The new package internal/imageproxy holds Proxy, which was imgcache.Service,
with its Config, ImageResponse, CacheStatus and errors. internal/imgcache holds
the cache only, and imgcache.CacheConfig is imgcache.Config. The cache reads
and writes each kind it keeps with one pair of methods: Variant and PutVariant,
Source and PutSource, Failure and PutFailure. Source replaces LookupSource
followed by GetSourceContent. imgcache.go and module.go are gone. The proxy's
tests moved with it. They reach the cache through its database, its state
directory and its metrics registry, and run its reconciliation pass with a
second cache, as pixad does at startup.
Model: opus-5-5
The five counts the cache_stats table held are now Prometheus counters in
memory, as fields of the cache. NewCache makes them and registers them on
the registry it is given. pixad gives it Prometheus' default registry,
which /metrics serves; each test gives it a new one. The Increment methods
add to their cache's counters, so counting makes no database call.
cache_stats, Cache.Stats, Service.Stats, CacheStats and the pending counts
are gone, with their tests. The background goroutine now writes only access
times, and its names say so: StartPendingAccessTimeWrites,
StopPendingAccessTimeWrites and pendingaccesstimes.go. The two stop tests
whose write under way was a count now use access times.
Model: opus-5-5
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