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Improve API cache invalidation for high-churn models

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This commit is contained in:
Kevin Gatera 2026-02-19 20:11:24 -05:00
parent fa5fa7b788
commit 05d9ab81f9
1 changed files with 40 additions and 1 deletions
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41
server/managers/ApiCacheManager.js
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@ -5,6 +5,9 @@ const Database = require('../Database')
class ApiCacheManager {
defaultCacheOptions = { max: 1000, maxSize: 10 * 1000 * 1000, sizeCalculation: (item) => item.body.length + JSON.stringify(item.headers).length }
defaultTtlOptions = { ttl: 30 * 60 * 1000 }
highChurnModels = new Set(['session', 'mediaProgress', 'playbackSession', 'device'])
modelsInvalidatingPersonalized = new Set(['mediaProgress'])
modelsInvalidatingMe = new Set(['session', 'mediaProgress', 'playbackSession', 'device'])
constructor(cache = new LRUCache(this.defaultCacheOptions), ttlOptions = this.defaultTtlOptions) {
this.cache = cache
@ -16,8 +19,44 @@ class ApiCacheManager {
hooks.forEach((hook) => database.sequelize.addHook(hook, (model) => this.clear(model, hook)))
}
getModelName(model) {
if (typeof model?.name === 'string') return model.name
if (typeof model?.model?.name === 'string') return model.model.name
if (typeof model?.constructor?.name === 'string' && model.constructor.name !== 'Object') return model.constructor.name
return 'unknown'
}
clearByUrlPattern(urlPattern) {
let removed = 0
for (const key of this.cache.keys()) {
try {
const parsed = JSON.parse(key)
if (typeof parsed?.url === 'string' && urlPattern.test(parsed.url)) {
if (this.cache.delete(key)) removed++
}
} catch {
if (this.cache.delete(key)) removed++
}
}
return removed
}
clearUserProgressSlices(modelName, hook) {
const removedPersonalized = this.modelsInvalidatingPersonalized.has(modelName) ? this.clearByUrlPattern(/^\/libraries\/[^/]+\/personalized/) : 0
const removedMe = this.modelsInvalidatingMe.has(modelName) ? this.clearByUrlPattern(/^\/me(\/|\?|$)/) : 0
Logger.debug(
`[ApiCacheManager] ${modelName}.${hook}: cleared user-progress cache slices (personalized=${removedPersonalized}, me=${removedMe})`
)
}
clear(model, hook) {
Logger.debug(`[ApiCacheManager] ${model.constructor.name}.${hook}: Clearing cache`)
const modelName = this.getModelName(model)
if (this.highChurnModels.has(modelName)) {
this.clearUserProgressSlices(modelName, hook)
return
}
Logger.debug(`[ApiCacheManager] ${modelName}.${hook}: Clearing cache`)
this.cache.clear()
}