Walkthrough

Updated congestion retrieval across services to use a new time-bucketed API (getTimeCongestion) returning Float, replacing getRedisCongestion. Call sites now convert to Int when populating DTOs. PlaceRedisUtil implements time-based keys with 3-hour buckets, TTL, and lazy initialization via setIfAbsent; prior method removed.

Changes

Sequence Diagram(s)

sequenceDiagram
  autonumber
  participant Svc as Service/Converter/Search
  participant Util as PlaceRedisUtil
  participant R as Redis

  Svc->>Util: getTimeCongestion(placeId[, dateTime])
  Util->>Util: Compute 3-hour bucketed key<br/>place:congestion:<id>-YYYY-M-D-HHbucket
  Util->>R: GET key
  alt Cache hit
    R-->>Util: value (Float as String)
    Util-->>Svc: Float
  else Cache miss
    Util->>Util: Generate congestion value
    Util->>R: SETNX key value EX 86400
    R-->>Util: OK/Already exists
    Util->>R: GET key
    R-->>Util: value
    Util-->>Svc: Float
  end
  note over Svc: Call sites convert to Int via toInt() when needed

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Possibly related PRs

• 지도 관련 API 3개 구현 #44 — Introduces and wires the same time-based congestion API in PlaceRedisUtil and updates callers to use getTimeCongestion.

Poem

Thump-thump go my paws on keys,
Time slices breeze like coastal seas.
From buckets three, the numbers climb,
Redis remembers, just in time.
I nibble bytes, convert to int—
Congestion mapped, a perfect hint.
Hop on—our data’s fresh and mint! 🐇📊

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