Is websockets for asynchronis programming only?

Question

I am new to asynchronis programming and think I understand the concept: What is the difference between synchronous and asynchronous programming (in node.js)

I am looking at a project that uses a websockets data feed: http://pastebin.com/dMX7mZE0

var autobahn = require('autobahn');
var wsuri = "wss://api.poloniex.com";
var connection = new autobahn.Connection({
  url: wsuri,
  realm: "realm1"
});

connection.onopen = function (session) {
        function marketEvent (args,kwargs) {
                console.log(args);
        }
        function tickerEvent (args,kwargs) {
                console.log(args);
        }
        function trollboxEvent (args,kwargs) {
                console.log(args);
        }
        session.subscribe('BTC_XMR', marketEvent);
        session.subscribe('ticker', tickerEvent);
        session.subscribe('trollbox', trollboxEvent);
}

connection.onclose = function () {
  console.log("Websocket connection closed");
}

connection.open();

In the example code there are three functions that return data however I am unsure of how to have my code respond to the data returned as these three are continually running simultaneously.

Should I place code to be executed directly within the class methods themselves or would it be better to have the class methods dump their data into a database and then have my code continually reading the database data and acting accordingly?

Thanks and apologies for the noob qn.