A conceptual framework for behavioural adaptation @ Meeting ASCENS 2011

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Alberto Lluch Lafuente

Talk at ASCENS meeting in Grenoble (July 2011).

Tecnologia Negócios

A conceptual framework
for (behavioural) adaptation
WP2 / ASCENS General Meeting
Grenoble, July 7-8, 2011

1

alberto.lluch@imtlucca.it

towards D2.4
D2.4
“A Conceptual
A Foundational
Framework for
Framework for
Adaptation”
Autonomic
Computational
Models with
Feedback and
Assessment of
Models

·1· A framework for adaptation
·2· Reflective Rule-based Programming
·3· Context-Oriented Programming

our sources of inspiration
IBM's AC/MAPE-K
SCEL (META)KLAIM MAUDE
CONTEXT-ORIENTED PROGRAMMING
EU Projects (S-CUBE, CASCADAS, ALLOW,...)

WP4's SELF-ADAPTATION PATTERNS
MATTHIAS' GOAL-ORIENTED
ADAPTATION

let's walk together

WP4's frk
WP4's frk
SCEL SCEL
D2.4
“A Conceptual Foundational
Framework for … Feedback
Adaptation” … Assessment
…

Case Case
study 1 study 1
Case
Case Case
Casestudy 3 study 3
study 2 study 2

adaptation

“The act of modifying behaviour...”

- WP4, (c.f. “framework for self-adaptation
and self-expression in ASCENS”)

adaptable

“Something whose behaviour can be
modified”

- WP2

adaptable program = control
+ data

CONTROL DATA

adaptable program = control
+ data
+ control data
MANAGER

CONTROL
DATA

CONTROL DATA

which “control data”?
rules?
contexts?
CONTROL
interactions?
DATA policies?
etc.
CONTROL

smells like control data...

 Models: HO π-calculus, MetaKlaim, HO Petri nets,
Rewriting Logic, HO Graph Grammars,
Logic Programming, etc.
 Languages: reflection,
aspects, monads,
effects, contexts, etc.
 etc.

desiderata 1: compositional
...

CD1

C1

CD0

C0

WP4's internal feedback loop pattern

INTERNAL
MANAGER

CONTROL
DATA

CONTROL

WP4's external feedback loops?

CD

EXTERNAL
CONTROLLER

CD

CONTROL

(un)desiderata?
reciprocal management?

CD CD

C C
CD

C
self management
(without separation of concerns)?

desiderata 2: MAPE-K compliance
Control
AUTONOMIC MANAGER
Data

Analyze Plan

Control
Monitor Knowledge Execute

Control
Data

MANAGED ELEMENT

CD
MAPE-K towers
A P

M K E

CD

A P

M K E

CD

A P

M K E

CD
MANAGED ELEMENT

http://www.springerlink.com/content/3lcycpvew20fcl9q/

context-oriented programming

A'

A

A''

context-oriented languages
 ContextL(isp)
 ContextPy(thon)
 ContextR(uby)
 ContextS(malltalk)
 ContextScheme
 ContextJ(ava)
 ContextErlang
 ...

$class bot { contextJ private void go(void); void go(void){ set_speed(normal); } layer surface{ void go(void){ all_wheel_drive(); set_speed(fast); }} layer darkness{ void go(void){ proceed(); /* propagation */ turn_lights_on(); set_speed(slow); }} }$

$dynamic dispatching Active Variation Stack meteor_storm with(surface){ with(darkness){ darkness with(meteor_storm){ surface go(); } } }$

$layers as control data bot.set_layers(...); meteor_storm darkness surface with(this.layers()){ go(); }$

summary

 We have presented a conceptual framework for adaptation;
 One step towards the foundational models of AC (D2.4);
 Assessment with foundational models and paradigms:
– e.g. reflective logical frameworks;
– e.g. context-oriented languages;
 We are starting to understand what is adaptation;
 We are figuring out how to realize it with “our” models.

some questions

·1· What is “control data” in SCEL? (policies? Tuples?)
·2· Does SCEL have meta/reflective features? (metaKlaim?)
·3· Adaptation towers/loops in SCEL: programmable? native?
·4· Compositional approach (c.f. BIP) vs external/imp. loops?
·5· Structural adaptation via “structural data” (e.g. connectors)?
·6· Is control data Knowledge? Expressed in KnowLang?
·7· Is control data an interface? (c.f. WP2's kick-off talk)
·8· Are goals/plans control data?

outlook
WP4's frk
WP4's frk
SCEL SCEL
D2.4
“A Conceptual Foundational
Framework for … Feedback
Adaptation” … Assessment
…

Case Case
study 1 study 1
Case
Case Case
Casestudy 3 study 3
study 2 study 2

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A conceptual framework for behavioural adaptation @ Meeting ASCENS 2011

1. A conceptual framework for (behavioural) adaptation WP2 / ASCENS General Meeting Grenoble, July 7-8, 2011 1 alberto.lluch@imtlucca.it

2. towards D2.4 D2.4 “A Conceptual A Foundational Framework for Framework for Adaptation” Autonomic Computational Models with Feedback and Assessment of Models

3. ·1· A framework for adaptation ·2· Reflective Rule-based Programming ·3· Context-Oriented Programming

4. ·1· A framework for adaptation ·2· Reflective Rule-based Programming ·3· Context-Oriented Programming

5. our sources of inspiration IBM's AC/MAPE-K SCEL (META)KLAIM MAUDE CONTEXT-ORIENTED PROGRAMMING EU Projects (S-CUBE, CASCADAS, ALLOW,...) WP4's SELF-ADAPTATION PATTERNS MATTHIAS' GOAL-ORIENTED ADAPTATION

6. let's walk together WP4's frk WP4's frk SCEL SCEL D2.4 “A Conceptual Foundational Framework for … Feedback Adaptation” … Assessment … Case Case study 1 study 1 Case Case Case Casestudy 3 study 3 study 2 study 2

7. adaptation “The act of modifying behaviour...” - WP4, (c.f. “framework for self-adaptation and self-expression in ASCENS”)

8. adaptable “Something whose behaviour can be modified” - WP2

9. adaptable program = control + data CONTROL DATA

10. adaptable program = control + data + control data MANAGER CONTROL DATA CONTROL DATA

11. which “control data”? rules? contexts? CONTROL interactions? DATA policies? etc. CONTROL

12. smells like control data...  Models: HO π-calculus, MetaKlaim, HO Petri nets, Rewriting Logic, HO Graph Grammars, Logic Programming, etc.  Languages: reflection, aspects, monads, effects, contexts, etc.  etc.

13. desiderata 1: compositional ... CD1 C1 CD0 C0

14. WP4's internal feedback loop pattern INTERNAL MANAGER CONTROL DATA CONTROL

15. WP4's external feedback loops? CD EXTERNAL CONTROLLER CD CONTROL

16. (un)desiderata? reciprocal management? CD CD C C CD C self management (without separation of concerns)?

17. desiderata 2: MAPE-K compliance Control AUTONOMIC MANAGER Data Analyze Plan Control Monitor Knowledge Execute Control Data MANAGED ELEMENT

18. CD MAPE-K towers A P M K E CD A P M K E CD A P M K E CD MANAGED ELEMENT

19. ·1· A framework for adaptation ·2· Reflective Rule-based Programming ·3· Context-Oriented Programming

27. the tower in the framework ...

28. http://www.springerlink.com/content/3lcycpvew20fcl9q/

29. mobility

30. adaptation

31. ·1· A framework for adaptation ·2· Reflective Rule-based Programming ·3· Context-Oriented Programming

32. http://arxiv.org/abs/1105.0069v1

33. context-oriented programming A' A A''

34. context-oriented languages  ContextL(isp)  ContextPy(thon)  ContextR(uby)  ContextS(malltalk)  ContextScheme  ContextJ(ava)  ContextErlang  ...

35. class bot { contextJ private void go(void); void go(void){ set_speed(normal); } layer surface{ void go(void){ all_wheel_drive(); set_speed(fast); }} layer darkness{ void go(void){ proceed(); /* propagation */ turn_lights_on(); set_speed(slow); }} }

36. dynamic dispatching Active Variation Stack meteor_storm with(surface){ with(darkness){ darkness with(meteor_storm){ surface go(); } } }

37. layers as control data bot.set_layers(...); meteor_storm darkness surface with(this.layers()){ go(); }

38. MAPE-K in COP

39. ·1· A framework for adaptation ·2· Reflective Rule-based Programming ·3· Context-Oriented Programming

40. summary  We have presented a conceptual framework for adaptation;  One step towards the foundational models of AC (D2.4);  Assessment with foundational models and paradigms: – e.g. reflective logical frameworks; – e.g. context-oriented languages;  We are starting to understand what is adaptation;  We are figuring out how to realize it with “our” models.

41. some questions ·1· What is “control data” in SCEL? (policies? Tuples?) ·2· Does SCEL have meta/reflective features? (metaKlaim?) ·3· Adaptation towers/loops in SCEL: programmable? native? ·4· Compositional approach (c.f. BIP) vs external/imp. loops? ·5· Structural adaptation via “structural data” (e.g. connectors)? ·6· Is control data Knowledge? Expressed in KnowLang? ·7· Is control data an interface? (c.f. WP2's kick-off talk) ·8· Are goals/plans control data?

42. outlook WP4's frk WP4's frk SCEL SCEL D2.4 “A Conceptual Foundational Framework for … Feedback Adaptation” … Assessment … Case Case study 1 study 1 Case Case Case Casestudy 3 study 3 study 2 study 2

43. QUESTIONS? (or answers) ascens

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