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Cade's Component Diagrams

 
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I wonder if I am interpeting Cade's component diagrams for the example assignment correctly.
I think he is depicting the Front Controller pattern yet has made the JSP components dependant on the controller component because, I assume, they invoke the controller via user's interactions. The strange thing about this though is that the Controller is supposed to invoke (display) the JSPs.
I would really appreciate it if someone would explain the motivation behind this layout, it seems counter-intuitive to me.
Also, in Cade's sequence diagrams, sometimes the Customer sends message to the controler (via HTTP) and sometimes JSPs are invoking the controller - what's that all about? And, I say I think that he is depicting a Front Controler because its the most stripped down strategy for Controler possible - no Business Helpers, Application Controlers, View Helpers etc.
Could someone wise to the ways of pleasing the assignment examiners tell me if I am unwise to be depicting something more elaborate than what I find in Cade's example?
I'm getting close to completing my assignment for about the third time and it disturbs me that I can't comfortably interpret Cade's example. Why is it that I don't get similarly confused when looking at, for example, Core J2EE Patterns or other J2EE patterns texts?
 
Sean Walker
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Hmmm. How to interpret this silence...
Well, anyway, I'm scheduled to take the part III 'exam' tomorrow, I'll guess I should know soon enough whether or not I needed to ask a question about this.
 
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