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From Guido Casper <>
Subject Re: [RT] Use of flowscript or the pyramid of contracts (was Re: [RT] Checked exceptions considered harmful)
Date Mon, 19 Apr 2004 18:38:40 GMT
Tim Olson wrote:
>>>Yes, we habe FOM. The difference to the sitemap is that the sitemap 
>>>enforces the contract while flow doesn't.
>>One drastic approach would be to stop flow from being able to access 
>>java at all, if not thru FOM. I would be in favor of that 
>>once we have 
>>the real block system running, but at that point it might 
>>well be too late.
> we already have a nice system of flow helper methods to access entity beans
> and pump them into XML.  we use flow to select which components are needed
> when, and the contract with our GUI designers is XML.  we were already burnt
> quite badly when sendPage() became a requirement, since we were using flow
> to merely select actions and the sitemap had all of our branching.  we are
> now unable to upgrade past 2.1.2 without major refactoring which honestly we
> can't afford to do.
> you theoreticians seem all too willing to break production systems to
> enforce your latest notion of best practices.

Tim, don't take the word for everything said in a RT thread and don't 
worry that access to Java will be disabled in the 2.x branch (if ever) 
as this certainly would break any production system running on with flow.


Guido Casper
S&N AG, Competence Center Open Source
                     Tel.: +49-5251-1581-87
Klingenderstr. 5
D-33100 Paderborn

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