spring-websocket-stomp/www/amp.js

var stompClient = null;

function connect() {
    
    var socket = new SockJS('http://localhost:8081/amp/websocket');
    stompClient = Stomp.over(socket);
    
    stompClient.connect({}, function (frame) {
        console.log('Connected: ' + frame);
        stompClient.subscribe('/public/transactions', function (msg) {
            var msgJ = JSON.parse(msg.body);
            console.log('/public/transactions', msgJ);
        });
        stompClient.subscribe('/channel/transactions', function (msg) {
            var msgJ = JSON.parse(msg.body);
            console.log('/channel/transactions', msgJ);
        });
    });
   
}

function disconnect() {
    if (stompClient !== null) {
        stompClient.disconnect();
    }
    setConnected(false);
    console.log("Disconnected");
}

$(document).ready(function() {
    connect();
});