IBM Rational Rhapsody family provides a collaborative design, development and test environment for systems engineers and software engineers. It uses Systems Modeling Language (SysML) and Unified Modeling Language (UML) to enable rapid requirements analysis and visual, model-based design.
The UML diagrams are views into the underlying semantic system model; each kind of diagram emphasizes some aspect of the model.
Example - Dynamic aspects is represented by behavior diagram - State chart.
Statecharts define the behavior of objects by specifying how they react to events or operations. The reaction can be to perform a transition between states and possibly to execute some actions. When running in animation mode, IBM Rational Rhapsody highlights the transitions between states.
The discussion covers few modeling challenges with state chart using Rational Rhapsody and how to over come those challenges:
1) Evaluation of condition connector in state chart
A scenario where a variable (count) is decremented before the condition connector and is expected to terminate if value of variable is 9 (count==9).
However, on executing you observe that the condition doesn’t take the change in the variable on the transition. Instead it takes the initial value of the variable for comparison.
The work around here is to have an additional dummy state in between to get the desired output.
2) Multicasting with rapid ports in layered structure
Currently, the multicasts of event via rapid ports (ports that have no provided/required interfaces) are supported only from a direct invocation.
Example - One sender object and two receiver objects
Consider a scenario where the event is first sent from the Class A's object(itsA) and then it reaches the Class B's object(itsB), from where it is delegated to its 2 inner parts(itsB1 and itsB2
No multicasting is available on having multi layered structure.
The Workaround is to add an additional state chart and MULITCAST_GEN() macro in class B.
3) Working of Reaction in State
In a single state for a Reactive class, you would expect to continuously print a statement after elapse time of tm (1000). However, upon execution it prints only once instead of continuous timer.
Using a tm (1000) as a trigger for a reaction in state means that 1 second after you enter the state you'll be triggered. It's not a continuous timer.
To restart the timer you have to exit the state and re-enter it. It needs a design change as below.
4) Combining Junction Connector and Condition Connector in a state chart
You would like to have several events from a state and a condition to determine the other state.
You cannot join several transitions into a condition connector neither you can have a transition from a junction connector to a condition connector.
However, you can model to add a dummy state in between that will further evaluate for condition connector.
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OSLC linking in IBM Rational Design Manager 4.0 with Rational Rhapsody and DOORS- In this demonstration you see how to create a link in the Design Manager v4.0 web interface from a Rhapsody model element to a DOORS requirement.
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IBM Rational Software Architect and IBM Rational Rhapsody have been extended with new Collaborative Design Management capabilities released last week, enabling teams to collaborate on their software and systems designs and integrating design into the lifecycle.
From a support perspective, we wanted to highlight some of the key areas to find more information on these features. For technotes and other support generated content, you will be able to find Rational Software Architect Design Manager and Rational Rhapsody Design Manager documents in the respective Support Portal family pages for Software Architect and Rhapsody:
For even more information, the following three links will take you to the respective locations on Jazz.net and developerWorks:
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I'm constantly amazed at the great information our developerWorks authors produce on such a consistent basis. To prove that point, here are the latest articles from the past week that have gone live on developerWorks Rational:
Develop reliable software with DevOps
Top 10 modeling hints: #7 Requirements models help you avoid early and expensive defects
A macro-pattern for public sector systems architecture
JazzHub: Collborate in the cloud in less than 10 minutes
What's new in IBM Rational Application Developer V9.0 Portal Tools
Top 10 modeling hints: #8 Napkin models are a good way to start a conversation, but a terrible way to end one
Homo Sapiens are not the only intelligent ones.. IBM Rational Rhapsody seems to be enhancing its ‘thinking’ capabilities with the introduction of version 8.0.5.
Here again intelligence of Rational Rhapsody 8.0.5 can be observed, the ControlFlow automatically gets converted to an ObjectFlow when an ‘Action' is connected to an ‘Object Node’: