const ev = require('events');

let getResource = (arg) => {
  let e =  new ev.EventEmitter();

  process.nextTick(()=> {
    e.emit('start');
    let counter = 0;
    let timer = setInterval(() => {
      e.emit('data',++counter);
      if (counter === 3) {
        e.emit('end', "I'm done");
        clearInterval(timer);
      }
    },500);

  });
  return e;
}

let client = getResource();

client.on('start', () => {
   console.log('starting');
});

client.on('data', (d) => {
  console.log(d);
});

client.on('end', (msg)=> {
  console.log(msg);
});