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December 9, 2022 17:12
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A ttl cache for use with Dataloader's cacheMap option
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| export const ttlCache = <K extends string, V = any>({ ttl, maxSize }: { ttl: number, maxSize?: number }) => { | |
| let cache: Record<K, { value: V; expiresAt: number } | undefined> = Object.create(null); | |
| return { | |
| set: (key: K, value: V) => { | |
| const keys = Object.keys(cache) as K[]; | |
| if (maxSize && keys.length === maxSize) { | |
| delete cache[keys[0]]; | |
| } | |
| cache[key] = { value, expiresAt: Date.now() + ttl }) | |
| }, | |
| get: (key: K) => { | |
| const entry = cache[key]; | |
| if (!entry) { | |
| return undefined; | |
| } | |
| if (entry.expiresAt < Date.now()) { | |
| delete cache[key]; | |
| return undefined; | |
| } | |
| return entry.value; | |
| }, | |
| clear: () => (cache = Object.create(null)), | |
| delete: (key: K) => (cache[key] = undefined), | |
| }; | |
| }; |
Hi Andy, I don't see a license on this and would like to use this code if it is open source. Any chance you could let me know the license for this?
@madiganz feel free to copy/change/redistribute as you please
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Thank you!