Virtual EMF is a new prototype that allows for the transparent composition, weaving and linking of models. It extends EMF to compose elements from different models into a single virtual model. This virtual model can then be used transparently in standard modeling tools. Virtual EMF also aims to improve scalability by avoiding data duplication and enabling direct access to model elements. The prototype is demonstrated on a use case involving the MoDisco framework for model-driven reverse engineering.

1. Virtual EMF
Transparent Composition Weaving
Composition,
and Linking of Models
g
Hugo B
H Brunelière (Atl M d)
liè (AtlanMod)
& Grégoire Dupé (Mia-Software)
EclipseCon Europe 2011
November 2nd, 2011
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 1

2. Outline
 What’s this talk about?
What s
– Everything in one slide!
 Virtual EMF in a Nutshell…
– Why “virtual”? Overview…
– How “virtual”? Architecture…
virtual ?
– Many potential real applications!
– A brand new prototype on Eclipse Labs
p yp p
 MoDisco for the Use Case…
– What? The Eclipse-MDT project…
p p j
– What for? The generic and extensible framework…
 Virtual EMF in Action on a MoDisco Scenario…
– Demo time!!!
 Who We Are…
– AtlandMod (INRIA) & Mia-Software
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 2

3. What’s this talk about?
 Virtual EMF (for the purpose)
– A new prototype dedicated to the
transparent composition weaving and
composition,
linking of models
– A direct extension of EMF
– An Eclipse Labs project
p // g g / / p g/p
http://code.google.com/a/eclipselabs.org/p
/virtual-emf/
 MoDisco (for a p
( possible use case)
)
– A generic and extensible framework for
elaborating on Model Driven Reverse
Engineering solutions
– A MDT project: http://eclipse.org/MoDisco/
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 3

4. Virtual EMF in a Nutshell…
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 4

5. Why “virtual”? Overview…
y
 Definition: “a virtual model is a model whose
a
(virtual) elements are proxies to elements
contained i diff
i d in different models”
d l ”
Model Ma Links Model Mb
Virtual
EMF
Virtual Model
EMF‐based
EMF based EMF‐based
EMF based
Tool A VMab Tool B
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 5

6. Why “virtual”? Overview…
y
 Virtual model properties:
– Interoperability. Transparent use with all
standard modeling tools
d d d l l
– Scalability. Support for very big models
 Faster creation time. No additional copy of
model elements
 Low memory usage. No data duplication,
direct access to model elements
–SSynchronization. A t
h i ti Automated because of shared
t db f h d
model elements
–GGenericity. S
i it Support f all types of inter-model
t for ll t fi t d l
links (e.g.; associate, filter, merge, …)
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 6

7. How “virtual”? Architecture…
 Virtual EMF is made of 2 main components
– Implement EMF‐based EMF‐based
the Model Tool A Tool B
Access API
A uses uses
uses
EMF standard Model Access API
– Manage implements implements implements uses Linking API
the XMI
X I CDO
C O Virtualization
Vi li i
“virtual”
Serialization Mapping API
accesses accesses
links
li k uses
File
Database
System
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 7

8. How “virtual”? Architecture…
 Virtualization API
– Refinement of base EMF model access operations
(e.g.; createResource, eGet, eSet, )
(e g ; createResource eGet eSet …)
 Retrieval of referenced elements
 Support for virtual links
– Generation of the “virtual” composed metamodel
 Could be also “virtualized” in next versions
virtualized
 Linking API
g
– Current implementation via a model weaving
technology (AMW), others may be provided later
 Representation of inter-model relationships
 Transparent usage of virtually linked elements
p g y
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 8

9. Many potential real applications!
yp pp
 Model association in general
– E.g.; transparent inter-model dependencies
 M d l composition
Model iti
– E.g.; complementary models integration
 Model merging
– E.g.; similar models fusion
g;
 Model filtering
– E g ; model elements hiding
E.g.;
 Model overriding
–EE.g.; d li t d elements removal
duplicated l t l
 Etc.
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 9

10. A brand new prototype on Eclipse Labs
p yp p
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 10

11. MoDisco for the Use Case…
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 11

12. Eclipse-MDT MoDisco
p
An Eclipse framework to support
the elaboration of
Model Driven R
M d lD i Reverse Engineering
E i i
solutions
 Official Eclipse Modeling project (in MDT)
 Open-source (EPL)
p ( )
 Based on other Eclipse Modeling projects
 Released with Helios & Indigo
 Supported by the OMG
 Reference implementations for ADM (Architecture
 Driven Modernization) standards:
D i M d i ti ) t d d
 KDM (Knowledge Discovery Metamodel)
 SMM (Structured Metrics Metamodel)
 ASTM (Abstract Syntax Tree Metamodel)
( y )
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 12

13. MoDisco Overall Architecture
Supported Technologies
Java . . .
JSP XML
Metamodel Metamodel
Metamodel
Discoverer Discoverer
Discoverer
Generator Generator
Generator
Transfo. to KDM/UML
Discovery Model Customization OMG/ADM
Manager Browser & Extensibility Standards
Plug and orchestrate Navigation through Definition of Pivot metamodels
transformations complex models specific viewpoints (KDM, ASTM, SMM)
Infrastructure
Eclipse Modeling
Eclipse Modeling projects
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 13

14. Model Driven Reverse Engineering
(MDRE) Approach in MoDisco
 Use models to represent and manipulate
artifacts from existing systems
Existing
g Discover Understand Transform
Legacy System
Software artifacts :
New
‐ source code Models Viewpoints
‐ configuration files Software Artifacts
‐ tests
‐ database
‐…
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 14

15. Virtual EMF in Action on
a MoDisco Scenario
Scenario…
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 15

16. Virtual EMF Applied in a (MoDisco)
Reverse Engineering Context
 A scenario
scenario… Virtual Model
Traceability
Existing Discover Understand Transform
Legacy System
Eclipse plugin
developed in
d l d Java KDM UML2 Class
UML2 Class
Java Model Model Model
(source code)
Virtual Model Virtual Model
Merging Filtering
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 16

17. Who We Are?
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 17

18. AtlandMod – An Expert Research Team
in Modeling
 A common team
between INRIA, Ecole Labs (scientific experts)
des Mines de Nantes
(EMN) & LINA
 Expertise on Model
Driven Engineering Eclipse
(MDE) OMG
 Focus on “Modeling
Modeling Open source
Technologies for Etc.
Software Production, SMEs Big Companies
g p
Evolution, and
E l ti d (technology providers) (end-users)
Operation”
 Actively involved in Application D i
A li ti Driven Research
R h
Eclipse via MoDisco, A virtuous triangle…
EMF Facet, ATL
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 18

19. Mia-Software – Model Driven Agility
Company
 A software provider
specialized in the Labs (scientific experts)
pp
Model-Driven approach
 Involved in Eclipse via
MoDisco,
MoDisco EMF Facet Eclipse
& Papyrus OMG
Open source
 A subsidiary of Etc.
SODIFRANCE Group
benefiting from the
SMEs Big Companies
g p
(technology providers) (end-users)
efforts engaged in
R&D about the
evolution of legacy
y
systems
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 19

20. Thanks for your attention!
y
 Useful links
– Virtual EMF on Eclipse Labs
 htt // d
http://code.google.com/a/eclipselabs.org/p/virtual-emf/
l / / li l b / / i t l f/
– Eclipse-MDT MoDisco project
 http://www eclipse org/MoDisco
http://www.eclipse.org/MoDisco
 Contacts
– Caue Clasen – caue.avila_clasen@inria.fr
 Vi t l EMF
Virtual
– Hugo Bruneliere - hugo.bruneliere@inria.fr
 Virtual EMF & MoDisco
– Grégoire Dupé – gdupe@mia-software.com
 MoDisco
02/11/2011 © AtlanMod (INRIA, EMN & LINA) and Mia‐Software 20