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Sequence Diagrams - suggestion needed

 
Sanz Vai
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Trying to start sequence diagram, but having problems with starting ...

1. What should be the starting point of seq. diagram? Is it User, Form/JSP or Controller?
2. If it is User, there are 2 different types of Form to deal with Web/JSP and Java/Swing and also 2 different Controllers for Web and Swing. How do we show this in the same diagram?
 
Ramon Gill
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Sanz,
1. I would choose user (i.e. an 'actor'), although I've seen diagrams that use objects (i.e. a JSP). You need to pick something that represents an input to your system.

2. Use different diagrams for the different controllers. Keep sequence diagrams as simple as possible.

Ray
SCJP, SCWCD, SCBCD, SCEA (part-1), IBM-484, IBM-486
 
Sanz Vai
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1. How many use cases do we need to do? 4 or 7?
2. Controller component contains the same flow for all Use cases, so can it be shown as a separate sub-system?
 
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