var socket_array = new Array();
var socket_name_array = new Array();

var io = require('socket.io').listen(80);

io.sockets.on('connection', function (socket) {

socket_array.push(socket);
var i = socket_array.indexOf(socket);
var name = generate_random_name();
socket_name_array[i]= name;

  socket.on('get_name', function (data) {

var i = socket_array.indexOf(socket);
var name= socket_name_array[i]
socket.emit('socket_name' , {name :name } );


  });
});

function generate_random_name(){

var random_string;
//code
return random_string;

}

var redis = require('redis'),
var pub = redis.createClient(port, host),
var sub = redis.createClient(port, host),
var client = redis.createClient(port, host);

io.configure(function(){
    io.set('store', new RedisStore({
        redisPub: pub,
        redisSub : sub,
        redisClient : client
    }));
});

io.sockets.on('connection', function (socket) {
  var name = generate_random_name();
  socket.set('name', name); // store it in redis and forward this to other socket.io servers

  // On another server, if you want to retrieve this value from this socket just do:
  socket.get('name', function(err, name){
    // don't forget err. handling
    console.log(name);
  });

});