Dopo aver letto di sotto articoli/post sul blog, utilizzando Redis per pub/sub sopra socket.io pub/sub aiuterà in termini di scalabilità e prestazioni migliori.
https://github.com/sayar/RedisMVA/blob/master/module6_redis_pubsub/README.md
https://github.com/rajaraodv/redispubsub
Inoltre sono in grado di creare un rapido POC in chat usando Redis privati. Ecco il codice: -
var app = require('http').createServer(handler);
app.listen(8088);
var io = require('socket.io').listen(app);
var redis = require('redis');
var redis2 = require('socket.io-redis');
io.adapter(redis2({ host: 'localhost', port: 6379 }));
var fs = require('fs');
function handler(req,res){
fs.readFile(__dirname + '/index.html', function(err,data){
if(err){
res.writeHead(500);
return res.end('Error loading index.html');
}
res.writeHead(200);
console.log("Listening on port 8088");
res.end(data);
});
}
var store = redis.createClient();
var pub = redis.createClient();
var sub = redis.createClient();
sub.on("message", function (channel, data) {
data = JSON.parse(data);
console.log("Inside Redis_Sub: data from channel " + channel + ": " + (data.sendType));
if (parseInt("sendToSelf".localeCompare(data.sendType)) === 0) {
io.emit(data.method, data.data);
}else if (parseInt("sendToAllConnectedClients".localeCompare(data.sendType)) === 0) {
io.sockets.emit(data.method, data.data);
}else if (parseInt("sendToAllClientsInRoom".localeCompare(data.sendType)) === 0) {
io.sockets.in(channel).emit(data.method, data.data);
}
});
io.sockets.on('connection', function (socket) {
sub.on("subscribe", function(channel, count) {
console.log("Subscribed to " + channel + ". Now subscribed to " + count + " channel(s).");
});
socket.on("setUsername", function (data) {
console.log("Got 'setUsername' from client, " + JSON.stringify(data));
var reply = JSON.stringify({
method: 'message',
sendType: 'sendToSelf',
data: "You are now online"
});
});
socket.on("createRoom", function (data) {
console.log("Got 'createRoom' from client , " + JSON.stringify(data));
sub.subscribe(data.room);
socket.join(data.room);
var reply = JSON.stringify({
method: 'message',
sendType: 'sendToSelf',
data: "Share this room name with others to Join:" + data.room
});
pub.publish(data.room,reply);
});
socket.on("joinRooom", function (data) {
console.log("Got 'joinRooom' from client , " + JSON.stringify(data));
sub.subscribe(data.room);
socket.join(data.room);
});
socket.on("sendMessage", function (data) {
console.log("Got 'sendMessage' from client , " + JSON.stringify(data));
var reply = JSON.stringify({
method: 'message',
sendType: 'sendToAllClientsInRoom',
data: data.user + ":" + data.msg
});
pub.publish(data.room,reply);
});
socket.on('disconnect', function() {
sub.quit();
pub.publish("chatting","User is disconnected :" + socket.id);
});
});
codice HTML
<html>
<head>
<title>Socket and Redis in Node.js</title>
<script src="/socket.io/socket.io.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
</head>
<body>
<div id="username">
<input type="text" name="usernameTxt" />
<input type="button" name="setUsername" value="Set Username" />
</div>
<div id="createroom" style="display:none;">>
<input type="text" name="roomNameTxt" />
<input type="button" name="setRooomName" value="Set Room Name" />
<input type="button" name="joinRooomName" value="Join" />
</div>
<div id="sendChat" style="display:none;">
<input type="text" name="chatTxt" />
<input type="button" name="sendBtn" value="Send" />
</div>
<br />
<div id="content"></div>
<script>
$(document).ready(function() {
var username = "anonymous";
var roomname = "anonymous";
$('input[name=setUsername]').click(function(){
if($('input[name=usernameTxt]').val() != ""){
username = $('input[name=usernameTxt]').val();
//var msg = {type:'setUsername',user:username};
socket.emit('setUsername',{user:username});
}
$('#username').slideUp("slow",function(){
$('#createroom').slideDown("slow");
});
});
$('input[name=setRooomName]').click(function(){
if($('input[name=roomNameTxt]').val() != ""){
roomname = $('input[name=roomNameTxt]').val();
socket.emit('createRoom',{user:username,room:roomname});
}
$('#createroom').slideUp("slow",function(){
$('#sendChat').slideDown("slow");
});
});
$('input[name=joinRooomName]').click(function(){
if($('input[name=roomNameTxt]').val() != ""){
roomname = $('input[name=roomNameTxt]').val();
socket.emit('joinRooom',{room:roomname});
}
$('#createroom').slideUp("slow",function(){
$('#sendChat').slideDown("slow");
});
});
var socket = new io.connect('http://localhost:8088');
var content = $('#content');
socket.on('connect', function() {
console.log("Connected");
});
socket.on('message', function(message){
//alert('received msg=' + message);
content.append(message + '<br />');
}) ;
socket.on('disconnect', function() {
console.log('disconnected');
content.html("<b>Disconnected!</b>");
});
$("input[name=sendBtn]").click(function(){
var msg = {user:username,room:roomname,msg:$("input[name=chatTxt]").val()}
socket.emit('sendMessage',msg);
$("input[name=chatTxt]").val("");
});
});
</script>
</body>
</html>
quello sub.on ("messaggio", la funzione (canale, dei dati) {sta facendo qui è che non c'è alcun bisogno di questo in questo codice –
vedo che stai usando la stanza del socket.Può ridimensionare a più istanze? – Mubbashar
Perché crei la variabile 'store'? La vedo in:' var store = redis.createClient(); ' – Stephane