mewtwo

A small redis multi-key semaphore lib for nodejs, based on the redfour library

Prequisites

Written in coffeescript, so a coffee compiler is needed to build

``sh
npm install -g coffee-script
`

Install

`sh
npm install mewtwo --save
`

Usage example

`coffeescript
Mewtwo = require "mewtwo"

mew = new Mewtwo
log: true # Log stats for each acquire.
timeout: 5000 # Locks expire after 5 seconds
redfour: # Initialization options for redfour
redis: "redis://localhost:6379"
namespace: "mewtwo"

mew.acquire ["key2", "key3"], (err, multiLock) =>
if err
console.log "Error acquiring: #{err}"
else
console.log "key1 & key2 are successfuly locked"

Another process might try to lock a similar set of keys

mew.acquire ["key1", "key2"], (err, multiLock) =>
# err equals "key2 is locked"
# key1 remains unlocked
# multiLock is null

When done using the resource, keys can be unlocked with

mew.release multiLock, (err) ->
if !err
console.log "multiLock unlocked successfuly"
``

Check out tests for more details.