ØMQ - The Guide

// Weather update server in node.js
// Binds PUB socket to tcp://*:5556
// Publishes random weather updates

var zmq = require('zmq')
var publisher = zmq.socket('pub')

publisher.bindSync("tcp://*:5556")
publisher.bindSync("ipc://weather.ipc")

function zeropad(num) {
while(num.length < 5) {
num = "0" + num
}
return num
}

function rand(upper, extra) {
var num = Math.abs(Math.round(Math.random() * upper))
return num + (extra || 0)
}

while(true) {
// Get values that will fool the boss
var zipcode = rand(100000)
var temperature = rand(215, -80)
var relhumidity = rand(50, 10)

var update = zeropad(zipcode.toString()) + ' ' + temperature + ' ' + relhumidity
publisher.send(update)
}