java-cachelisted

# Spring Cache Skill Detect the cache provider in use, then apply the correct patterns. ## Step 1 — Detect setup Check `pom.xml` or `build.gradle`: - `spring-boot-starter-data-redis` → Redis (Lettuce client by default) - `spring-boot-starter-cache` + `caffeine` → Caffeine (in-process) - `spring-boot-starter-cache` only → Simple (ConcurrentHashMap, dev only) - None present → offer to add (recommend Caffeine for single-instance, Redis for multi-instance/distributed) Check Spring Boot version: - Boot 3.x → Lettuce 6.x, Caffeine 3.x - Boot 2.x → Lettuce 5.x, Caffeine 2.x/3.x --- ## Mode: `review` User asks to review existing cache configuration. Check for: - [ ] `@EnableCaching` present on a `@Configuration` class — missing it silently disables all cache annotations - [ ] Cache names declared in `application.yml` with explicit TTL — no unnamed or unbounded caches - [ ] `@Cacheable` methods are on Spring-managed beans (not `private`, not called within the same class — proxy bypass) - [ ] Cache keys are deterministic — `@Cacheable(key = "#id")` not `#root.methodName` unless intentional - [ ] `@CacheEvict` present wherever data is mutated — missing eviction causes stale cache - [ ] `@CachePut` used to update cache on write — not a `@CacheEvict` + re-fetch pattern - [ ] Redis serialization configured — default JDK serialization is not readable/portable; use `GenericJackson2JsonRedisSerializer` - [ ] Redis TTL set — without `time-to-live`, entries never expire - [ ] Caffeine `