In JSF - what is the MVC?

[avihai marchiano]

Hey,

In the JSF framework , what is the MVC?

I dont understand why the backbean are cosider as the model they couple to the view.
change in them will required change in the view.

Thank you

[Ulf Dittmer]

Some good explanations of the MVC principle, and how it relates to Java web apps, can be found at http://faq.javaranch.com/java/Model1Model2MVC and http://www.javaranch.com/journal/200603/Journal200603.jsp#a5

[Tim Holloway]

Originally posted by avihai marchiano:

change in them will required change in the view.

That's pretty much true anyway. After all, the View is a display of the Model.

JSF is about the purest implementation of MVC you'll find for J2EE. No web-based application can be 100% pure MVC, since in true MVC, changes in the model should be postable back to the view, and HTTP protocols don't allow a server to send unsolicited data, though you can fake it with AJAX or timed page refresh.

But aside from that limitation, JSF backing beans contain only a small amount of Controller code, if any. The Controller is almost entirely in JSF tags and in the JSF infrastructure.

So it's pretty close.