Is this separation of content and logic?

jmDesktop · May 20, 2008

I have this from javapassion.com:

<html>
<body>
hello world!
<br>
Current time is: <%= new java.util.Date() %>
</body>
</html>

Is this "model 2 architecture"? I did not think it was, but don't
know, which is why I am asking. If it is I'm not sure I know what
"logic" is in the mvc context. For the trivial this might be okay,
but not larger systems, imho.

Dave Miller · May 20, 2008

jmDesktop said:
I have this from javapassion.com:

<html>
<body>
hello world!
<br>
Current time is: <%= new java.util.Date() %>
</body>
</html>

Is this "model 2 architecture"? I did not think it was, but don't
know, which is why I am asking. If it is I'm not sure I know what
"logic" is in the mvc context. For the trivial this might be okay,
but not larger systems, imho.

This page might help explain model - view - controller (mvc) architecture:

http://en.wikipedia.org/wiki/Model-view-controller

Arne Vajhøj · May 20, 2008

jmDesktop said:
I have this from javapassion.com:

<html>
<body>
hello world!
<br>
Current time is: <%= new java.util.Date() %>
</body>
</html>

Is this "model 2 architecture"? I did not think it was, but don't
know, which is why I am asking.

It is not.

In MVC m2 the controller servlet or a class called from it would
store a value in the request object and the JSP page would display
that using EL.

Arne

Tom Anderson · May 21, 2008

I have this from javapassion.com:

<html>
<body>
hello world!
<br>
Current time is: <%= new java.util.Date() %>
</body>
</html>

Is this "model 2 architecture"? I did not think it was, but don't know,
which is why I am asking. If it is I'm not sure I know what "logic" is
in the mvc context. For the trivial this might be okay, but not larger
systems, imho.

It's an example that's so trivial that it's hard to classify it either
way. If working out the date involved contacting a database and doing some
calculations (IOW, if we were talking about enterprise-grade dates), and
that logic was spelled out here, this would be Model 1. If, on the other
hand, that logic was in the Date constructor, this would actually be Model
2.

Isn't there also some distinction about control flow, with Model 2 having
a master servlet receive all requests and then dispatch them to an
appropriate handler JSP?

tom

Arne Vajhøj · May 21, 2008

Tom said:
Isn't there also some distinction about control flow, with Model 2
having a master servlet receive all requests and then dispatch them to
an appropriate handler JSP?

That is the difference between model 1 and 2.

http://java.sun.com/developer/technicalArticles/javaserverpages/servlets_jsp/
http://www.javaworld.com/javaworld/jw-12-1999/jw-12-ssj-jspmvc.html

Arne

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Is this separation of content and logic?

jmDesktop

Dave Miller

Arne Vajhøj

Tom Anderson

Arne Vajhøj

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