How to use the sharedb.PubSub function in sharedb

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github share / sharedb-redis-pubsub / index.js View on Github external
var redis = require('redis');
var PubSub = require('sharedb').PubSub;

// Redis pubsub driver for ShareDB.
// The redis driver requires two redis clients (a single redis client can't do
// both pubsub and normal messaging). These clients will be created
// automatically if you don't provide them.
function RedisPubSub(options) {
  if (!(this instanceof RedisPubSub)) return new RedisPubSub(options);, options);
  options || (options = {});

  this.client = options.client || redis.createClient(options);

  // Redis doesn't allow the same connection to both listen to channels and do
  // operations. Make an extra redis connection for subscribing with the same
  // options if not provided