cacheman

Small and efficient cache provider for Node.JS with In-memory, Redis and MongoDB engines.

Instalation

$ npm install cacheman

Usage

var Cacheman = require('cacheman');
var cache = new Cacheman('todo');

// set the value
cache.set('my key', { foo: 'bar' }, function (error) {

  if (error) throw error;

  // get the value
  cache.get('my key', function (error, value) {

    if (error) throw error;

    console.log(value); //-> {foo:"bar"}

    // delete entry
    cache.del('my key', function (error){
      
      if (error) throw error;

      console.log('value deleted');
    });

  });
});

API

Cacheman(name, [options])

Create cacheman instance. It accepts a required name and an options. options can contain ttl to set the default "Time To Live" in seconds, engine that could be "memory", "redis" or "mongo", and the corresponding engine options that can be passed like port, host, etc.

By default cacheman uses the cacheman-memory engine.

var options = {
  ttl: 90,
  engine: 'redis',
  port: 9999,
  host: '127.0.0.1'
};

var cache = new Cacheman('todo', options);

cache.set(key, value, [ttl, [fn]])

Stores or updates a value.

cache.set('foo', { a: 'bar' }, function (err, value) {
  if (err) throw err;
  console.log(value); //-> {a:'bar'}
});

Or add a TTL(Time To Live) in seconds like this:

// key will expire in 60 seconds
cache.set('foo', { a: 'bar' }, 60, function (err, value) {
  if (err) throw err;
  console.log(value); //-> {a:'bar'}
});

You can also use humman readable values for ttl like: 1s, 1m, etc. Check out the ms project for additional information on supported formats.

// key will expire in 45 seconds
cache.set('foo', { a: 'bar' }, '45s', function (err, value) {
  if (err) throw err;
  console.log(value); //-> {a:'bar'}
});

cache.get(key, fn)

Retrieves a value for a given key, if there is no value for the given key a null value will be returned.

cache.get(function (err, value) {
  if (err) throw err;
  console.log(value);
});

cache.del(key, [fn])

Deletes a key out of the cache.

cache.del('foo', function (err) {
  if (err) throw err;
  // foo was deleted
});

cache.clear([fn])

Clear the cache entirely, throwing away all values.

cache.clear(function (err) {
  if (err) throw err;
  // cache is now clear
});

Run tests

$ make test

Supported engines

• cacheman-memory
• cacheman-redis
• cacheman-mongo

Credits

This library was inspired by the hilmi project.

License

(The MIT License)

Copyright (c) 2013 Jonathan Brumley <cayasso@gmail.com>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.