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Sequence diagrams: notation in chapter 9 (Howard Sheil)

Carl Wauters
Greenhorn

Joined: Aug 02, 2007
Posts: 19
Dear forum users,

This is a question for everyone who already passed the SCEA exam and based their assignment on the example that was given in the famous chapter 9 from Howard Sheil's book. I would like to know if you used the same kind of arrows as well. For me, it's a bit strange that author uses asynchronous arrows (->) all the time (in both directions) It's not really obvious to me to see the distinction between synchronous and real asynchronous (e.g. the message to the mail server) messages that way, and - IMHO - this is an important aspect in the sequence diagrams.

Thank you very much for your answers.


SCJP 5.0, SCWCD 1.4, SCBCD 5.0, SCJD, SCDJWS 5.0, SCEA/OCMJEA 5
Jari Timonen
Ranch Hand

Joined: Jan 16, 2004
Posts: 230

Lot's of other issues as well:
http://www.coderanch.com/how-to/java/CadeSheilSceaFaq

I'm doing part 2 also and I am NOT going to "copy-paste" UML notation errors to my diagrams.


SCJP 5.0, SCJD URLyBird 1.3.3, OCMJEA 5 (SCEA) Factory Homes
Carl Wauters
Greenhorn

Joined: Aug 02, 2007
Posts: 19
Thank you for your reply, Jari. Good luck with part 2!
Jeanne Boyarsky
internet detective
Marshal

Joined: May 26, 2003
Posts: 30050
    
149

Carl,
I added yours to the wiki page. And I most certainly did not use async arrows for synchronous calls in my submission!


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Carl Wauters
Greenhorn

Joined: Aug 02, 2007
Posts: 19
Thanks for your reply, Jeanne. Something tells me to make some changes in my diagrams
 
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