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feat: expose jikan cache metrics

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mkelvers
2026-06-21 17:18:52 +02:00
committed by Milas Holsting
parent 3d76046762
commit 1250c591b7
2 changed files with 95 additions and 1 deletions
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4
internal/observability/metrics_test.go
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@@ -21,6 +21,7 @@ func TestMetricsHandlerRendersPrometheusFamilies(t *testing.T) {
metrics.ObserveWorkerTick("episodes_availability", nil)
metrics.ObserveCache("jikan", "hit")
metrics.ObserveCache("episode_availability", "miss")
metrics.ObserveJikanCacheStats(12, 3, 1770000000)
req := httptest.NewRequestWithContext(context.Background(), http.MethodGet, "/metrics", nil)
rec := httptest.NewRecorder()
@@ -39,6 +40,9 @@ func TestMetricsHandlerRendersPrometheusFamilies(t *testing.T) {
assertContains(t, text, `mal_db_query_duration_seconds_count{operation="query",result="success"} 1`)
assertContains(t, text, `mal_worker_ticks_total{result="success",worker="episodes_availability"} 1`)
assertContains(t, text, `mal_cache_operations_total{cache="episode_availability",result="miss"} 1`)
assertContains(t, text, `mal_jikan_cache_rows{state="total"} 12`)
assertContains(t, text, `mal_jikan_cache_rows{state="expired"} 3`)
assertContains(t, text, `mal_jikan_cache_oldest_expires_at_seconds 1770000000`)
}
func TestInstrumentDBRecordsQueryLatency(t *testing.T) {