node-redis/examples/pub_sub.js

'use strict';

var redis = require('redis');
var client1 = redis.createClient();
var msg_count = 0;
var client2 = redis.createClient();

// Most clients probably don't do much on 'subscribe'. This example uses it to coordinate things within one program.
client1.on('subscribe', function (channel, count) {
    console.log('client1 subscribed to ' + channel + ', ' + count + ' total subscriptions');
    if (count === 2) {
        client2.publish('a nice channel', 'I am sending a message.');
        client2.publish('another one', 'I am sending a second message.');
        client2.publish('a nice channel', 'I am sending my last message.');
    }
});

client1.on('unsubscribe', function (channel, count) {
    console.log('client1 unsubscribed from ' + channel + ', ' + count + ' total subscriptions');
    if (count === 0) {
        client2.end();
        client1.end();
    }
});

client1.on('message', function (channel, message) {
    console.log('client1 channel ' + channel + ': ' + message);
    msg_count += 1;
    if (msg_count === 3) {
        client1.unsubscribe();
    }
});

client1.on('ready', function () {
    // if you need auth, do it here
    client1.incr('did a thing');
    client1.subscribe('a nice channel', 'another one');
});

client2.on('ready', function () {
    // if you need auth, do it here
});