[Webware-discuss] Does Webware have a dispatch model?

[Keith F I. <kir...@ho...>]

One of the things I like best about the whole Java Servlet/JSP stuff is
the dispatcher model.  I like to load up request handlers keyed by a URL
parameter, fire off the handler and get a "page" back, and then
dispatcht to that page.

something like:

from MyHandlers import *

def awake(self, trans):  # evoked once per load into appserver?
	self.commands  = {}
	self.commands["home"] = MyHandlers.Home()
	self.commands["add"] = MyHandlers.AddItem()
	..... (and many more)

def respond(self, trans):
	request = trans.request()
	cmd = request.field('cmd')
	page = self.commands[cmd].execute()
	page.render()


Something like that, anyway.  The idea here is that instead of having a
servlet for every page, I can have one servlet which, depending on the
results of my business logic, can "redirect" (or in this case, return
the appropriate response/presentation page).

For instance, if, when I try to add an "item," something goes wrong, I
can hand back the "add form" page, or an "error" page, or some other
thing, depending.

What would really be cool is if I can use the "WebKit.Page" object (and
descendents) for this sort of thing.  When I tried it, though, it didn't
work.  I can use the Redirect method to call another servlet existing in
another file, which I don't want to have to do.  I tried importing a
"WebKit.Page" derived subclass, and calling its .writePart() methods,
but got an "AttributeError: HomePage instance has no attribute
'_response'" error.

Given all this context, can I use the Page classes for this sort of
thing?

Keith