Software Architecture

1
Software Architecture

• John Cheesman
• Manager, Product Architecture
• Application Development Division
• www.cool.sterling.com

2
Topics

• Sterling Software ADG CBD
• Industry / Partners
• Application development approach
• Feedback / Discussion

3
Sterling Software ADG CBD

• Application Development Group
• Model-Based Toolsets, 100 code generation
• Rigour, Traceability, Consistency
• Enterprise Application Market
• CASE
• WorldWide CBD Customer Advisory Board
• 80 members, 6-monthly meetings, monthly telecons
• Component Specification Standard
• Incorporate best practice into the tools and
  method
• Customers doing CBD since 1995

4
Industry / Partners

• UML
• partners in UML 1.0 and 1.1
• Microsoft Repository
• joint Engine and Information model design with
  Microsoft
• NIST
• 1.6 million US grant for CBD research and
  application
• Patterns, Frameworks, Component Specification
  Architectures
• Catalysis
• worked with DSouza and Wills to apply concepts
• Yes, we have bought the book!

5
Application Development Approach

• Assembly from heterogeneous components
• Application (legacy) Integration
• Business Models -gt Binaries
• Frameworks generation toolsets manifest
  application architectures applications
  customise

6
Application Development Approach

• Technology-neutral component modeling
  specification architecture (COOLSpex)

• CBD Outside, IE/OO/(CBD) Inside
• Layered Architectures

7
Feedback / Discussion

• Standards (CBD96).
• As-Is often dominates
• new roads in London
• Organisational, Cultural Issues
• project funding/management, internal champions
• Keep it Simple
• Messages take a long time to arrive
• Distortion en-route
• Specification vs Implementation
• Components Outside, Anything inside
• Dont need an OOP
• Care with model semantics (e.g. subtyping vs
  subclassing)
• Business Rules - where are they ?
• Separate Business Process from Business Objects
• variable vs stable
• Replace vs Reuse - dependency management