node.js event emitter example

var events = require('events');


function callSomething(){
    var eventEmitter = new events.EventEmitter();

    console.log("Method called");

    eventEmitter.emit("data", "Hello immediately (you will never see this message)");

    setTimeout(function (){
        eventEmitter.emit("data", "Hello from 1 second later");
    }, 1000);

    setTimeout(function (){
        eventEmitter.emit("data", "Hello from 2 seconds later");
    }, 2000);

    setTimeout(function (){
        eventEmitter.emit("error", "Some error");
    }, 3000);

    return eventEmitter;
}



var result = callSomething();

result.on("data", function(data){
    console.log(data);
})

result.on("error", function(data){
    console.log("Error: " + data);
})