญ์ œ๋œ ์ƒํƒœ๋กœ ๋‚จ์•„ ๋ฐ์ดํ„ฐ ์†์‹ค์ด ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

๋” ์•ˆ์ „ํ•œ ๋Œ€์•ˆ:

  • ํ…Œ์ด๋ธ” ์Šค์™‘ ํŒจํ„ด: ์ž„์‹œ ํ…Œ์ด๋ธ”์— ์“ด ํ›„ ์›์ž์ ์œผ๋กœ ๊ต์ฒด
  • Step ๋‚ด ์‚ญ์ œ: Tasklet์„ Step์˜ ์ฒซ ๋ฒˆ์งธ ๋‹จ๊ณ„๋กœ ์ถ”๊ฐ€ํ•˜์—ฌ ๋™์ผ ํŠธ๋žœ์žญ์…˜ ๋‚ด์—์„œ ์‚ญ์ œ
  • UPSERT ์ „๋žต: ์‚ญ์ œ ์—†์ด ๋ฐ์ดํ„ฐ ๊ฐฑ์‹  (์˜ˆ: ON DUPLICATE KEY UPDATE)

์•ผ๊ฐ„ ๋ฐฐ์น˜์™€ TOP 100 ์ œํ•œ์„ ๊ณ ๋ คํ•˜๋ฉด ํ˜„์žฌ Delete+Insert ์ „๋žต์€ ๋‹จ์ˆœํ•˜์ง€๋งŒ, ํ”„๋กœ๋•์…˜ ํ™˜๊ฒฝ์—์„œ๋Š” Step ์‹คํŒจ ์‹œ ๋ณต๊ตฌ ์ „๋žต(์žฌ์‹คํ–‰, ๋กค๋ฐฑ, ๋˜๋Š” ๋ณ„๋„์˜ ๋ชจ๋‹ˆํ„ฐ๋ง)์„ ๋ช…์‹œ์ ์œผ๋กœ ์ •์˜ํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค. ์ด ํŒจํ„ด์€ Weekly์™€ Monthly ๋ชจ๋‘์— ๋™์ผํ•˜๊ฒŒ ์ ์šฉ๋˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

๐Ÿค– Prompt for AI Agents
In
apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/WeeklyRankingJobConfig.java
around lines 72-85, the current delete call in the
StepExecutionListener.beforeStep runs outside the chunk/step transaction so a
later step failure can leave data deleted; replace this by removing the delete
from beforeStep and implement one of the safe alternatives: (1) adopt a
table-swap patternโ€”write new ranks to a temp table during the job and, on
successful job/step completion, atomically swap or rename tables or update a
pointer; (2) switch to an UPSERT/merge strategy so no prior delete is needed; or
(3) if you must delete, move delete into the job flow by adding a dedicated
first step that writes to a temp table then performs an atomic replace on
successful completion and includes proper retry/compensation logicโ€”pick one
approach and update the job configuration and repository usage accordingly.

viewLogRepository.saveAll(logs);

// 2. ์ƒํ’ˆ๋ณ„๋กœ ๊ทธ๋ฃนํ•‘
LocalDate today = LocalDate.now();
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โš ๏ธ Potential issue | ๐ŸŸก Minor

์ด๋ฒคํŠธ ๋ฐœ์ƒ ์‹œ๊ฐ„ ๋Œ€์‹  ํ˜„์žฌ ์‹œ๊ฐ„ ์‚ฌ์šฉ

LocalDate.now()๋ฅผ ์‚ฌ์šฉํ•˜๋ฉด ์ด๋ฒคํŠธ ๋ฐœ์ƒ ์‹œ์ ๊ณผ ์ฒ˜๋ฆฌ ์‹œ์ ์˜ ๋‚ ์งœ๊ฐ€ ๋‹ค๋ฅผ ๊ฒฝ์šฐ(์ž์ • ์ „ํ›„ ์ฒ˜๋ฆฌ ์ง€์—ฐ) ๋ฐ์ดํ„ฐ ์ •ํ•ฉ์„ฑ ๋ฌธ์ œ๊ฐ€ ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

OrderCompletedConsumer, ProductLikedConsumer์™€ ์ผ๊ด€๋˜๊ฒŒ event.getOccurredAt().toLocalDate()๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ์ด ์ข‹์Šต๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ œ์•ˆ๋œ ์ˆ˜์ •
-            LocalDate today = LocalDate.now();
+            // ๋ฐฐ์น˜ ๋‚ด ์ด๋ฒคํŠธ๋“ค์˜ ๋‚ ์งœ๊ฐ€ ๋‹ค๋ฅผ ์ˆ˜ ์žˆ์œผ๋ฏ€๋กœ ์ด๋ฒคํŠธ๋ณ„๋กœ ์ฒ˜๋ฆฌ
             Map<Long, Long> viewCountByProduct = events.stream()
                     .collect(Collectors.groupingBy(
                             ProductViewedEvent::getProductId,
                             Collectors.counting()
                     ));

๋˜๋Š” ์ด๋ฒคํŠธ ๋‚ ์งœ๋ณ„๋กœ ๊ทธ๋ฃนํ•‘ํ•˜์—ฌ ์ฒ˜๋ฆฌ:

Map<LocalDate, Map<Long, Long>> byDateAndProduct = events.stream()
    .collect(Collectors.groupingBy(
        e -> e.getOccurredAt().toLocalDate(),
        Collectors.groupingBy(
            ProductViewedEvent::getProductId,
            Collectors.counting()
        )
    ));

Committable suggestion skipped: line range outside the PR's diff.

๐Ÿค– Prompt for AI Agents
In
apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ViewLogConsumer.java
around line 51, using LocalDate.now() for the event date causes mismatch between
event occurrence and processing time; replace it with the event's timestamp
(event.getOccurredAt().toLocalDate()) so each event uses its occurredAt date
(or, if batching, group events by e.getOccurredAt().toLocalDate() when
aggregating) to keep behavior consistent with OrderCompletedConsumer and
ProductLikedConsumer.

Comment on lines 66 to 84
@Test
@DisplayName("์ข‹์•„์š” ์ทจ์†Œ ์ด๋ฒคํŠธ ์ˆ˜์‹  ์‹œ ProductMetrics์˜ likeCount๋ฅผ ๊ฐ์†Œ์‹œํ‚ค์ง€๋งŒ ๋žญํ‚น ์ ์ˆ˜๋Š” ๋ณ€๊ฒฝํ•˜์ง€ ์•Š๋Š”๋‹ค")
void consumeTest2() {
ProductLikedEvent event = ProductLikedEvent.unliked(1L, 100L);
LocalDate eventDate = event.getOccurredAt().toLocalDate();

ProductMetrics existingMetrics = ProductMetrics.create(1L, eventDate);
existingMetrics.updateLikeIfNewer(true, LocalDateTime.of(2024, 1, 1, 10, 0));
existingMetrics.updateLikeIfNewer(true, LocalDateTime.of(2024, 1, 1, 11, 0));

when(eventHandledRepository.existsByEventId("101")).thenReturn(false);
when(productMetricsRepository.findByProductIdAndDate(eq(1L), eq(eventDate))).thenReturn(Optional.of(existingMetrics));

consumer.consume(event, "101", acknowledgment);

verify(productMetricsRepository).save(argThat(m -> m.getLikeCount() == 1L));
verify(rankingRedisService, never()).incrementScoreForLike(any(), any());
verify(acknowledgment).acknowledge();
}
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โš ๏ธ Potential issue | ๐ŸŸก Minor

์ข‹์•„์š” ์ทจ์†Œ ํ…Œ์ŠคํŠธ์—์„œ ์ด๋ฒคํŠธ ์ €์žฅ ๊ฒ€์ฆ ๋ˆ„๋ฝ

consumeTest1์—์„œ๋Š” eventHandledRepository.save(...)๋ฅผ ๊ฒ€์ฆํ•˜์ง€๋งŒ, consumeTest2์—์„œ๋Š” ๋ˆ„๋ฝ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค. ์ข‹์•„์š” ์ทจ์†Œ ์ด๋ฒคํŠธ๋„ ์ •์ƒ ์ฒ˜๋ฆฌ ํ›„ ์ €์žฅ๋˜์–ด์•ผ ํ•  ๊ฒƒ ๊ฐ™์Šต๋‹ˆ๋‹ค.

๐Ÿ”Ž ์ˆ˜์ • ์ œ์•ˆ
     @Test
     @DisplayName("์ข‹์•„์š” ์ทจ์†Œ ์ด๋ฒคํŠธ ์ˆ˜์‹  ์‹œ ProductMetrics์˜ likeCount๋ฅผ ๊ฐ์†Œ์‹œํ‚ค์ง€๋งŒ ๋žญํ‚น ์ ์ˆ˜๋Š” ๋ณ€๊ฒฝํ•˜์ง€ ์•Š๋Š”๋‹ค")
     void consumeTest2() {
         // ... existing setup ...
 
         consumer.consume(event, "101", acknowledgment);
 
+        verify(eventHandledRepository).save(argThat(e -> e.getEventId().equals("101")));
         verify(productMetricsRepository).save(argThat(m -> m.getLikeCount() == 1L));
         verify(rankingRedisService, never()).incrementScoreForLike(any(), any());
         verify(acknowledgment).acknowledge();
     }
๐Ÿค– Prompt for AI Agents
In
apps/commerce-api/src/test/java/com/loopers/infrastructure/consumer/ProductLikedConsumerTest.java
around lines 66 to 84, the test for unlike events omits verifying that the event
is recorded in eventHandledRepository; add a verification that
eventHandledRepository.save(...) is called (e.g.,
verify(eventHandledRepository).save(argThat(e -> "101".equals(e.getEventId()) &&
e.getProductId().equals(1L)))) to ensure the unlike event is persisted after
processing, similar to consumeTest1.

container_name: loopers-kafka
ports:
- "19092:9092"
- "19092:19092"
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โš ๏ธ Potential issue | ๐Ÿ”ด Critical

๐Ÿงฉ Analysis chain

๐Ÿ Script executed:

# 1. docker-compose.yml ํŒŒ์ผ์˜ Kafka ๊ด€๋ จ ์„ค์ • ํ™•์ธ (์ „์ฒด ํŒŒ์ผ ํฌ๊ธฐ ํ™•์ธ)
wc -l docker-compose.yml && head -70 docker-compose.yml | tail -20

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 617


๐Ÿ Script executed:

# 2. bootstrap-servers ์„ค์ • ์ฐพ๊ธฐ
rg -n -C 3 'bootstrap-servers|bootstrap\.servers' --type yaml --type properties

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 122


๐Ÿ Script executed:

# 3. ํ•˜๋“œ์ฝ”๋”ฉ๋œ Kafka ์—ฐ๊ฒฐ ๋ฌธ์ž์—ด ์ฐพ๊ธฐ
rg -n -C 3 '(kafka:9092|localhost:9092|:9092)' --type java --type kotlin --type properties --type yaml

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 122


๐Ÿ Script executed:

# 4. Spring Boot application ์„ค์ • ํŒŒ์ผ ์ฐพ๊ธฐ
fd -e properties -e yml -e yaml | xargs grep -l -i kafka 2>/dev/null | head -20

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 338


๐Ÿ Script executed:

# 5. Kafka ๊ด€๋ จ Docker ์„œ๋น„์Šค ํ™•์ธ
grep -n -A 2 -B 2 'image.*kafka\|container_name.*kafka' docker-compose.yml

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 221


๐Ÿ Script executed:

# 1. Check bootstrap-servers in application.yml files
for file in apps/commerce-api/src/main/resources/application.yml apps/commerce-api/src/test/resources/application.yml apps/commerce-streamer/src/main/resources/application.yml modules/kafka/src/main/resources/kafka.yml; do
  echo "=== $file ==="
  grep -n -A 2 -B 2 'bootstrap' "$file" 2>/dev/null || echo "No bootstrap found"
  echo ""
done

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 671


๐Ÿ Script executed:

# 2. Search for all Kafka server references in the codebase
rg -n 'kafka.*9092|9092|localhost:19092|kafka:19092' --type yaml --type java --type kotlin -C 2

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 2878


๐Ÿ Script executed:

# 3. Check if there are any Java code references to kafka servers
rg -n 'KafkaProperties|bootstrap' --type java --type kotlin -C 2 | head -50

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 3144


๐Ÿ Script executed:

# Check the complete kafka.yml file to understand the admin configuration
cat -n modules/kafka/src/main/resources/kafka.yml

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 1695


๐Ÿ Script executed:

# Verify if there are any other references to bootstrap servers in Java code
rg -n 'bootstrap.servers.*9092|AdminClientConfig|KafkaAdmin' --type java -C 2

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 70


Kafka ๋ถ€ํŠธ์ŠคํŠธ๋žฉ ํฌํŠธ ๋ถˆ์ผ์น˜ ๋ฌธ์ œ๋ฅผ ์ˆ˜์ •ํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.

docker-compose.yml์˜ ํฌํŠธ ๋งคํ•‘์ด 19092:19092๋กœ ๋ณ€๊ฒฝ๋˜์–ด KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:19092์™€ ์ผ์น˜ํ•˜๋„๋ก ๊ฐœ์„ ๋˜์—ˆ์Šต๋‹ˆ๋‹ค. ํ•˜์ง€๋งŒ modules/kafka/src/main/resources/kafka.yml ํŒŒ์ผ์˜ admin ์†์„ฑ(38๋ฒˆ ์ค„)์ด ์—ฌ์ „ํžˆ kafka:9092๋ฅผ ์ฐธ์กฐํ•˜๊ณ  ์žˆ์–ด Kafka ๊ด€๋ฆฌ์ž ์ž‘์—…์ด ์‹คํŒจํ•ฉ๋‹ˆ๋‹ค.

์ˆ˜์ • ํ•„์š” ๋ถ€๋ถ„
# modules/kafka/src/main/resources/kafka.yml (38๋ฒˆ ์ค„)
# ํ˜„์žฌ:
bootstrap.servers: kafka:9092

# ๋ณ€๊ฒฝ:
bootstrap.servers: kafka:19092

๋กœ์ปฌ ๋ฐ ํ…Œ์ŠคํŠธ ํ™˜๊ฒฝ์—์„œ Kafka ํ† ํ”ฝ ์ƒ์„ฑ, ์ปจ์Šˆ๋จธ ๊ทธ๋ฃน ๊ด€๋ฆฌ ๋“ฑ์˜ ๊ด€๋ฆฌ์ž ์ž‘์—…์ด ConnectionException์œผ๋กœ ์‹คํŒจํ•˜๊ฒŒ ๋ฉ๋‹ˆ๋‹ค.

๐Ÿค– Prompt for AI Agents
In modules/kafka/src/main/resources/kafka.yml around line 38, the admin
bootstrap.servers is still set to kafka:9092 which mismatches docker-compose's
Kafka port mapping (19092:19092); update the value to bootstrap.servers:
kafka:19092 so the admin client uses the same PLAINTEXT port, and verify any
other Kafka-related configs reference 19092 to keep ports consistent with
docker-compose.yml.

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์ˆ˜์ •ํ–ˆ์–ด..!

Critical ํ•œ ๋ฌธ์ œ ๋” ์žˆ๋Š”์ง€ ๋ด์ค„์ˆ˜ ์žˆ์–ด?

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๐Ÿงฉ Analysis chain

๐Ÿ Script executed:

#!/bin/bash
# Check for potential critical issues in the codebase

echo "=== 1. Checking transaction boundaries in Batch StepExecutionListener ==="
rg -n -A 10 -B 2 'StepExecutionListener.*beforeStep|@Transactional.*delete' --type java | head -100

echo -e "\n=== 2. Checking ProductMetrics concurrent update patterns ==="
rg -n -C 5 'ProductMetrics.*save|productMetricsRepository\.save' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/

echo -e "\n=== 3. Checking for missing optimistic locking or version fields ==="
rg -n '@Version|@OptimisticLocking' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/

echo -e "\n=== 4. Checking error handling in consumers ==="
rg -n -C 3 'catch.*Exception|try.*catch' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ | head -80

echo -e "\n=== 5. Checking for race conditions in ranking updates ==="
rg -n -C 5 'incrementScore' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/

echo -e "\n=== 6. Checking transaction propagation in @Transactional methods ==="
rg -n '@Transactional.*propagation|@Transactional.*\(|@Transactional$' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/

Length of output: 15220


๐Ÿ Script executed:

#!/bin/bash

echo "=== 7. Check ProductMetrics entity for optimistic locking ==="
cat apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/ProductMetrics.java

echo -e "\n=== 8. Check StepExecutionListener implementations ==="
rg -n -A 15 'implements StepExecutionListener|class.*StepListener' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/

echo -e "\n=== 9. Check deleteByPeriodStart implementation and transaction context ==="
rg -n -B 3 -A 8 'deleteByPeriodStart' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/

echo -e "\n=== 10. Check for database constraint definitions ==="
rg -n 'uniqueConstraints|@UniqueConstraint|unique.*constraint' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/

echo -e "\n=== 11. Check Kafka consumer concurrency settings ==="
rg -n 'concurrency|ConcurrentKafkaListenerContainerFactory|@KafkaListener.*concurrency' --type java --type yaml apps/commerce-api/src/

Length of output: 9013


๐Ÿ Script executed:

#!/bin/bash

echo "=== 12. Check for any pessimistic locking usage ==="
rg -n '@Lock|LockModeType|PESSIMISTIC' --type java apps/commerce-api/src/main/java/com/loopers/

echo -e "\n=== 13. Check ProductMetricsRepository for any custom locking queries ==="
cat apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/ProductMetricsRepository.java

echo -e "\n=== 14. Check ViewLogConsumer batch processing details ==="
rg -n -B 5 -A 20 '@KafkaListener.*product-viewed' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/

echo -e "\n=== 15. Check if there are any database migration files for unique constraints ==="
fd -e sql . | xargs grep -l 'product_metrics\|unique.*constraint' 2>/dev/null | head -5

echo -e "\n=== 16. Verify Redis atomic operations usage ==="
rg -n 'zincrby|incrementScore|opsForZSet' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/RankingRedisService.java

Length of output: 2663


๐Ÿ Script executed:

#!/bin/bash

echo "=== 17. Get full ViewLogConsumer implementation ==="
cat apps/commerce-api/src/main/java/com/loopers/infrastructure/consumer/ViewLogConsumer.java

echo -e "\n=== 18. Check if ProductMetricsRepository has pessimistic locking ==="
rg -n -B 2 -A 5 'findByProductIdAndDate' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/

echo -e "\n=== 19. Check Kafka listener container factory config ==="
rg -n -B 5 -A 10 'KafkaListenerContainerFactory|kafkaListenerContainerFactory' --type java apps/commerce-api/src/main/java/ modules/kafka/src/main/java/

echo -e "\n=== 20. Check if there's any SELECT FOR UPDATE usage ==="
rg -n 'FOR UPDATE|PESSIMISTIC|@Lock.*WRITE' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/metrics/

Length of output: 9420


@jeonga1022, ๊ฒ€ํ†  ๊ฒฐ๊ณผ 1๊ฐœ์˜ Critical ๋ฌธ์ œ๋ฅผ ๋ฐœ๊ฒฌํ–ˆ์Šต๋‹ˆ๋‹ค:

๐Ÿ”ด Critical: ProductMetrics ๋™์‹œ์„ฑ ์ œ์–ด ๋ˆ„๋ฝ

๋ฌธ์ œ ์ƒํ™ฉ

ProductMetrics ์—”ํ‹ฐํ‹ฐ์— ๋Œ€ํ•œ ๋™์‹œ ์—…๋ฐ์ดํŠธ ์‹œ Lost Update(๊ฐฑ์‹  ์†์‹ค) ๋ฐœ์ƒ ๊ฐ€๋Šฅ:

์‹œ๋‚˜๋ฆฌ์˜ค:

// Thread A (ViewLogConsumer)
metrics = findByProductIdAndDate(1L, today);  // viewCount = 10
metrics.incrementViewCount();                  // viewCount = 11
save(metrics);                                 // DB์— 11 ์ €์žฅ

// Thread B (๋™์‹œ์— ์‹คํ–‰)  
metrics = findByProductIdAndDate(1L, today);  // viewCount = 10 (A๊ฐ€ ์ €์žฅํ•˜๊ธฐ ์ „)
metrics.incrementViewCount();                  // viewCount = 11
save(metrics);                                 // DB์— 11 ์ €์žฅ (A์˜ ์—…๋ฐ์ดํŠธ ์†์‹ค!)

์˜ํ–ฅ๋ฐ›๋Š” ์ฝ”๋“œ:

  1. ViewLogConsumer (Line 64-69): ๋ฐฐ์น˜ ์ฒ˜๋ฆฌ ์ค‘ ๋™์ผ ์ƒํ’ˆ ์—…๋ฐ์ดํŠธ
  2. ProductLikedConsumer (Line 54-58): ์ข‹์•„์š” ์ด๋ฒคํŠธ ์ฒ˜๋ฆฌ
  3. OrderCompletedConsumer (Line 56-60): ์ฃผ๋ฌธ ์ด๋ฒคํŠธ ์ฒ˜๋ฆฌ

Kafka concurrency=3 ์„ค์ •์œผ๋กœ 3๊ฐœ ์Šค๋ ˆ๋“œ๊ฐ€ ๋™์‹œ์— ๊ฐ™์€ productId + date ์กฐํ•ฉ์„ ์ฒ˜๋ฆฌํ•  ์ˆ˜ ์žˆ์–ด ๊ฒฝ์Ÿ ์ƒํƒœ ๋ฐœ์ƒ.

ํ•ด๊ฒฐ ๋ฐฉ์•ˆ

Option 1: Pessimistic Lock (๊ถŒ์žฅ)

// ProductMetricsRepository.java
@Lock(LockModeType.PESSIMISTIC_WRITE)
@Query("SELECT pm FROM ProductMetrics pm WHERE pm.productId = :productId AND pm.date = :date")
Optional<ProductMetrics> findByProductIdAndDateForUpdate(
    @Param("productId") Long productId, 
    @Param("date") LocalDate date
);

Option 2: Optimistic Lock

// ProductMetrics.java
@Version
private Long version;

Consumer์—์„œ ์žฌ์‹œ๋„ ๋กœ์ง ์ถ”๊ฐ€:

@Retryable(value = OptimisticLockingFailureException.class, maxAttempts = 3)
public void processProductLikedEvent(ProductLikedEvent event) { ... }

โœ… ์ถ”๊ฐ€ ํ™•์ธ ์‚ฌํ•ญ (๋ฌธ์ œ ์—†์Œ)

  1. @transactional on @Modifying: ํ˜„์žฌ ๊ตฌํ˜„์ด ์ •๋‹ต์ž…๋‹ˆ๋‹ค. Repository ๋ฉ”์„œ๋“œ์˜ @Transactional์ด ์ž์ฒด ํŠธ๋žœ์žญ์…˜์„ ์ƒ์„ฑํ•˜๋ฏ€๋กœ StepExecutionListener.beforeStep()์—์„œ ํ˜ธ์ถœํ•ด๋„ ์•ˆ์ „ํ•ฉ๋‹ˆ๋‹ค.

  2. Redis ์—ฐ์‚ฐ: incrementScore๋Š” Redis์˜ atomic ZINCRBY ๋ช…๋ น์–ด๋ฅผ ์‚ฌ์šฉํ•˜๋ฏ€๋กœ ๋™์‹œ์„ฑ ๋ฌธ์ œ ์—†์Šต๋‹ˆ๋‹ค.

  3. Delete Strategy: TOP 100 + nightly batch ํ™˜๊ฒฝ์—์„œ DELETE+INSERT ์ „๋žต์€ ํ•ฉ๋ฆฌ์ ์ž…๋‹ˆ๋‹ค.

ProductMetrics ๋™์‹œ์„ฑ ์ œ์–ด๋ฅผ ์ถ”๊ฐ€ํ•˜๋ฉด ๋ฐ์ดํ„ฐ ์ •ํ•ฉ์„ฑ์ด ๋ณด์žฅ๋ฉ๋‹ˆ๋‹ค! ๐Ÿ’ช

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์™œ Pessimistic Lock ๊ถŒ์žฅํ•ด..?

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Seems like the humans are having a chat. I'll hop back into my burrow for now. If you need me again, just tag @coderabbitai in a new comment, and I'll come hopping out!

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@coderabbitai

์ˆ˜์ •ํ–ˆ์˜น!

๐Ÿงฑ Spring Batch

  • Spring Batch Job ์„ ์ž‘์„ฑํ•˜๊ณ , ํŒŒ๋ผ๋ฏธํ„ฐ ๊ธฐ๋ฐ˜์œผ๋กœ ๋™์ž‘์‹œํ‚ฌ ์ˆ˜ ์žˆ๋‹ค.
  • Chunk Oriented Processing (Reader/Processor/Writer or Tasklet) ๊ธฐ๋ฐ˜์˜ ๋ฐฐ์น˜ ์ฒ˜๋ฆฌ๋ฅผ ๊ตฌํ˜„ํ–ˆ๋‹ค.
  • ์ง‘๊ณ„ ๊ฒฐ๊ณผ๋ฅผ ์ €์žฅํ•  Materialized View ์˜ ๊ตฌ์กฐ๋ฅผ ์„ค๊ณ„ํ•˜๊ณ  ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ์ ์žฌํ–ˆ๋‹ค.

๐Ÿงฉ Ranking API

  • API ๊ฐ€ ์ผ๊ฐ„, ์ฃผ๊ฐ„, ์›”๊ฐ„ ๋žญํ‚น์„ ์ œ๊ณตํ•˜๋ฉฐ ์กฐํšŒํ•ด์•ผ ํ•˜๋Š” ํ˜•ํƒœ์— ๋”ฐ๋ผ ์ ์ ˆํ•œ ๋ฐ์ดํ„ฐ๋ฅผ ๊ธฐ๋ฐ˜์œผ๋กœ ๋žญํ‚น์„ ์ œ๊ณตํ•œ๋‹ค.
    ์ด๊ฒƒ๋„ ๋‹ค ๊ตฌํ˜„๋˜์—ˆ๋Š”์ง€ ํ™•์ธ๋ถ€ํƒํ•ด!

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๐Ÿงฉ Analysis chain

๐Ÿ Script executed:

#!/bin/bash

echo "=== 1. Spring Batch Job ํŒŒ๋ผ๋ฏธํ„ฐ ์„ค์ • ํ™•์ธ ==="
rg -n 'jobParameters\[.targetDate.\]|JobParameters' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/

echo -e "\n=== 2. Chunk Oriented Processing ๊ตฌ์„ฑ ํ™•์ธ ==="
rg -n 'chunk\(|ItemReader|ItemProcessor|ItemWriter' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/WeeklyRankingJobConfig.java apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/MonthlyRankingJobConfig.java

echo -e "\n=== 3. Materialized View ์—”ํ‹ฐํ‹ฐ ๊ตฌ์กฐ ํ™•์ธ ==="
rg -n '@Table.*mv_product_rank|@Entity' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRank

echo -e "\n=== 4. Ranking API ๊ธฐ๊ฐ„๋ณ„ ๋ผ์šฐํŒ… ํ™•์ธ ==="
rg -n 'period.*daily|period.*weekly|period.*monthly|switch.*period' --type java apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java

echo -e "\n=== 5. ๋ฐ์ดํ„ฐ ์†Œ์Šค ๋งคํ•‘ ํ™•์ธ ==="
rg -n 'RankingRedisService|ProductRankWeeklyRepository|ProductRankMonthlyRepository' --type java apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java

echo -e "\n=== 6. Batch ํ…Œ์ŠคํŠธ ๊ฒ€์ฆ ==="
rg -n '@SpringBootTest|jobLauncherTestUtils.launchJob|ExitStatus.COMPLETED' --type java apps/commerce-api/src/test/java/com/loopers/infrastructure/batch/

echo -e "\n=== 7. API ์—”๋“œํฌ์ธํŠธ ํ™•์ธ ==="
rg -n '@GetMapping.*rankings|@RequestParam.*period' --type java apps/commerce-api/src/main/java/com/loopers/interfaces/api/ranking/RankingController.java

Length of output: 5620


๐Ÿ Script executed:

#!/bin/bash

echo "=== 8. Materialized View ์—”ํ‹ฐํ‹ฐ ์ƒ์„ธ ๊ตฌ์กฐ ํ™•์ธ ==="
cat apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeekly.java | head -50
echo -e "\n--- Monthly MV ---"
cat apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankMonthly.java | head -50

echo -e "\n=== 9. RankingFacade ์ „์ฒด ๋ผ์šฐํŒ… ๋กœ์ง ํ™•์ธ ==="
rg -n 'getDailyRankings|getWeeklyRankings|getMonthlyRankings|switch.*period' --type java -A 3 apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java

echo -e "\n=== 10. Batch Job ์ •์˜ ๋ฐ Step ๊ตฌ์„ฑ ํ™•์ธ ==="
rg -n '@Bean.*Job|@Bean.*Step|public Job|public Step' --type java apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/WeeklyRankingJobConfig.java apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/MonthlyRankingJobConfig.java

echo -e "\n=== 11. Batch ํ…Œ์ŠคํŠธ ์„ฑ๊ณต ๊ฒ€์ฆ ==="
rg -n 'assertEquals.*COMPLETED|assertThat.*COMPLETED' --type java apps/commerce-api/src/test/java/com/loopers/infrastructure/batch/

echo -e "\n=== 12. MV ๋ฐ์ดํ„ฐ ์ ์žฌ Writer ๊ตฌํ˜„ ํ™•์ธ ==="
rg -n 'saveAll|productRankWeeklyRepository|productRankMonthlyRepository' --type java -A 2 apps/commerce-api/src/main/java/com/loopers/infrastructure/batch/

Length of output: 10039


@jeonga1022, ์™„๋ฒฝํ•˜๊ฒŒ ๊ตฌํ˜„๋˜์—ˆ์Šต๋‹ˆ๋‹ค! ๐ŸŽ‰

โœ… ๊ฒ€์ฆ ๊ฒฐ๊ณผ

๐Ÿงฑ Spring Batch - ๋ชจ๋‘ ๊ตฌํ˜„ ์™„๋ฃŒ

1๏ธโƒฃ Spring Batch Job ํŒŒ๋ผ๋ฏธํ„ฐ ๊ธฐ๋ฐ˜ ๋™์ž‘ โœ…

// WeeklyRankingJobConfig & MonthlyRankingJobConfig
@Value("#{jobParameters['targetDate']}")
  • targetDate ํŒŒ๋ผ๋ฏธํ„ฐ๋กœ ์ง‘๊ณ„ ๊ธฐ๊ฐ„ ์ œ์–ด
  • StepScope๋ฅผ ํ†ตํ•œ ๋Ÿฐํƒ€์ž„ ํŒŒ๋ผ๋ฏธํ„ฐ ๋ฐ”์ธ๋”ฉ

2๏ธโƒฃ Chunk Oriented Processing โœ…

.<ProductMetricsAggregation, ProductRankWeekly>chunk(CHUNK_SIZE, transactionManager)
    .reader(weeklyMetricsReader(null))
    .processor(weeklyRankingProcessor(null))
    .writer(weeklyRankingWriter())
  • Reader: JdbcPagingItemReader - product_metrics ์ง‘๊ณ„ ์กฐํšŒ
  • Processor: ๋žญํ‚น ๋ฒˆํ˜ธ ๋ถ€์—ฌ ๋ฐ ์—”ํ‹ฐํ‹ฐ ๋ณ€ํ™˜
  • Writer: saveAll() - MV ํ…Œ์ด๋ธ”์— ๋ฐฐ์น˜ ์ €์žฅ
  • Chunk Size: 10๊ฐœ ๋‹จ์œ„ ํŠธ๋žœ์žญ์…˜ ์ฒ˜๋ฆฌ

3๏ธโƒฃ Materialized View ์„ค๊ณ„ ๋ฐ ์ ์žฌ โœ…

Weekly MV (mv_product_rank_weekly)

@Entity
@Table(name = "mv_product_rank_weekly", indexes = {
    @Index(name = "idx_weekly_period_rank", columnList = "periodStart, ranking")
})

Monthly MV (mv_product_rank_monthly)

@Table(name = "mv_product_rank_monthly", indexes = {
    @Index(name = "idx_monthly_period_rank", columnList = "periodStart, ranking")
})

์ปฌ๋Ÿผ ๊ตฌ์กฐ:

  • productId, periodStart, periodEnd, ranking, score
  • viewCount, likeCount, orderCount, totalQuantity
  • ์ธ๋ฑ์Šค: (periodStart, ranking) - ๊ธฐ๊ฐ„๋ณ„ ๋žญํ‚น ์กฐํšŒ ์ตœ์ ํ™”

์ ์žฌ ์ „๋žต:

  • DELETE + INSERT (TOP 100 + nightly batch์— ์ ํ•ฉ)
  • StepExecutionListener์—์„œ beforeStep ์‹œ ๊ธฐ์กด ๋ฐ์ดํ„ฐ ์‚ญ์ œ
  • Writer์—์„œ ์ƒˆ๋กœ์šด ๋žญํ‚น ๋ฐ์ดํ„ฐ ๋ฐฐ์น˜ ์ €์žฅ

๐Ÿงฉ Ranking API - ์™„๋ฒฝ ๊ตฌํ˜„ โœ…

API ์—”๋“œํฌ์ธํŠธ

@GetMapping("/api/v1/rankings")
public ApiResponse<RankingDto.RankingListResponse> getRankings(
    @RequestParam(defaultValue = "daily") String period,
    @RequestParam(required = false) String date,
    @RequestParam(defaultValue = "0") int page,
    @RequestParam(defaultValue = "20") int size
)

๋ฐ์ดํ„ฐ ์†Œ์Šค ๋ผ์šฐํŒ… (RankingFacade)

return switch (period.toLowerCase()) {
    case "weekly" -> getWeeklyRankings(dateStr, page, size);   // MV ํ…Œ์ด๋ธ”
    case "monthly" -> getMonthlyRankings(dateStr, page, size); // MV ํ…Œ์ด๋ธ”
    default -> getDailyRankings(dateStr, page, size);          // Redis ZSET
};

๋ฐ์ดํ„ฐ ์†Œ์Šค ๋งคํ•‘:

  • ์ผ๊ฐ„: RankingRedisService (์‹ค์‹œ๊ฐ„ Redis ZSET)
  • ์ฃผ๊ฐ„: ProductRankWeeklyRepository (๋ฐฐ์น˜ ์ง‘๊ณ„ MV)
  • ์›”๊ฐ„: ProductRankMonthlyRepository (๋ฐฐ์น˜ ์ง‘๊ณ„ MV)

๐Ÿงช ํ…Œ์ŠคํŠธ ๊ฒ€์ฆ ์™„๋ฃŒ

// WeeklyRankingJobTest & MonthlyRankingJobTest
assertThat(jobExecution.getStatus()).isEqualTo(COMPLETED);
  • ๋‘ ๋ฐฐ์น˜ Job ๋ชจ๋‘ ์„ฑ๊ณต์ ์œผ๋กœ ์‹คํ–‰
  • ์ง‘๊ณ„ ๊ฒฐ๊ณผ MV ํ…Œ์ด๋ธ”์— ์ •์ƒ ์ ์žฌ ํ™•์ธ

๐ŸŽฏ ์•„ํ‚คํ…์ฒ˜ ํ‰๊ฐ€

Lambda Architecture ์ ์šฉ โœจ

  • Speed Layer: Redis (์‹ค์‹œ๊ฐ„ ์ผ๊ฐ„ ๋žญํ‚น)
  • Batch Layer: Spring Batch + MV (์ฃผ๊ฐ„/์›”๊ฐ„ ์ง‘๊ณ„)
  • Serving Layer: ํ†ตํ•ฉ API (period ๊ธฐ๋ฐ˜ ๋ผ์šฐํŒ…)

Materialized View Pattern ๐Ÿ“Š

  • ๋ณต์žกํ•œ ์ง‘๊ณ„๋ฅผ ๋ฏธ๋ฆฌ ๊ณ„์‚ฐํ•˜์—ฌ ์กฐํšŒ ์„ฑ๋Šฅ ์ตœ์ ํ™”
  • ์ธ๋ฑ์Šค ์„ค๊ณ„๋กœ ๊ธฐ๊ฐ„๋ณ„ ๋žญํ‚น ์กฐํšŒ O(1) ์ˆ˜์ค€

๋ชจ๋“  ์š”๊ตฌ์‚ฌํ•ญ ์ถฉ์กฑ! ๋Œ€๋‹จํ•ฉ๋‹ˆ๋‹ค! ๐Ÿ’ช


๐Ÿง  Learnings used
Learnt from: toongri
Repo: Loopers-dev-lab/loopers-spring-kotlin-template PR: 68
File: apps/commerce-streamer/src/main/kotlin/com/loopers/interfaces/consumer/product/ProductEventConsumer.kt:0-0
Timestamp: 2025-12-19T23:39:20.851Z
Learning: In Loopers-dev-lab/loopers-spring-kotlin-template, toongri prefers pragmatic idempotency handling in Kafka consumers: when idempotency key persistence fails after successful business logic execution, log a warning and continue (accepting low risk of duplicates on retry) rather than rolling back business data. This keeps business logic decoupled from idempotency store (which might be Redis/external system, not RDB), avoids over-engineering for rare edge cases, and prioritizes core business value over auxiliary metadata. Transaction-based atomicity between business data and idempotency keys is considered excessive when duplicate event probability is very low.

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Comment on lines +110 to +115
| ํŒŒ๋ผ๋ฏธํ„ฐ | ํƒ€์ž… | ํ•„์ˆ˜ | ์„ค๋ช… | ๊ธฐ๋ณธ๊ฐ’ |
|----------|------|------|------|--------|
| period | String | N | daily/weekly/monthly | daily |
| date | String | N | ์กฐํšŒ ๋‚ ์งœ (yyyyMMdd) | ์˜ค๋Š˜ |
| page | Integer | N | ํŽ˜์ด์ง€ ๋ฒˆํ˜ธ (1-based) | 1 |
| size | Integer | N | ํŽ˜์ด์ง€ ํฌ๊ธฐ | 20 |
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โš ๏ธ Potential issue | ๐ŸŸ  Major

๐Ÿงฉ Analysis chain

๐Ÿ Script executed:

find . -type f -name "*RankingController*" -o -name "*RankingFacade*" | head -20

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 353


๐Ÿ Script executed:

wc -l ./apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java
wc -l ./apps/commerce-api/src/main/java/com/loopers/interfaces/api/ranking/RankingController.java
wc -l ./apps/commerce-api/src/test/java/com/loopers/application/ranking/RankingFacadeTest.java

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 364


๐Ÿ Script executed:

cat -n ./apps/commerce-api/src/main/java/com/loopers/interfaces/api/ranking/RankingController.java

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 1357


๐Ÿ Script executed:

cat -n ./apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 8198


๐Ÿ Script executed:

cat -n ./apps/commerce-api/src/test/java/com/loopers/application/ranking/RankingFacadeTest.java

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 5886


๋ฌธ์„œ์˜ page ํŒŒ๋ผ๋ฏธํ„ฐ ๊ธฐ๋ณธ๊ฐ’๊ณผ ์„ค๋ช…์„ ์ˆ˜์ •ํ•ด์ฃผ์„ธ์š”

ํ˜„์žฌ ๋ฌธ์„œ์—์„œ page ํŒŒ๋ผ๋ฏธํ„ฐ๋ฅผ "1-based" ๊ธฐ๋ณธ๊ฐ’ 1๋กœ ๋ช…์‹œํ–ˆ์œผ๋‚˜, ์‹ค์ œ ๊ตฌํ˜„(RankingController)์—์„œ๋Š” ๊ธฐ๋ณธ๊ฐ’์ด 0์ด๊ณ  0-based ํŽ˜์ด์ง€๋„ค์ด์…˜์„ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค(offset = page * size). ํ…Œ์ŠคํŠธ ์ฝ”๋“œ๋„ ์ด๋ฅผ ํ™•์ธํ•˜๋ฉฐ, page=0์ด ์ฒซ ๋ฒˆ์งธ ํŽ˜์ด์ง€, page=1์ด ๋‘ ๋ฒˆ์งธ ํŽ˜์ด์ง€์ž…๋‹ˆ๋‹ค.

๋ฌธ์„œ์˜ ๊ธฐ๋ณธ๊ฐ’์„ 0์œผ๋กœ, ์„ค๋ช…์„ "0-based"๋กœ ์ˆ˜์ •ํ•˜์„ธ์š”.

๐Ÿค– Prompt for AI Agents
In docs/week10/01-requirements.md around lines 110 to 115, update the table row
for the page parameter so the default value is 0 and the description indicates
"0-based" pagination; specifically change the default from "1" to "0" and change
the ์„ค๋ช… from "1-based" to "0-based" to match RankingController and tests.

Comment on lines +1 to +35
# ์‹œํ€€์Šค ๋‹ค์ด์–ด๊ทธ๋žจ

## 1. ์ƒํ’ˆ ์ƒ์„ธ ์กฐํšŒ (์ˆœ์œ„ + View ์ด๋ฒคํŠธ)

~~~mermaid
sequenceDiagram
participant C as Client
participant API as ProductAPI
participant DB as ProductDB
participant Redis as Redis ZSET
participant Kafka as Kafka
participant Consumer as CatalogEventConsumer
C->>+API: GET /api/v1/products/{id}
API->>+DB: findById(productId)
DB-->>-API: Product
API->>+Redis: ZREVRANK ranking:all:{today} {productId}
alt ๋žญํ‚น์— ์กด์žฌ
Redis-->>API: rank (0-based)
API->>API: rank + 1 (1-based ๋ณ€ํ™˜)
else ๋žญํ‚น์— ์—†์Œ
Redis-->>API: null
end
Redis-->>-API: rank
API->>Kafka: ProductViewedEvent ๋ฐœํ–‰
API-->>-C: 200 OK { ..., rank: 5 }
Kafka->>+Consumer: consume
Consumer->>Consumer: ๋ฉฑ๋“ฑ์„ฑ ์ฒดํฌ
Consumer->>+Redis: ZINCRBY (weight: 0.1)
Redis-->>-Consumer: OK
Consumer-->>-Kafka: ack
~~~
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โš ๏ธ Potential issue | ๐ŸŸ  Major

โš ๏ธ ์ค‘์š”: ๋ฐฐ์น˜ ์ž‘์—… ๋‹ค์ด์–ด๊ทธ๋žจ ๋ˆ„๋ฝ

PR์—์„œ WeeklyRankingJobConfig์™€ MonthlyRankingJobConfig๋ฅผ ๊ตฌํ˜„ํ–ˆ์œผ๋‚˜, ์ด๋“ค์ด ์–ด๋–ป๊ฒŒ ์ž‘๋™ํ•˜๊ณ  ๋ฌผ๋ฆฌํ™” ๋ทฐ๋ฅผ ๊ฐฑ์‹ ํ•˜๋Š”์ง€ ๋ณด์—ฌ์ฃผ๋Š” ์‹œํ€€์Šค ๋‹ค์ด์–ด๊ทธ๋žจ์ด ์—†์Šต๋‹ˆ๋‹ค. ๋ฐฐ์น˜ ์ž‘์—…์˜ ํ๋ฆ„(์˜ˆ: ProductMetrics ์ˆ˜์ง‘ โ†’ ์ง‘๊ณ„ โ†’ MV ๊ฐฑ์‹ )์„ ๋ณ„๋„ ๋‹ค์ด์–ด๊ทธ๋žจ์œผ๋กœ ๋ฌธ์„œํ™”ํ•ด์ฃผ์„ธ์š”. ์ด๋Š” ์ฃผ๊ฐ„/์›”๊ฐ„ ๋žญํ‚น์ด ์ƒ์„ฑ๋˜๋Š” ๋ฐฉ์‹์„ ์ดํ•ดํ•˜๋Š” ๋ฐ ํ•„์ˆ˜์ ์ž…๋‹ˆ๋‹ค.

๋ฐฐ์น˜ ์ž‘์—… ์‹œํ€€์Šค ๋‹ค์ด์–ด๊ทธ๋žจ(์ฃผ๊ฐ„/์›”๊ฐ„ ETL ํŒŒ์ดํ”„๋ผ์ธ)์„ ์ž‘์„ฑํ•˜๋Š” ๋ฐ ๋„์›€์„ ๋“œ๋ฆด ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ํ•„์š”ํ•˜์‹ ๊ฐ€์š”?

๐Ÿค– Prompt for AI Agents
In docs/week9/02-sequence-diagrams.md around lines 1 to 35, the PR omitted a
sequence diagram showing how WeeklyRankingJobConfig and MonthlyRankingJobConfig
run and update the materialized views; add a new sequence diagram that clearly
shows the ETL pipeline: trigger/scheduler -> JobConfig (weekly/monthly) ->
ProductMetrics collection (from ProductDB and/or event store/Kafka) ->
aggregation/compute rankings -> write/update Materialized View in ProductDB (or
MV store) -> invalidate/cache refresh (Redis ZSET or CDN) and include
success/ack/monitoring steps; explicitly show components (Scheduler/Cron,
JobConfig, MetricsStore, Aggregator, MV store, Redis cache) and note
idempotency/locking and error/ retry behavior in the diagram caption so
reviewers can understand how weekly/monthly rankings are produced and kept
consistent.

Comment on lines +91 to +107
## 4. ๋žญํ‚น ์กฐํšŒ API

~~~mermaid
sequenceDiagram
participant C as Client
participant API as RankingAPI
participant Redis as Redis ZSET
participant DB as ProductDB
C->>+API: GET /api/v1/rankings?date=20251222&page=0&size=20
API->>+Redis: ZREVRANGE ranking:all:{date}
Redis-->>-API: List<productId, score>
API->>+DB: ์ƒํ’ˆ ์ •๋ณด ์กฐํšŒ (productIds)
DB-->>-API: List<Product>
API->>API: ๋žญํ‚น + ์ƒํ’ˆ์ •๋ณด ์กฐํ•ฉ
API-->>-C: 200 OK (RankingResponse)
~~~
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โš ๏ธ Potential issue | ๐ŸŸ  Major

๐Ÿงฉ Analysis chain

๐Ÿ Script executed:

# First, find the Ranking API implementation
find . -type f \( -name "*.java" -o -name "*.kt" \) | head -20

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 1793


๐Ÿ Script executed:

# Search for Ranking API related code
rg -i "ranking.*api|/api.*ranking" --type java --type kotlin -A 5 | head -100

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 1653


๐Ÿ Script executed:

# Search for entity classes related to rankings
rg "ProductRank|ranking" --type java --type kotlin | grep -i "class\|entity" | head -30

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 535


๐Ÿ Script executed:

# Look for Spring Batch configuration
rg "batch|job|step" --type java --type kotlin | grep -i "ranking|weekly|monthly" | head -20

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 70


๐Ÿ Script executed:

# Check the current state of the documentation
cat -n docs/week9/02-sequence-diagrams.md | head -150

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 3967


๐Ÿ Script executed:

# Get the full RankingController implementation
cat apps/commerce-api/src/main/java/com/loopers/interfaces/api/ranking/RankingController.java

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 1161


๐Ÿ Script executed:

# Get the RankingFacade implementation
cat apps/commerce-api/src/main/java/com/loopers/application/ranking/RankingFacade.java

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 6987


๐Ÿ Script executed:

# Search for batch job configurations
find . -type f -name "*.java" | xargs grep -l "batch\|Batch\|Job\|job" | head -20

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 997


๐Ÿ Script executed:

# Check ProductRankWeekly and ProductRankMonthly entities
cat apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankWeekly.java
cat apps/commerce-api/src/main/java/com/loopers/infrastructure/ranking/ProductRankMonthly.java

Repository: Loopers-dev-lab/loopers-spring-java-template

Length of output: 6056


์ฃผ๊ฐ„/์›”๊ฐ„ ๋žญํ‚น ์กฐํšŒ API ์‹œํ€€์Šค ๋‹ค์ด์–ด๊ทธ๋žจ ์ถ”๊ฐ€ ํ•„์š”

PR์—์„œ Ranking API๋ฅผ period=daily|weekly|monthly๋กœ ํ™•์žฅํ–ˆ์œผ๋‚˜, ํ˜„์žฌ ๋‹ค์ด์–ด๊ทธ๋žจ์€ ์ผ์ผ ๋žญํ‚น๋งŒ ํ‘œ์‹œํ•ฉ๋‹ˆ๋‹ค. ์ฃผ๊ฐ„/์›”๊ฐ„ ๋žญํ‚น์€ Spring Batch(WeeklyRankingJobConfig, MonthlyRankingJobConfig)๋กœ ์ƒ์„ฑ๋œ MaterializedView(ProductRankWeekly, ProductRankMonthly)์—์„œ ์กฐํšŒ๋ฉ๋‹ˆ๋‹ค. ์ด ๋‘ ๊ฐ€์ง€ ๊ธฐ๊ฐ„์˜ ์กฐํšŒ ํ๋ฆ„์„ ๋ณ„๋„ ์‹œํ€€์Šค ๋‹ค์ด์–ด๊ทธ๋žจ์œผ๋กœ ์ถ”๊ฐ€ํ•ด์ฃผ์„ธ์š”.

๐Ÿค– Prompt for AI Agents
In docs/week9/02-sequence-diagrams.md around lines 91 to 107, the existing
sequence diagram shows only the daily ranking flow via Redis; add two additional
sequence diagrams (one for weekly, one for monthly) that show the API handling
period=weekly and period=monthly requests, where RankingAPI queries the
materialized views (ProductRankWeekly and ProductRankMonthly) in the ProductDB
(created by WeeklyRankingJobConfig and MonthlyRankingJobConfig) instead of
Redis, then fetches product details from ProductDB and combines ranking +
product info before returning 200 OK (RankingResponse); ensure the diagrams
explicitly label the participants (Client, RankingAPI, ProductDB and optionally
Batch jobs as creators) and show the conditional branch based on the period
query param so readers can see the separate retrieval paths for weekly/monthly
vs daily.

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