maqu14
55 lines
1.2 KiB
JavaScript
55 lines
1.2 KiB
JavaScript
/*
|
|
*
|
|
* Publisher subscriber pattern
|
|
*
|
|
*/
|
|
|
|
var cluster = require('cluster')
|
|
, zmq = require('../')
|
|
, port = 'tcp://127.0.0.1:12345';
|
|
|
|
if (cluster.isMaster) {
|
|
for (var i = 0; i < 2; i++) cluster.fork();
|
|
|
|
cluster.on('death', function(worker) {
|
|
console.log('worker ' + worker.pid + ' died');
|
|
});
|
|
|
|
//publisher = send only
|
|
|
|
var socket = zmq.socket('pub');
|
|
|
|
socket.identity = 'publisher' + process.pid;
|
|
|
|
var stocks = ['AAPL', 'GOOG', 'YHOO', 'MSFT', 'INTC'];
|
|
|
|
socket.bind(port, function(err) {
|
|
if (err) throw err;
|
|
console.log('bound!');
|
|
|
|
setInterval(function() {
|
|
var symbol = stocks[Math.floor(Math.random()*stocks.length)]
|
|
, value = Math.random()*1000;
|
|
|
|
console.log(socket.identity + ': sent ' + symbol + ' ' + value);
|
|
socket.send(symbol + ' ' + value);
|
|
}, 100);
|
|
});
|
|
} else {
|
|
//subscriber = receive only
|
|
|
|
var socket = zmq.socket('sub');
|
|
|
|
socket.identity = 'subscriber' + process.pid;
|
|
|
|
socket.connect(port);
|
|
|
|
socket.subscribe('AAPL');
|
|
socket.subscribe('GOOG');
|
|
|
|
console.log('connected!');
|
|
|
|
socket.on('message', function(data) {
|
|
console.log(socket.identity + ': received data ' + data.toString());
|
|
});
|
|
} |