Lock API using Redis

lock.js

var redis = require('redis');
var redlock = require('redlock');

var getLock2 = redlock({
    client : client,
    prefix : 'lock:', // optional
});

var getLock2 = redlock({
    // same credentials as redis.createClient()
});

// simple example
getLock1('alock', function(err, lock) {
    // if there's been a bad error, get out of here
    if (err) throw err;

    // if we didn't get the lock, just return
    if ( !lock ) return;

    doSomethingInvolvingAsync(function(err) {
        // we've now finished with the lock
        lock.release();
    });
});

// more complete example, hold lock for 2 mins
console.log('Trying to get mylock');
getLock2('mylock', 120, function(err, lock) {
    // if something went badly wrong, we need to do something
    if (err) throw err;

    if ( lock ) {
        // yes, we got the lock, so do something and then call done
        doSomething();

        // if something takes a while, tell the lock you're still alive
        lock.ping(function(err) {
            // You don't need to listen for when the lock has been
            // kept alive, but you could do if you want to log it.
            console.log('Lock has been pinged');
        });

        return lock.release(function(err) {
            // You don't need to listen for when the lock has been released
            // but you could do, if you just want to log it or something.
            console.log('Lock has been released');
        });
    }

    // not got the lock ... from here we can retry or just quit
    console.log("Didn't get lock");
});

What module are you using for redlock? I can't find it in npm. Care you chime in about it here: redis/node-redis#687