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Apr 7, 2013

node-cache-manager npm version codecov

Flexible NodeJS cache module

A cache module for nodejs that allows easy wrapping of functions in cache, tiered caches, and a consistent interface.

Features

  • Made with Typescript and compatible with ESModules
  • Easy way to wrap any function in cache.
  • Tiered caches -- data gets stored in each cache and fetched from the highest. priority cache(s) first.
  • Use any cache you want, as long as it has the same API.
  • 100% test coverage via vitest.

Installation

pnpm install cache-manager

Usage Examples

Single Store

import { caching } from 'cache-manager';

const memoryCache = await caching('memory', {
  max: 100,
  ttl: 10 * 1000 /*miliseconds*/,
});

const ttl = 5 * 1000; /*miliseconds*/
await memoryCache.set('foo', 'bar', ttl);

console.log(await memoryCache.get('foo'));
// >> "bar"

await memoryCache.del('foo');

console.log(await memoryCache.get('foo'));
// >> undefined

const getUser = (id: string) => new Promise.resolve({ id: id, name: 'Bob' });

const userId = 123;
const key = 'user_' + userId;

console.log(await memoryCache.wrap(key, () => getUser(userId), ttl));
// >> { id: 123, name: 'Bob' }

See unit tests in test/caching.test.ts for more information.

Example setting/getting several keys with mset() and mget()

await memoryCache.store.mset(
  [
    ['foo', 'bar'],
    ['foo2', 'bar2'],
  ],
  ttl,
);

console.log(await memoryCache.store.mget('foo', 'foo2'));
// >> ['bar', 'bar2']

// Delete keys with mdel() passing arguments...
await memoryCache.store.mdel('foo', 'foo2');

Example Express App Usage

Custom Stores

You can use your own custom store by creating one with the same API as the built-in memory stores.

Multi-Store

import { multiCaching } from 'cache-manager';

const multiCache = multiCaching([memoryCache, someOtherCache]);
const userId2 = 456;
const key2 = 'user_' + userId;
const ttl = 5;

// Sets in all caches.
await multiCache.set('foo2', 'bar2', ttl);

// Fetches from highest priority cache that has the key.
console.log(await multiCache.get('foo2'));
// >> "bar2"

// Delete from all caches
await multiCache.del('foo2');

See unit tests in test/multi-caching.test.ts for more information.

Store Engines

Official and updated to last version

Third party

Contribute

If you would like to contribute to the project, please fork it and send us a pull request. Please add tests for any new features or bug fixes.

License

node-cache-manager is licensed under the MIT license.