A high-level Redis library.
$ npm install redback
Redback provides an accessible and extensible interface to the Redis data types and allows you to create your own structures with ease. Redback comes with the following built-in structures: List, Set, SortedSet, Hash, Channel, Cache
It also comes with the following advanced data structures:
- DensitySet - A sorted set where adding an element increments its score and removing it decrements it
- KeyPair - Uses two hash structures and an auto-incrementing key to assign an ID to each unique value
- SocialGraph - Similar to Twitter's (following vs. followers)
- CappedList - A list with a fixed length
- Queue - A simple FIFO or LIFO queue
- RateLimit - Count the number of times an event occurs over an interval. See this introduction.
- BloomFilter - A probabilistic structure used to test whether an an element exists in a set
var redback = ;// orvar redis = ;var redback = ;
var user3 = redback;user3;var log = redback;log;var user = redback;user;
Creating your own structures
addStructure(name, methods) to create your own structure.
Let's create a queue that can be either FIFO or LIFO:
createSimpleQueue(key, options) to use the queue:
var queue = redback;queue;
Structures have access to a Redis key
this.key and the Redis client
this.client. If an
init() method is defined then it is called after
the structure is instantiated. Also note that
init() receives any extra parameters
var cache = redback;cache;cache;
var channel = redback;//To received messageschannel;//To send messageschannel;
See the annotated source.
The tests require a local redis instance running on
localhost:6379. Note that
redis database #11 will be flushed prior to each run.
$ npm test