The State Machine Compiler
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SMC takes a state machine stored in a .sm file and generates a State pattern in fourteen programming languages (C, C++, C#, [incr Tcl], Groovy, Java, Lua, Objective-C, Perl, PHP, Python, Ruby, Scala, VB.net). Includes: default transitions, transition args, transition guards, push/pop transitions and Entry/Exit actions. See all details on http://smc.sourceforge.net/.
![Transition Guards
// State
Idle
{
// Trans
Run
// Guard condition
[ctxt.isValid()]
// Next State
Running
// Actions
{
StopTimer("Idle");
DoWork();
}
Run Idle { RejectRequest(); }
}
fperrad@OSDC.fr2009](https://image.slidesharecdn.com/smc-091005133906-phpapp01/85/The-State-Machine-Compiler-12-320.jpg)
![Transition Arguments
// State
Idle
{
// Transition
Run(msg: const Message&)
// Guard condition
[msg.isValid()]
// Next State
Running
// Actions
{
StopTimer("Idle");
DoWork(msg);
}
Run(msg: const Message&)
// Next State Actions
Idle { RejectRequest(msg); }
}
fperrad@OSDC.fr2009](https://image.slidesharecdn.com/smc-091005133906-phpapp01/85/The-State-Machine-Compiler-13-320.jpg)
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The State Machine Compiler
- 1. SMC The State Machine Compiler (40 ’) François Perrad [email protected] [email protected]
- 2. The State Machine Compiler Introduction Basic concepts Advanced concepts More features A case study : a Telephone Conclusion [email protected]
- 3. FSM are everywhere FSM : Finite State Machine Not a new technology Strong theorical base Reactive systems / Transformational systems Event driven Applications : Telephones, automobiles, communication networks, avionic systems, man-machine interface [email protected]
- 4. FSM graphical view Moore Mealy Grafcet UML = Harel statechart [email protected]
- 5. A SourceForge project Some facts : registered in 2000 ~500 downloads / month ~100 bugs (closed) written in Java mature codebase well documented 3 developers Licence MPL See : http://www.ohloh.net/projects/7339?p=SMC [email protected]
- 6. The State Machine Compiler Introduction Basic concepts Advanced concepts More features A case study : a Telephone Conclusion [email protected]
- 7. A Compiler A input source .sm (yacc-like syntax) A output source (readable) in your language Currently 14 target languages : C, C++, C#, Groovy, Java, Lua, Objective-C, Perl, PHP, Python, Ruby, Scala, Tcl and VB.net An Object Oriented design : your class has a member which is the FSM generated class A small RunTime Library Parser & Lexer of SMC are written with SMC The root of SMC is ATN (Augmented Transition Network) Robert C. Martin (uncle bob) is the author of the initial SMC implementation [email protected]
- 8. A Simple Transition // State Idle { // Trans Next State Actions Run Running {} } [email protected]
- 9. A Reflexive Transition // State Idle { // Trans Next State Actions Timeout Idle {} } [email protected]
- 10. A Internal Event // State Idle { // Trans Next State Actions Timeout nil {} } [email protected]
- 11. A Transition with Actions // State Idle { // Trans Run // Next State Running // Actions { StopTimer("Idle"); DoWork(); } } [email protected]
- 12. Transition Guards // State Idle { // Trans Run // Guard condition [ctxt.isValid()] // Next State Running // Actions { StopTimer("Idle"); DoWork(); } Run Idle { RejectRequest(); } } [email protected]
- 13. Transition Arguments // State Idle { // Transition Run(msg: const Message&) // Guard condition [msg.isValid()] // Next State Running // Actions { StopTimer("Idle"); DoWork(msg); } Run(msg: const Message&) // Next State Actions Idle { RejectRequest(msg); } } [email protected]
- 14. Entry and Exit Actions // State Idle Entry { StartTimer("Idle", 1); CheckQueue(); } Exit { StopTimer("Idle"); } { // Transitions } [email protected]
- 15. the State Machine Compiler Introduction Basic concepts Advanced concepts More features A case study : a Telephone Conclusion [email protected]
- 16. Advanced Features Map : state container only one level (multiple with UML) Push/Pop with stack context see UML History Default state factorisation of common behavior in a map No concurrency (ie //) [email protected]
- 18. the State Machine Compiler Introduction Basic concepts Advanced concepts More features A case study : a Telephone Conclusion [email protected]
- 19. More features Event management is yours Graphviz output generation HTML table generation Dynamic trace Namespace support Reflection/Introspection (for MMI) [email protected]
- 21. the State Machine Compiler Introduction Basic concepts Advanced concepts More Features A case study : a Telephone Conclusion [email protected]
- 22. A Telephone Go to the WEB Play with the demo (Applet Java) @ http://smc.sourceforge.net/SmcDemo.htm [email protected]
- 23. the State Machine Compiler Introduction Basic concepts Advanced concepts More Features A case study : a Telephone Conclusion [email protected]
- 24. all contributions welcomed Eclipse plugin Debian packaging Pluggable language support New target language Regression test … [email protected]
- 25. Bibliography / Webography - SMC : http://smc.sourceforge.net/ - Robert C. Martin, "Agile Software Development" - http://en.wikipedia.org/wiki/Finite_state_machine - http://en.wikipedia.org/wiki/Statechart - D. Harel, "Statecharts: A Visual Formalism for Complex Systems" - http://www.uml.org/ - http://fr.wikipedia.org/wiki/Grafcet - NF C03-190 - Diagramme fonctionnel "GRAFCET" - http://en.wikipedia.org/wiki/Augmented_transition_network [email protected]