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From Christopher Oliver <>
Subject Re: [RANT] The Flow...
Date Wed, 05 Mar 2003 07:29:13 GMT
Pier Fumagalli wrote:
> Back to the drawing board, my fellow IDL editor at hands, and I start doing
> one weird thing: converting the flow object model into IDL, as the current
> JavaDOC output of JSCocoon and friends doesn't look "easy and nice",
> preventing me to visually see if it's an implementation problem (all those
> jsGet_whatever, jsSet_Something and jsFunction_Yadayada are making me go
> nuts) or a more important and radical _design_ problem.
> Let me tell you one thing, after I wrote a couple of IDL interfaces, it
> started to come out... It looks like there is no whatsoever OO-design behind
> the flow object model, and that's the same feeling you get when you take
> MSIE and try to make sense of its Jscript stuff.

I don't think its quite as bad as you make out. The intended public 
interface of Ovidiu's design is really quite simple and elegant. The 
problem is that a lot of the apparent "interfaces" in are 
really implementation details. Here is a pseudo-idl depiction of the 
"real" public interface (Ovidiu, correct me if I'm wrong):

interface Cocoon {

   readonly attribute request;

   void createSession();

   void removeSession();

   void sendPageAndWait(in string uri, in Object bean,
                        in int timeToLive);

   void sendPage(in string uri, in Object bean, in int timeToLive);

   boolean process(in string uri, in Object object,
                   in OutputStream stream);


Note that sendPage*() are actually global functions (but I think they 
can and should be operations of Cocoon like "process()").

With the exception of the Input/Output module stuff, "load()" (which I 
can now confirm doesn't actually work), XMLForm, and the Database stuff 
(and I think we can all agree these should be removed or moved 
elsewhere), the other stuff is just there to support the implementation 
of sendPage*().


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