55 lines
1.2 KiB
TypeScript
55 lines
1.2 KiB
TypeScript
import { Model } from 'sequelize-typescript'
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import * as Bluebird from 'bluebird'
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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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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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}
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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: () => Bluebird<T>
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whitelist?: () => boolean
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}) {
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const { cacheType, key, fun, whitelist } = 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 Bluebird.resolve<T>(cache.get(key))
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}
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return fun().then(m => {
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if (!whitelist || whitelist()) cache.set(key, m)
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return m
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})
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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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