lambda-cache

A simple, fast, cheap and lightweight dependency-less, cache system for AWS Lambda functions, based on writing to files in the "/tmp" folder. It allows you to set a time-to-live (TTL) for cache keys and invalidate the cache.

Installation

You can install the package via npm:

npm install lambda-cache

Usage

import { Cache } from 'lambda-cache';

// Create a new cache with the default base path /tmp/cache
const cache = new Cache();

// Set a value
cache.set('key', 'value', 10);  // expires in 10 seconds

// Get a value
console.log(cache.get('key'));

// Delete a value
cache.delete('key');

// Clear all values
cache.clear();

API

new Cache(path: string, ttl?: number)

Creates a new cache instance that stores the data in the specified path.

• path: the path where the cache files will be stored.
• ttl (optional): the time to live for cache entries in milliseconds.

cache.set(key: string, value: any, ttl?: number)

Stores a value in the cache.

• key: the key used to store and retrieve the value.
• value: the value to store.
• ttl (optional): the time to live for this cache entry in milliseconds. If not provided, the default value set in the constructor will be used.

cache.get(key: string)

Retrieves a value from the cache.

• key: the key used to store the value.

Returns the stored value or undefined if the key does not exist or the value has expired.

cache.delete(key: string)

Deletes a value from the cache.

• key: the key used to store the value.

cache.clear()

Clears all the values from the cache.