Introduction

Cache your data with TTL. Using this package in node.js and browser.

Installation

By npm

npm install cache-bucket

Or by yarn

yarn add cache-bucket

Support

Node.js

FileCache and MemoryCache is enable.

Notice that CacheFile will touch a file as storage. The default file path is: ./.filecache

// Based on file
import {cache} from 'cache-bucket/file-cache';

// Based on memory
import {cache} from 'cache-bucket/memory-cache';

Browser

LocalCache and SessionCache and MemoryCache is enable.

Notice that LocalCache is based on localStorage, and SessionCache is based on sessionStorage.

// Based on memory
import {cache} from 'cache-bucket/memory-cache';

// Based on localStorage
import {cache} from 'cache-bucket/local-cache';

// Based on sessionStorage
import {cache} from 'cache-bucket/session-cache';

Methods

get(key: string, defaultValue?: any) => any

Get your cache by key.

If cache is empty, defaultValue will be used. If parameter defaultValue is missing, method will respond null.

cache.get('foo'); // null
cache.get('foo', 'default-bar'); // default-bar

set(key: string, value: any, duration?: number) => void

Set cache data.

The parameter value type can be string, number, object, array. Cache data will expired after millSeconds when you provide duration.

cache.set('foo', 'bar');
cache.set('obj', {pkg: 'cache-bucket'});

// Expired after 3 second.
cache.set('array', ['cache', 'bucket'], 3000);

getOrSet(key: string, onEmpty: () => any, duration?: number) => any

Get cache data.

When cache data is missing, method will set data immediately. And then return it.

cache.getOrSet('foo', () => {
  return 'bar';
}); // bar

add(key: string, value: any, duration?: number) => boolean

Set cache data when key is not exist.

cache.add('foo', 'bar'); // true
cache.add('foo', 'new-bar'); // false

remove(key: string) => void

Delete a cache data.

cache.remove('foo');

clearExpired() => void

Clear all expired cache data

cache.clearExpired();

clearAll() => void

Clear all data.

cache.clearAll();

Advanced

Multiply instances.

import {MemoryCache} from 'cache-bucket/memory-cache';

const cache = new MemoryCache();

cache.set('foo', 'bar');
cache.get('foo'); // bar

import {FileCache} from 'cache-bucket/file-cache';

const cache = new FileCache('./.new-cachefile');

cache.set('foo', 'bar');
cache.get('foo'); // bar

Config

You can choose the file you want to put data when Using FileCache. Just creating config file cache-bucekt.json in project's root directory.

{
  "defaultFilePath": "./.custom-cache-file"
}