Final workshop of the ANR project GEMOC. March 17th, 2016. Talk given by Joël Champeau

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Joël Champeau (Lab-STICC – ENSTA Bretagne)
Joel.champeau@ensta-bretagne.fr
Concurrency reification in the xDSML with
MoCCML
Gemoc Final Workshop, March 17th, 2016

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The MoCCML approach
Gemoc Final Workshop - 2
DSE

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import 'platform:/resource/org.gemoc.sigpmldomain/model/sigpmldomain.ecore'
--import './sigpmldomain.ecore'
ECLimport "platform:/resource/org.gemoc.sigpmltuto.mocc/mocc/SigpmlTuto.moccml"
--ECLimport "./xSigpml.moccml"
ECLimport "platform:/plugin/fr.inria.aoste.timesquare.ccslkernel.model/ccsllibrary/kernel.ccslLib"
ECLimport "platform:/plugin/fr.inria.aoste.timesquare.ccslkernel.model/ccsllibrary/CCSL.ccslLib"
package sigpml
context Block
def : execute : Event = self.execute()
context Connector
inv ConnectorComputing:
let capacity : Integer = self.oclAsType(Connector).capacity in
let inRate : Integer = self.itsInputPort.oclAsType(Port).rate in
let outRate : Integer = self.itsOutputPort.oclAsType(Port).rate in
let currentSize : Integer = self.oclAsType(Connector).currentSize in
Relation ConnectorSDF_PAM (
self.itsOutputPort.oclAsType(OutputPort).owner.oclAsType(Block).execute,
self.itsInputPort.oclAsType(InputPor
DSE definition and MoCCML Libraries
Gemoc Final Workshop - 3
Focus on DSE and MoCCML specifications
• Domain Model with Execution Function and Data
• DSE = Event definition on EF
• MoCCML definition = Declarative constraints on events
MoCCML LibraryDSE Definition
Execution Function
Execution Data

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DSE declaration
Gemoc Final Workshop - 4
import 'platform:/resource/org.gemoc.sigpmldomain/model/sigpmldomain.ecore'
ECLimport "platform:/resource/org.gemoc.sigpmltuto.mocc/mocc/SigpmlTuto.moccml"
ECLimport "platform:/plugin/fr.inria.aoste.timesquare.ccslkernel.model/ccsllibrary/kernel.ccslLib"
ECLimport "platform:/plugin/fr.inria.aoste.timesquare.ccslkernel.model/ccsllibrary/CCSL.ccslLib"
package sigpml
context Block
def : execute : Event = self.execute()
context Connector
inv ConnectorSynchronization:
Relation Coincides( self.itsOutputPort.oclAsType(OutputPort).owner.oclAsType(Block).execute,
self.itsInputPort.oclAsType(InputPort).owner.oclAsType(Block).execute )
endpackage

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DSE declaration
Gemoc Final Workshop - 5
context Block
def : execute : Event = self.execute()
context Connector
inv ConnectorComputing:
let capacity : Integer = self.oclAsType(Connector).capacity in
let inRate : Integer = self.itsInputPort.oclAsType(Port).rate in
let outRate : Integer = self.itsOutputPort.oclAsType(Port).rate in
let currentSize : Integer = self.oclAsType(Connector).currentSize in
Relation MoccSDFLike (
self.itsOutputPort.oclAsType(OutputPort).owner.oclAsType(Block).execute,
self.itsInputPort.oclAsType(InputPort).owner.oclAsType(Block).execute,
capacity,
inRate,
outRate,
currentSize )
endpackage

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MoCCML meta-language
Gemoc Final Workshop - 6
MoCCML language
• Declarative language dedicated to concurrency definition
• Clock-based approach
• Formally defined
• MoCCML = Declarative operators and state machine constraints
MoCCML in Gemoc
• Concurrency definition at meta-level
• Constraints the model events
• Enables simulation and state-space analysis
Towards a Meta-Language for Concurrency Concern in DSLs
Julien Deantoni, Papa Issa Diallo, Ciprian Teodorov, Joël Champeau, Benoit Combemale,
In Design, Automation and Test in Europe Conference and Exhibition (DATE 2015), 2015

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MoCCML language
Gemoc Final Workshop - 8
MoCCML usage
• Declarative predefined operators in DSE definition
• Reusable and parametric library definitions

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MoCCML language
Gemoc Final Workshop - 9
MoCCML state machine intuitive semantics
• Triggers as Clocks
• Guards as Condition expressions on integer variables
• Action as assignment and arithmetic operators on variables

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MoCCML language
Gemoc Final Workshop - 10
MoCCML models define
• MoCCML relations as a set of constraints on the model events
• The semantics defines a state space with the associated
value of the events
• The acceptable schedules are a set of steps
step = set of possible occurring events
• Adding MoCCML relation reduces the execution possibilities

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MoCCML language
Gemoc Final Workshop - 11
MoCCML metamodel

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MoCCML model instantiation
• A MoCCML relation is instantiated for each model element
• The execution model is interpreted by the solver
MoCCML instantiation process
Gemoc Final Workshop - 12
Concurrent
Execution
Engine
EF + ED
EF + ED
EF + ED
EF + ED

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Backward DSE Mapping
Gemoc Final Workshop - 13
Feedback Protocol
• How a value returned by an Execution Function influences the decision of
the execution engine?
• For language constructs whose control flow depends on runtime data
available only at runtime (e.g. DecisionNode).

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Feedback DSE extension
Gemoc Final Workshop - 14
DSE EvaluateGuard:
upon evaluateGuard
triggers ActivityEdge.EvaluateGuard
returning result
feedback:
[result] => allow MayExecuteTarget
default => allow MayNotExecuteTarget
end
end
Weaving Concurrency in eXecutable Domain-Specific Modeling Languages (Florent Latombe, Xavier
Crégut, Benoît Combemale, Julien Deantoni, Marc Pantel), In 8th ACM SIGPLAN International Conference
on Software Language Engineering (SLE 2015), ACM, 2015.

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Concurrency reification in Gemoc
Gemoc Final Workshop - 15
Concurrency specification
• DSE specification including feedback protocol
• MoCCML language
− Textual and graphical syntax
− Declarative operators and state machine relations
• MoCCML relations for architecture model to add constraints
related to the mapping
• Relation instantiation at model level to simulate the xDSML in
the Gemoc Studio (Demo ArduinoDesigner)
• Coupled with a state space analysis tooling as an extension of
the Gemoc Studio (Demo ArduinoDesigner)