fs-memory-store

Filesystem store with in-memory cache

This was built for usage with eight-track, an HTTP fixture library. It is designed for ease-of-access while debugging. By default, items will be stored to separate .json files in the folder.

Getting Started

Install the module with: npm install fs-memory-store

// Generate a store inside of `http-fixtures`
var Store = require('fs-memory-store');
var store = new Store(__dirname + '/http-fixtures');

// Save a value
store.set('hello', {world: true}, function (err) {
  // If there was an error, `err` will be it

  // We have created `http-fixtures/hello.json`
  /*
  {
    "world": true
  }
  */

  // Load the value
  store.get('hello', function (err, val) {
    // If there was an error, `err` will be it
    // Log our value
    console.log(val); /* {world: true} */
  });

  // Load an non-existent value
  store.get('wat', function (err, val) {
    // If there was an error, `err` will be it
    // Log our value
    console.log(val); /* null */
  });
});

Documentation

fs-memory-store returns Store as its module.exports.

Store(dir, options)

Constructor for a new store

• dir String, Directory to generate our store inside of
• options Object, Container for options/flags
  • ext String, Extension to save values under. By default, this is .json
  • stringify Function, Stringifier to pass values through when saving to disk
    • By default, this is JSON.stringify with an indenation of 2
  • parse Function, Parser to pass values through when loading from disk
    • By default, this is JSON.parse

Store#get(key, cb)

Retrieve an item from memory with a fallback to disk.

• key String, Identifier to retrieve item by
• cb Function, Error-first callback function to receive item value
  • Signature should be (err, val)
  • err Error|null, If there was an error, this will be it
  • val Mixed|null, If the value was found, this will be it. If it was not found, this will be null.

Store#set(key, val, cb)

Save an item to memory and disk

• key String, Identifier to save item under
• val Mixed, Value to save under the key
• cb Function, Error-first callback function to handle errors
  • Signature should be (err)
  • err Error|null, If there was an error, this will be it

Store#delete(key, cb)

Delete an item from memory and disk

• key String, Identifier to delete item under
• cb Function, Error-first callback function to handle errors
  • Signature should be (err)
  • err Error|null, If there was an error, this will be it

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint via grunt and test via npm test.

Donating

Support this project and others by twolfson via gittip.

License

Copyright (c) 2014 Todd Wolfson

Licensed under the MIT license.