3 April

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3 April

• SOA Services Oriented Architecture
• MDA Model Driven Architecture

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SOA

• Is it just good architecture?
• Potential value
• Weaker designers
• Consistency across organizations
• Client-oriented

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Relationship Between Model and Code
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What is MDA?

• Modelling languages as declarative programming
  languages
• Higher level of abstraction
• Separation of design from implementation

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OMG Model Oriented Architecture

• Technologies
• Platforms
• Services
• Domains

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Program generation from models

• MDA is the latest
• Earlier
• CASE-tools in 1980s
• object-oriented IDEs in 1990s
• UML tools

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Model Driven Architecture

• New orientation for OMG activities
• New step beyond the Object Management
  Architecture (OMA)
• Models are centric!
• Target middleware is not important!
• Focus on Platform Independent Models (PIM)
• Without middleware details
• Abstract Platform Specific Models (PSM)
• Including all middleware details
• Define PIM to PSM transformations
• Preserving PIM when new middleware appears!

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Building an MDA Application
Start with a Platform-Independent Model (PIM)
representing business functionality and behavior,
undistorted by technology details.
A Detailed Model, stating Pre- and
Post-Conditions in Object Constraint Language,
and Semantics in an action language
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Generating Platform-Specific Model
Map a PIM to Specific Middleware Technologies via
OMG Standard Mappings
MDA tool applies a standard mapping to generate
Platform-Specific Model (PSM) from the PIM. Code
is partially automatic, partially hand-written.
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Mapping to Multiple Deployment Technologies
MDA tool applies an standard mapping to generate
Platform-Specific Model (PSM) from the PIM. Code
is partially automatic, partially hand-written.
Map a PIM to Many Middleware Technologies via OMG
Standard Mappings
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Generating Implementations
MDA Tool generates all or most of the
implementation code for deployment technology
selected by the developer.
Map PSM to application interfaces, code, GUI
descriptors, SQL queries, etc.