context-oriented programming …pages.di.unipi.it › throughthefog › wp-content › uploads ›...

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CONTEXT-ORIENTEDPROGRAMMINGABSTRACTIONSFORFOGC.BODEI,P.DEGANO,G.FERRARI,L.GALLETTA

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ML-CODA:AContext-OrientedProgrammingLanguage

FUNCTIONALLANGUAGE

ML

(KERNEL)

CONTEXT

DATALOGKNOWLEDGE

BASE

ML-CODA

BODEI,CANCIANI,DEGANO,GALLETTA,SALVATORI,FERRARI

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CONTEXT

ML

(KERNEL)

ABSTRACTIONLAYERVIRTUALIZATIONOFTHE

OPERATIONALENVIRONMENT

PHYSICALENV:POSITION

CONNECTIVITY:

APPPREFSPROFILES

:ML-CODA

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ContextDependentBinding

dlet txt=

getTxt ()when only_speech()

in …

(* txt is a parameter: its value depend on the current context *)

CONTEXT

ML-CODA

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BehaviouralVariaEons

fun getData()=let url = (_){<-direct_com(). let c = getChan() in receiveData c,<- use_qrcode(),camera(on). let p = take_picture() in decode_qr p }in getRemoteData:

CONTEXT

ML-CODA

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BehavioralVariaEons

fun getData()=let url = (_){<-direct_com(). let c = getChan() in receiveData c,<- use_qrcode(),camera(on). let p = take_picture() in decode_qr p }in getRemoteData:

CONTEXT

Adap@vity:appcanmodifyitsbehaviouraccordingtochangesinitscontextML-CODA

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ML-CODA

  StaEcMachinery(DFG@IEEE-TSE)o  verifythatdispatchingmechanismalwayssucceed

  SecurityAnalysis(DBGS@JCS)o  detectpotenEalunsafemodicaEons  PrototypeImplementaEon(CDFG@FOCLASA)o  ContextOrientedExtensionofF#

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OURF(r)OGGOAL:PROGRAMMINGABSTRACTIONS

inaContext-Awarefashion

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ProgrammingModel

•  HowcanweeasilydevelopapplicaEonsonthefogcompuEnginfrastructure?•  Mirko’stalkforfurthermoEvaEons

•  Needarightprogrammingmodelthat•  Providessuitableprogrammingabstrac@ons•  Ensuresdynamicadapta@on•  Supportcontext-awareorchestra@ons•  Supportshierarchicalresources•  Enforcecontext-awaresecurityproper@es•  Supportverifica@on

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OurF(r)ROGgoals:byexamples

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<Type,Speed,otherinfo>

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CONTEXT

TOPOLOGYOFSTLsLOCALSERVICESHIERARCHYINFO

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CONTEXT

TOPOLOGYOFSTLsLOCALSERVICESHIERARCHYINFO

COMPUTING&ORCHESTRATION

PUT_DATA()

LOCAL&NONLOCAL

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CONTEXT

TOPOLOGYOFSTLsLOCALSERVICESHIERARCHYINFO

COMPUTING&ORCHESTRATION

ORCHESTRATE(param)

Slow-downwarning

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CONTEXT

TOPOLOGYOFSTLsLOCALSERVICESHIERARCHYINFO

COMPUTING&ORCHESTRATION

ORCHESTRATE()Slow-downwarning

ORCHESTRATION=LIGHTHOUSE

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CONTEXT

TOPOLOGYOFSTLsLOCALSERVICESHIERARCHYINFO

COMPUTING&ORCHESTRATION

ORCHESTRATE()Slow-downwarning

DYNAMICORCHESTRATION=CONTEXTDEPENDENTADAPTATION

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CONTEXT

LOCALSERVICESHIERARCHYINFO

POLICIES

COMPUTING&ORCHESTRATION

ACTIVATE_SERVICE()

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ARCHITECTURALSTYLE

APPCXT

APPCXT

APPCXT

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Context-awareness:adaptaEon

Adapta@onstep

APPCXT

APPCXT

APPCXT

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Context-awareness:CoordinaEngParallelism

APPCXT

APPCXT

APPCXT

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