Lukas Moser

It works as you say. And I think now, that actors are allowed in sequence diagrams.

Thank you!!!

I wonder what the left most 'item/symbol/object' has to be to start the diagram with.

In 'Sun Certified Enterprise Architect for J2EE Technology' by Mark Cade the sequence diagrams start with an actor. However I belive that this does not conform to UML 2.0.

StarUML - that I use to draw the diagrams - does not support to have an actor and it is not possible to draw the first arrow without starting from an object.

What is the correct way to draw the first arrow?

Thank you very much for your help!

Hi Meng Yi,

Did you keep the sequence diagrams consitent with the component diagrams? Did you use components of the component diagram only or additional classes?

Thank you.

Lukas

Paragraph sequence diagrams in the case study, chapter 8 (Sun Certified Enterprise Architect for J2EE Technology) by Mark Cade.

Quotation:

Sequence diagrams at the architectural level structure the components and dicate a flow of events through the components. These diagrams are not using classes or objects, but components to provide the developer with some guidelines for developing a detailed design of the system.

The sequence diagrams show ValueObjects that are not shown (and do not have to be shown?) in the class or component diagram. This seems to contractict the quotation above.
Is it ok to show objects (in this case ValueObjects) in the sequence diagram. Will I loose points if I do or will I loose points if I do not?

Did anybody get a good grade with very similar sequence diagrams?

The component diagrams in the case study, chapter 8 (Sun Certified Enterprise Architect for J2EE Technology) by Mark Cade look rather simple.
E.g. they do not use any EntityBeans at all. Instead, DAOs are used.

Of the well known presentation tier patterns only a controller is used. Intercepting Filter, View Helper etc are not used.

Is it possible to pass the assignment in this way.
Is there anybody who passed with very similar component diagrams?

Originally posted by air lulu:
do you have document the assumption?

Yes, I documented the assumptions, however in a rather short form.
The document including all diagrams is only 13 pages.

Grade: F
Score: 60
Comment: This report shows the total points that could have been awarded in each section and the actual amount of points you were awarded. This information is provided in order to give you feedback on your relative strengths on a section basis. The maximum number of points you could have received is 100, minimum to pass is 70.
Class Diagram (44 maximum) ............................... 34
Component Diagram (44 maximum) ........................... 23
Sequence/Colloboration Diagrams (12 maximum) ............. 3

I followed closely the case study by Mark Cade (Sun Certified Enterprise Architect for J2EE Technology - Study Guide)

The class diagramm is not too difficult and i am able to improof it.

The component diagrams in this study guilde look very simple
(<<JSP>>Form - <<servlet>>Controller - <<SLSB>>Processor - DAO).
Obvioulsy this is *not* (or not enough) what Sun expects.

As for the sequence diagrams, i don't understand the poor score not at all. It was much more work than the class diagram.

Please help me, i am desperate...

Thank you!