Make CLS play nice with Redis

Forked from cls-redis

redis works great, unless you're using cls or cls-hooked, which wants to provide consistent access to stored values across entire asynchronous call chains. You could use ns.bind to put all your Redis callbacks on the correct continuation chain, but that breaks down if you forget even one callback passed to client.get().

This shim's job is to take care of the bookkeeping for you. It monkeypatches the Redis driver to ensure that all the callbacks you provide are bound to the CLS namespace you provide to the shim. Use it like so:

var cls = require('continuation-local-storage'); // var cls = require('cls-hooked');
var ns = cls.createNamespace('test');

var patchRedis = require('cls-redis-patch');
patchRedis(ns);

var redis = require('redis');
var client = redis.createClient();

You can patch Redis for more than one namespace, but you're going to notice the performance impact pretty quickly, so try not to do that.

Redis Support

Tested on redis v2.6.0

Tests

The tests assume a Redis server is up and running on localhost on the standard port.

TODO

Support latest version of redis