At 6:40 AM -0700 7/29/05, Carl Smith wrote:
Struts privide strong C (of MVC) components, tyical of which are
ActionServlet, Actions and RequestProcessors, but I am wondering
which part is the M (of MVC).
Struts does not provide any part of the "M" (Model). I think this is
what often leads new developers to put too much model-type code
directly into Action classes.
The idea is that you somehow make your model available to Struts,
most often through the Servlet Application Context, or perhaps
through a JNDI service, and then actions look up your model classes
and perform operations on them.
So, you can use Struts PlugIn class to trigger some initialization of
the servlet context at startup time, although if you are using
Servlet 2.3 or newer, there's not too much reason not to just use a
ServletContextListener (unless you are using Struts "modules" feature
and your initialization code needs to know which module it's part of.)
For the last 18 months or so, the Spring Framework has been my
favorite tool for assembling model components and making them
available in the application context. Spring includes quite a bit of
direct support for Struts which makes this pretty easy to do.
Of course, Spring itself is also not the "M" in "MVC" -- we just use
it to instantiate and initialize the service providers of our model
layer.
Hope this helps.
Joe
--
Joe Germuska
[EMAIL PROTECTED]
http://blog.germuska.com
"Narrow minds are weapons made for mass destruction" -The Ex
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