require('async-session');

var counter = 0;
setInterval(function () {
    counter++;

    global.session = {
        myProperty: 'counter = ' + counter
    };
    setTimeout(function () {
        console.log(global.session.myProperty);
    }, 5000);

}, 1000);

/*
 will print:
 counter = 1
 counter = 2
 counter = 3
 ...
*/