3 April SOA: Services Oriented Architecture MDA: Model Driven Architecture.
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Transcript of 3 April SOA: Services Oriented Architecture MDA: Model Driven Architecture.
3 April
SOA: Services Oriented Architecture
MDA: Model Driven Architecture
SOA
Is it just good architecture? Potential value
Weaker designers Consistency across organizations Client-oriented
Relationship Between Model and Code
What is MDA? Modelling languages as declarative
programming languages Higher level of abstraction
Separation of design from implementation
OMG Model Oriented Architecture
Technologies
Platforms
Services
Domains
Program generation from models MDA is the latest Earlier
CASE-tools in 1980’s object-oriented IDEs in 1990’s UML tools …
• 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!
Model Driven Architecture
Building an MDA Application
Start with a Platform-Independent Model (PIM) representing business functionality and behavior, undistorted by technology details.
Platform-Independent
Model
A Detailed Model, stating Pre- and Post-Conditions in Object
Constraint Language, and Semantics in an action language
Generating Platform-Specific Model
Platform-Independent
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.
CORBA Model
Mapping to Multiple Deployment Technologies
Platform-Independent
Model
CORBA Model
MDA tool applies an standard mapping to generate Platform-Specific Model (PSM) from the PIM. Code is partially automatic, partially hand-written.
Java/EJBModel
XML/SOAPModel
OtherModel
Map a PIM to Many Middleware
Technologies via OMG Standard Mappings
Generating Implementations
Platform-Independent
Model
CORBA Model
MDA Tool generates all or most of the implementation code for deployment technology selected by the developer.
Java/EJBModel
CORBA
XML/SOAP
Model
Java/EJB XML/SOAP Other
OtherModel
Map PSM to application interfaces, code, GUI
descriptors, SQL queries, etc.