Basics of RSA - To Create UML Diagrams

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Basics of RSA

Rational Software Architect


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What is RSA?

Comprehensive Modeling and Development

environment that leverages the Unified

Modeling Language (UML) for designing

architecture for C++ and Java 2 Enterprise

Edition (J2EE) applications and web services

Is built on the Eclipse open-source software

framework


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Model

A model is a complete description of the

system from a particular perspective.


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What do we learn today?

Use case modeling

Activity Diagrams

Sequence Diagrams


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Workbench

The termworkbench

refers to the

desktopdevelopment

environment

used in RSA


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Creation of a new project


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Select UML project


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Project name of your choice


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Change the file name accordingly


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Default diagram can be a use case diagram, activity diagram or just a

freeform diagram


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Workbench looks like this after you create your first project


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Use case diagrams


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Use Case Model Basics

User centric

Actor- represents anything external to the

system that will interact with the system Actor represents a role that a user plays

Each actor uses the system in different ways

Each way the actor uses the system is a usecase


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Contd

Use Case is initiated by an actor and describes

transactions offered by the system

Use case representswhat

the system mustprovide rather than how

Scenario is a session that an actor has with

the system

Use cases represent a set of potential

scenarios


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Relationships

Include and extendGeneralization


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Activity Diagrams


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Activity Diagram Basics


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Sequence Diagrams


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Sequence Diagrams Basics

Lifelines represent either roles or objectinstances that participate in the sequence

being modeled

The message that is being sent to the

receiving object represents an

operation/method that the receiving object's

class implements


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A synchronous message is used when the

sender waits until the receiver has finished

processing the message, only then does thecaller continue

A closed and filled arrowhead signifies that

the message is sent synchronously With an asynchronous message, the sender

does not wait for the receiver to finish

processing the message An open arrowhead is used to indicate that a

message is sent asynchronously


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Alternatives are used to designate a mutually

exclusive choice between two or more message

sequences


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The option combination fragment is used to model a

sequence that, given a certain condition, will occur;

otherwise, the sequence does not occur. An option is used to

model a simple "if then" statement


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Examples of Use Case Diagrams


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Examples of Use Case Diagrams


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Examples of Sequence Diagrams


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Examples of Activity Diagrams


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Basics of RSA - To Create UML Diagrams

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