How do actions in components get defined and triggered?

Forgive me if this has been answered elsewhere or if I’m not finding it in the documentation, but how are actions defined in components now triggered?

In pre-component fashion I could just bind an action to any HTML element and then define it in a controller.

// hbs
<h3>Something awesome will happen when you click here</h3>
<div {{action "doSomething"}}>Do something when clicked</div>
// controller
...
actions: {
  doSomething (){
    //Something spectacular!
  }
}
...

I can’t seem to figure out how to do something similar with components.

Let’s say, I’ve extracted what was in the .hbs and put it into a component

// component hbs
<h3>Something awesome will happen when you click here</h3>
<div {{action "doSomething"}}>Do something when clicked</div>

And all I want to do is transition to a different route from where the current component is used. Where does the action need to be defined and/or what is the pattern to define actions? Let’s assume that the component is a child component of another component.

I was able to figure it out. @emberigniter’s article on http://emberigniter.com/send-action-does-not-fire/ and the diagram under the section for routing in this article helped tremendously http://emberigniter.com/5-essential-ember-2.0-concepts/