mirror of https://github.com/Chocobozzz/PeerTube
91 lines
2.1 KiB
TypeScript
91 lines
2.1 KiB
TypeScript
import { Model } from 'sequelize-typescript'
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import { logger } from '@server/helpers/logger'
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type ModelCacheType =
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'local-account-name'
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| 'local-actor-name'
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| 'local-actor-url'
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| 'load-video-immutable-id'
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| 'load-video-immutable-url'
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type DeleteKey =
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'video'
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class ModelCache {
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private static instance: ModelCache
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private readonly localCache: { [id in ModelCacheType]: Map<string, any> } = {
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'local-account-name': new Map(),
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'local-actor-name': new Map(),
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'local-actor-url': new Map(),
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'load-video-immutable-id': new Map(),
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'load-video-immutable-url': new Map()
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}
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private readonly deleteIds: {
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[deleteKey in DeleteKey]: Map<number, { cacheType: ModelCacheType, key: string }[]>
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} = {
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video: new Map()
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}
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private constructor () {
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}
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static get Instance () {
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return this.instance || (this.instance = new this())
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}
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doCache<T extends Model> (options: {
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cacheType: ModelCacheType
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key: string
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fun: () => Promise<T>
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whitelist?: () => boolean
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deleteKey?: DeleteKey
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}) {
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const { cacheType, key, fun, whitelist, deleteKey } = options
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if (whitelist && whitelist() !== true) return fun()
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const cache = this.localCache[cacheType]
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if (cache.has(key)) {
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logger.debug('Model cache hit for %s -> %s.', cacheType, key)
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return Promise.resolve<T>(cache.get(key))
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}
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return fun().then(m => {
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if (!m) return m
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if (!whitelist || whitelist()) cache.set(key, m)
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if (deleteKey) {
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const map = this.deleteIds[deleteKey]
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if (!map.has(m.id)) map.set(m.id, [])
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const a = map.get(m.id)
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a.push({ cacheType, key })
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}
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return m
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})
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}
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invalidateCache (deleteKey: DeleteKey, modelId: number) {
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const map = this.deleteIds[deleteKey]
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if (!map.has(modelId)) return
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for (const toDelete of map.get(modelId)) {
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logger.debug('Removing %s -> %d of model cache %s -> %s.', deleteKey, modelId, toDelete.cacheType, toDelete.key)
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this.localCache[toDelete.cacheType].delete(toDelete.key)
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}
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map.delete(modelId)
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}
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}
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export {
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ModelCache
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}
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