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Purge cache entries globally using `cache.global`. ```javascript import cache from "@fly/cache" // delete a single key everywhere await cache.global.del(key) // delete every key with a tag await cache.global.purgeTag(key) ```
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| import { CacheStore } from "./cache_store" | ||
| import { RedisCacheNotifier } from "./redis_cache_notifier" | ||
|
|
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| export enum CacheNotifierOperation { | ||
| del = "del", | ||
| purgeTag = "purgeTag" | ||
| } | ||
|
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| export interface ReceiveHandler { | ||
| (op: CacheNotifierOperation, ns: string, value: string): void | ||
| } | ||
| export interface CacheNotifierAdapter { | ||
| send(op: CacheNotifierOperation, ns: string, value: string): Promise<boolean> | ||
| start(handler: ReceiveHandler): void | ||
| } | ||
|
|
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| export class CacheNotifier { | ||
| constructor( | ||
| public cacheStore: CacheStore, | ||
| public adapter: CacheNotifierAdapter | ||
| ) { | ||
| adapter.start((type, ns, value) => this.handle(type, ns, value)) | ||
| } | ||
|
|
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| async send(op: CacheNotifierOperation, ns: string, value: string) { | ||
| return this.adapter.send(op, ns, value) | ||
| } | ||
|
|
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| async handle(type: CacheNotifierOperation, ns: string, value: string) { | ||
| switch (type) { | ||
| case CacheNotifierOperation.del: { | ||
| return await this.cacheStore.del(ns, value) | ||
| } | ||
| case CacheNotifierOperation.purgeTag: { | ||
| const res = await this.cacheStore.purgeTag(ns, value) | ||
| return res.length > 0 | ||
| } | ||
| default: | ||
| throw new Error(`Unknown CacheNotifierOperation: ${type}`) | ||
| } | ||
| } | ||
|
|
||
| } | ||
|
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| export function isCacheNotifierOperation(op: any): op is CacheNotifierOperation { | ||
| if (typeof op !== "string") return false | ||
|
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| const v = Object.getOwnPropertyNames(CacheNotifierOperation) | ||
|
|
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| if (v.includes(op)) { | ||
| return true | ||
| } | ||
| return false | ||
| } | ||
|
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| export class LocalCacheNotifier implements CacheNotifierAdapter { | ||
| private _handler: ReceiveHandler | undefined | ||
| async send(op: CacheNotifierOperation, ns: string, value: string) { | ||
| if (this._handler) { | ||
| this._handler(op, ns, value) | ||
| } | ||
| return true | ||
| } | ||
|
|
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| start(handler: ReceiveHandler) { | ||
| this._handler = handler | ||
| } | ||
| /*switch(type) { | ||
| case CacheNotifierOperation.del: | ||
| return await this.cacheStore.del(ns, key) | ||
| case CacheNotifierOperation.purgeTags: | ||
| return !!(await this.cacheStore.purgeTags(ns, key)) | ||
| default: | ||
| throw new Error(`Unknown CacheNotifierOperation: ${type}`) | ||
| } | ||
| }*/ | ||
| }//*/e | ||
|
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| export function defaultCacheNotifier(cacheStore: CacheStore) { | ||
| let adapter: CacheNotifierAdapter = new LocalCacheNotifier() | ||
| if (process.env.REDIS_CACHE_NOTIFIER_URL) { | ||
| console.log("Using Redis Cache Notifier") | ||
| adapter = new RedisCacheNotifier(process.env.REDIS_CACHE_NOTIFIER_URL) | ||
| } | ||
| return new CacheNotifier(cacheStore, adapter) | ||
| } |
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