On Fri, 17 Aug 2012 20:40:59 -0300, Jay Ginete <killer.tila...@gmail.com>
wrote:
I have always thought that Tapestry5 was classified as a
"Compontent-oriented" web framework and not as "MVC" web framework.
Tapestry 5 is definetely a component-oriented framework. Whether it is
also MVC or not depends on the meaning you give to the term MVC. It seems
you're considering MVC as the same as request-oriented. I don't think that
way.
According to Wikipedia and its sources, "Model–View–Controller (MVC) is a
type of computer user interface that separates the representation of
information from the user's interaction with it.[1][2] The model consists
of application data and business rules, and the controller mediates input,
converting it to commands for the model or view.[3] A view can be any
output representation of data, such as a chart or a diagram. Multiple
views of the same data are possible, such as a pie chart for management
and a tabular view for accountants. The central idea behind MVC is code
reusability and separation of concerns."
(http://en.wikipedia.org/wiki/Model–view–controller) I think Tapestry fits
in this description, even considering it itself doesn't implement business
rules, just uses them. In other words, it can be used to implement the V
and the C. And some components, by themselves, are implemented following
the MVC pattern.
I tend to think that each page in a Tapestry5 app is a single stand
alone app that has components within it that respond to events. I even
sometimes think of Tapestry5 apps as RIA without the "R" if you use the
"zone" component in almost (or all) of your use cases.
As far as I know (and I may be completely wrong, as always), the term RIA
is usually used in the sense that view logic is placed mostly in the
client, not in the server. Here's the Wikipedia definition: "A Rich
Internet Application (RIA) is a Web application that has many of the
characteristics of desktop application software, typically delivered by
way of a site-specific browser, a browser plug-in, an independent sandbox,
extensive use of JavaScript, or a virtual machine.[1] Adobe Flash, JavaFX,
and Microsoft Silverlight are currently the three most common
platforms,...". Tapestry can be used to create RIAs, but I wouldn't
consider itself a RIA. In the Java world, I'd consider the single page
frameworks RIAs: GWT, Vaadin, Echo2, Echo3, etc.
PS: I love tilapia (the fish). It's sold and eaten a lot in Capitólio,
Minas Gerais, Brazil, where I grew up. :)
--
Thiago H. de Paula Figueiredo
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