asmhatre
a9867c0423
A Spring Boot 4.1.1 module whose test suite is the evidence for the article: 20 tests producing 22 transcripts under docs/output/, plus 12 documentation chapters. Findings the build pins: - @EnableCaching has no exposeProxy attribute; the widely-copied @EnableCaching(exposeProxy = true) does not compile. - Two methods sharing a cache name and an argument type share a key space, and one silently serves the other's answers. - The documented cache-provider detection order does not match CacheType's enum order in 4.1.1: COUCHBASE before INFINISPAN, and CACHE2K before CAFFEINE. - beforeInvocation = true is NOT deferred by TransactionAwareCacheManagerProxy on 7.0.9 - doEvict picks evictIfPresent, which the decorator does not intercept. - Four of five invalid declarations start a clean context and throw at the first call. - Caffeine on the classpath silently displaces the simple provider.
34 lines
1.3 KiB
Plaintext
34 lines
1.3 KiB
Plaintext
# Nothing in application.yml selects a provider. Something still chose one.
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spring.cache.type : (not set)
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resolved CacheManager bean : org.springframework.cache.caffeine.CaffeineCacheManager
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Caffeine is on this module's classpath because a later chapter needs TTL and
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size bounds. That single dependency moved every cache in the application off
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the ConcurrentHashMap-backed 'simple' provider.
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--- the detection order, read out of the enum rather than the documentation ---
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1 GENERIC
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2 JCACHE
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3 HAZELCAST
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4 COUCHBASE
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5 INFINISPAN
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6 REDIS
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7 CACHE2K
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8 CAFFEINE
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9 SIMPLE
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10 NONE
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CacheConfigurations maps CacheType -> configuration class in an EnumMap, so
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the configurations are imported in this declaration order and the first one
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whose @ConditionalOnClass matches registers the CacheManager. The rest back
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off on @ConditionalOnMissingBean.
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Spring Boot's reference documentation lists this order as Generic, JCache,
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Hazelcast, Infinispan, Couchbase, Redis, Caffeine, Cache2k, Simple. On
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4.1.1 the enum disagrees in two places: COUCHBASE comes before INFINISPAN,
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and CACHE2K comes before CAFFEINE. The second one is the one that can bite:
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with both on the classpath you get Cache2k, not Caffeine.
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Nothing logs the decision at INFO. Set spring.cache.type explicitly.
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