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Failed SCEA II - Class & Component diagram

jigar solanki

Joined: Nov 01, 2011
Posts: 1

I took SCEA Part II & III but failed Assignment part by 4 marks.
I got below mentioned comments.

1) Class Diagram Incomplete - Could anyone tell me exactly what all details we need to mention in the class diagram. I have removed business domain model classes like separate product classes and created one general class. as per other post this might be one of the reasons. please confirm. Also I have not included any controller or EJB or DAO classes. I have added them in component diagrams though. So should i include this type of classes also in Class Diagram?

2) Component Diagram - Confusing depiction & Some interfaces have been wrongly defined.
- I have only used dependency arrows in whole Component diagram and not used socket - bubble interface types. Can this be a reason for above mentioned comment. I have clearly mentioned all the components in separate layers. Also i am not using dao for communication with external system and got comment that DAO should be used for external system communication.

3) Sequence diagram - More details required for a few class diagram
- Please tell me how to show that one sequence diagram calls other sequence diagram. Because in my case i have to show that one sequence diagram calls other one to complete the mentioned use case.

Please clarify my above mentioned doubts so that i can resubmit my assignment asap.

Thanks & Regards,
Jigar Solanki

Will Myers
Ranch Hand

Joined: Aug 05, 2009
Posts: 343

1) It sounds like you removed all the relevant classes, I'm not sure what would be left! I included EJBs, controllers, DAOs (to external systems not database), and the full domain model given in the assignment as well as all the JSP/JSF components (single controller for all).
2) Again, I used DAOs for external communication
3) I treated each use case as a seperate stand alone diagram, some parts are repeated on multiple diagrams.
Pandhari Shetkar

Joined: May 12, 2011
Posts: 20
I agree with Will Myers on all three points. I did the same in my assignment
jianming chen
Ranch Hand

Joined: Jul 21, 2009
Posts: 33
I extracted a piece of common process into separate sequence diagram to reduce clutter. And used a comment box to describe the reference.

I have all the jsps, managed beans, daos, and entities in the class diagram.
gekko kamen

Joined: Nov 06, 2011
Posts: 8

1) I did the same that Jigar in the Class diagram; I use a generic class to represent a group of classes of the domain model. I think this approach is ok, because the system will grow up, and I don't want to add new classes and make a new deployment when a new "Type" of "Something" is added.
Am I right? or is the intention of this Class diagram to represent exactly the same entities as in the "Domain Model" provided, but with attributes and navigation specified?

2. If I made a class diagram framework agnostic, as suggested in Cade & Sheil book, the sequence and component diagram should be also framework agnostic? would be better to specify the frameworks I will use in these diagrams?

Please, give me your oppinions, I have to send my resubmition and not so much time left.

thanks to all.
Thomas Felix

Joined: Oct 27, 2011
Posts: 13
I failed in Deployment diagram. Need to resubmit it.

I need to make jar with updated deployment diagram only?
Or with other old diagram and new deployment diagram?

With regards,
Thomas T
Ranganathan Kaliyur Mannar

Joined: Oct 16, 2003
Posts: 1097

jigar solanki wrote:
Also I have not included any controller or EJB or DAO classes. I have added them in component diagrams though. So should i include this type of classes also in Class Diagram?

The only class that was not included in my class Diagram, but was present in my Component diagram was the EntityManager (JPA). All other classes were included. In the component diagram, there is no information about the methods. The only place you can show them is the class diagram. Also, whatever methods you refer in the sequence diagrams should be shown in the class diagram. That will also be a disconnect if not shown.

gekko kamen

Joined: Nov 06, 2011
Posts: 8
hi Thomas,

To be sure, I guess it is better to ask to

I have to do a resubmition too. And I want to know if you are using a methodology to estimate the hardware resources that you need. I'm a little confused about what they expect to view in the Deployment diagram.

good luck.
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