Model Driven Development And Model Driven Architecture

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Model Driven DevelopmentAnd Model Driven
Architecture
Juan Pablo Zamora Zapata
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Contenido

• Modelos en Disciplinas Ingenieriles
• Desarrollo de Software Tradicional
• Estandares de la OMG
• Arquitectura Guiada por Modelos MDA

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Outline

• Models in Engineering Disciplines
• Traditional approach to Software Development
• OMG Standards
• Model Driven Architecture (MDA) context

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Models in Engineering Disciplines
X
Building a bridge...
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How do we develop software today?
Analysis
Design
Implementation
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Model Driven Development
Analysis
Design
Implementation
Model Driven Development
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Software Models vs. other Engineering Models
Civil Engineering
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Software Models vs. other Engineering Models
Software Engineering
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Problems with...
?
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Software language standardization

• 10 Object-Oriented Modeling Languages developed
  between 1970 and 1989
• 40 developed between 1989 and 1994

UML 0.9
UML 1.0
UML 1.1
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MDA Context

• Object Management Group
• International not-for-profit software consortium
  that is setting standards in the area of
  distributed object computing.
• 450 members (Alcatel, ATT, Boeing, Borland,
  Carleton University, Cisco Systems, Daymler
  Chrysler, Ericcson, HP, IBM, Lockheed Martin,
  Massachusetts Institute of Technology, Motorola,
  Nokia, Sony Corporation, Sun Microsystems, Visa
  International)
• OMG Standards
• CORBA (Common Object Request Broker Architecture)
• UML (Unified Modeling Language)
• MOF (Meta Object Facility)
• MDA (Model Driven Architecture)
• QVT (Queries / Views / Transformation)
• etc.

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Meta Object Facility
M3
MOF
M2
M1
M0
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MDA Concepts

• System A system may include anything a
  program, a single computer system, some
  combination of parts of different systems, a
  federation of systems, each under separate
  control, people, an enterprise, a federation of
  enterprises Much of the discussion focuses on
  software within the system 1.
• Model A model of a system is a description or
  specification of that system and its environment
  for some certain purpose. A model is often
  presented as a combination of drawings and text.
  The text may be in a modeling language or in a
  natural language 1.
• Architecture The architecture of a system is a
  specification of the parts and connectors of the
  system and the rules for the interactions of the
  parts using the connectors1.

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MDA Concepts

• Platform A set of subsystems/technologies that
  provide a coherent set of functionality through
  interfaces and specified usage patterns that any
  subsystem that depends on the platform can use
  without concern for the details of how the
  functionality provided by the platform is
  implemented 1.
• Platform Independence is a quality which a
  model may exhibit. This is the quality that the
  model does not call for the support of a platform
  of a particular type. Like most qualities,
  platform independence is a matter of degree 1.

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MDA Concepts

• Computation Independent Model (CIM) focuses on
  the system and its environment the details of
  the structure of the system are hidden or as yet
  undetermined 1.
• Platform Independent Model (PIM) A model of a
  subsystem that contains no information specific
  to the platform, or the technology that is used
  to realize it 1.
• Platform Specific Model (PSM) A model of a
  subsystem that includes information about the
  specific technology that is used in the
  realization of it on a specific platform, and
  hence possibly contains elements that are
  specific to the platform 1.

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MDA Concepts

• Model Transformation Model transformation is
  the process of converting one model to another
  model of the same system.

figure from 1
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MDA Concepts
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MDA Metamodel
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Common Warehouse Metamodel (CWM) Example
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Library System Traditional Approach

• Library System 1
• .NET platform

• Library System 2
• J2EE platform

Model
Model
Model
Model
Model
Model
Model
Model
Implementation
Implementation
Library System
Library System
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Library System MDA Approach
Library CIM
Library PIM
Library PSM .NET
Library PSM CORBA
Library PSM J2EE
Library System .NET
Library System CORBA
Library System J2EE
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The missing piece...
Model Transformation
XML HWY
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XML and XSLT/XPath for model transformation...
PIM
XML
X
QVT (Queries/Views/Transformations)
XSLT/XPath
PSM
XML
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The missing piece...
XML HWY
QVT Rd
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QVT Standardization
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QVT Concepts

• Query A query takes as input a model, and
  selects specific elements from that model 3.
• Views a model that is derived from another
  model.
• Transformations umbrella term for relation and
  mapping 3.

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QVT Concepts

• Mapping A mapping is a potentially directed
  transformation implementation 3
• Relation Relations are multi-directional
  declarative transformation specifications 3
• Domain Transformation are specified between a
  number of domains. In the superstructure a domain
  consists of a number of patterns and a condition
  3

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Queries / Views / Transformations (QVT)
figure from 3
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Queries / Views / Transformations (QVT)
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QVT Standardization
YES
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References

• 1 OMG. ab/03-01-03 MDA Guide review draft
• 2 OMG. formal/02-04-03 (Meta Object Facility
  (MOF), 1.4)
• 3 OMG. ad/04-04-01 Joint revised submission
  for the QVT RFP
• 4 OMG. ormsc/02-01-01 Model Driven
  Architecture (MDA)
• 5 David S. Frankel. Applying MDA to Enterprise
  Computing. 2003.

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Questions