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Java Intro to Java Web Development with Spark Bells and Whistles Adding to and Iterating a List

Sergei Makarov
Sergei Makarov
12,718 Points

MVC Pattern. Who is who in Spark?

So, please correct me, if I am not right.

Model - "[..] stores data, that is retrieved according to commands from the controller and displayed in the view."

View - "[..] generates an output presentation to the user based on changes in the model."

Controller - "[..] can send commands to the model to update the model's state (can also be associated to change the view's presentation of the model)."

I believe, i could associate it follows:

Model is concatenated with View through ModelAndView.class; Model we can present as Java Collections Framework (e.g. Map);

View is all that will be parsed of HandlebarsTemplateEngine.class (I mean in this case, as I reference to this very course (html, css ans so on);

What is then a Controller? JavaScript? REST API? Both?

Thank you for your answers.

1 Answer

Craig Dennis
Craig Dennis
Treehouse Teacher

Hi Sergei Makarov , great question!!

Yeah in our situation the "routes" the lambda that starts with(req, res) is our controller. It is responsible for controlling the flow and filling out the model (any object) which is used to push into our view (our html, currently rendered by HandleBars, but could be anything).

That help clear things up?

Sergei Makarov
Sergei Makarov
12,718 Points

Yep. Thank you for your answer, Craig!

You have mentioned also a Spring Basics course to my previous question. Good to know. Go there after this!