object-oriented analysis xtuml: shlaer-mellor - executable uml• 2002 executable uml established as...
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• Distinctives• Shlaer-Mellor xtUML• Brief History• Key Tooling Developers• Key Players• Conclusion
Outline
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• Shlaer-Mellor Method and xtUML– subject matters, separation of concerns– data, control, processing– tooling
• data modeling (Object Oriented Analysis (OOA))• state machines• action language• interpretive execution• model compilation
Distinctives
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Shlaer-Mellor xtUML
ExecutableTranslatable
Component Diagram • Allocate functionality to domains• Define Interfaces (explicit bridges)
Class Diagram • Abstractions, associations• Operations
State Diagram • Functional lifecycle• Sequencing of control
Action Specification• Processing
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2 Dimensions versus 1 Dimension
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Diagrams expose
abstractions…
vs.
…allowing us to reason about their correctness
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■ Executable, tightly coupled:— Component— Interface— Class— State— Action
■ Informal, loosely coupled— Use Case— Sequence— Communication— Activity
Capturing Intent in xtUML
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Translate Models to Target Code
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Optimized Code
Application Models Marking Data Rules & Templates
Translation Engine
CC++Java
SystemCVHDL
AUTOSAR…
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Separation of Concerns■ Subject-matter experts focus on application
— Features and capabilities— Intricacies of the application
Application Models
Model Compiler
■ Implementation experts focus on optimization— Faster, smaller— Less power— Lower cost
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Reusable IP (1): ModelsPlatform-independent Application Models
Reuse application models across platforms and device variants
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Reusable IP (2): Model Compilers
Channel ControllerSite Link MME
Reuse one model compiler across many applications.
Application-independent Model Compiler
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Summary of the Flow■ Model
— Create models that manifest specifications, clarify goals, and define interfaces
■ Execute— Explore issues— Increase understanding— Prove concepts
■ Translate— Directly generate
implementations— Conform to standards— Automate quality
■ Target— Embedded code— Virtual platforms— Deployment
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Where xtUML is Used -Embedded Systems Development
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■ Domain-specific
■ Highly heterogeneous
■ Distributed over networks
■ Highly interactive w/physical world
■ Require multiple disciplines to implement
■ Validated mainly through physical prototyping
■ System integration and test organizations are pivotal
■ Subject to rigorous quality, certification, qualification rules
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• 1988, 1991 Shlaer-Mellor Method published by Stephen Mellor and Sally Shlaer.• 1995 BridgePoint and iOOA (iUML) tooling (commercially licensed)• 2002 Executable UML established as Shlaer-Mellor OOA using UML notation.• 2004 Commercial Corporate Proprietary Licensed.• 2013 BridgePoint xtUML Editor goes open source under Apache 2.0.• 2014 all of BridgePoint goes OSS under Apache and Creative Commons.• 2015 Papyrus Industry Consortium and xtUML/BridgePoint contribution• 2015 OSS of alternate generator engine (community building)• 2016 Papyrus-xtUML (BridgePoint) Eclipse Foundation governance• 2016 OSS contributions from industry, university and individuals
History
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• Saab• UK Crown• Agilent• Ericsson• Fuji-Xerox• BAE• ...• Academia
Key Users
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• Project Technology• Cadre (Teamwork)• Kennedy Carter• Mentor Graphics• Abstract Solutions• Toyo• Aurora Consulting• Model Integration• ROX Software• One Fact
Key Development
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• method sound• body of IP driving• community growing• tooling improving
Conclusion
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Questions and Discussion
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Methodology
UML-RT (ROOM) xtUML (Shlaer-Mellor)elaborative translative
functional decomposition domain based
encapsulation relational
executable executable
abstract more abstract
architecture recognized architecture domain (MC)
fixed run-time run-time rules
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Workflow
UML-RT
1) top capsule
2) decomposition
3) messaging/protocol
4) state behavior
5) progressive refinement
6) activities
xtUML
1) domain separation
2) classes, associations and attributes
3) state behavior
4) activities
5) component deployment
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Tool Architecture
UML-RT xtUML
Papyrus-RT app
UML-RT MM UML2
Papyrus Platform
EMF GMF
Eclipse
BridgePoint app
xtUML MM
Java/SQL GEF
Eclipse