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Download e-book for iPad: DZone Refcardz Getting Started with Ajax by By Dave Crane

By By Dave Crane

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36 2. 10 The Pong RTM after adding use cases Now we can create a use case diagram illustrating the interactions between the actors and the use cases. In the Pong example, we can also show a generalization from the Player actor to the Left Player and Right Player actors. 11 shows the Pong use case diagram. 11 The Pong use case diagram Integrating the UML and Game Development Each use case needs a use case scenario that specifies the steps required for completion of a use case. 12 as an example. It shows the use case scenario “UC1_Player Wins Game” from the Pong example.

In the use case diagram, actors are depicted as stick figures, and a use case is drawn as an ellipse. 1 shows a sample use case diagram. 1 A sample use case diagram The diagram might look wonderful, but it really doesn’t have any meaning other than to provide a clear definition of the actors and the use cases they interact with. In reality, a use case is not complete without a corresponding use case scenario. The use case scenario describes the steps required for the completion of a use case. There is no standard format for use case scenarios, but they generally include the following items: The Unified Modeling Language Item Description Use case name The name of the use case Overview A high-level description of the use case Primary scenario The primary steps required for completion of the use case Alternative scenarios Alternative steps that might occur during the execution of a use case Exceptions Any failure conditions that might occur and how the software should respond Although the UML does not have a specific naming convention for use cases, it typically is a good idea to create a specific format.

In reality, a use case is not complete without a corresponding use case scenario. The use case scenario describes the steps required for the completion of a use case. There is no standard format for use case scenarios, but they generally include the following items: The Unified Modeling Language Item Description Use case name The name of the use case Overview A high-level description of the use case Primary scenario The primary steps required for completion of the use case Alternative scenarios Alternative steps that might occur during the execution of a use case Exceptions Any failure conditions that might occur and how the software should respond Although the UML does not have a specific naming convention for use cases, it typically is a good idea to create a specific format.

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DZone Refcardz Getting Started with Ajax by By Dave Crane


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