System Decomposition.md

System Decomposition

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• Partioning
  • Open Architecture (Transparent Layering)
    • Any layer can invoke operations from any layers below
    • Runtime Efficiency
    • Interface Segregation
    • Backend For Frontend pattern
    • Service Orientation
  • Closed Architecture (Opaque Layering)
    • A layer can only invoke operations from the immediate Layer
    • Sinkhole Anti pattern
      • "More pass through requests"
  • Horizontal Partition : Layered Architecture (Separation of Functionality)
    • A layer can only depend on lower layers
    • A layer has no knowledge on higher layers

Object Oriented Decomposition

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• SOLID (Ordering) Principles
  • Single Responsibility
  • Dependency inversion (Abstraction)
    • Substitution (LSP)
      • FAT Abstraction
        • ISP
  • OCP - Visitor
• Objects
• Concepts[ Ordering ]
  • Encapsulation - SRP
    • Cohesion
    • Coupling
  • Reusability
    • Inheritance
    • Uses
      • Association
      • Composition
      • Aggregation
  • Runtime Polymorphism require Inheritance
    • Abstraction [Loosely Coupled]
  • Dependency Injection
    • Injection By Hand
    • Injection By Container
• Relationship b/w Objects
  • is-a
  • has-a
• Design Patterns - GOF (Creational / Structural and Behavioral)
• Inheritance V/s Uses
  • Bridge
• Runtime Polymorphism v/s Function pointers (Command Object)
• Why interfaces ?
• Why Abstract Class ?
• is Information Hiding is same as Abstraction
• LOD Violation
• Inheritance v/s enum

FinancialRiskCalculation

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• Information Holders
  • TDSDataModel
  • RDSDataModel
  • RiskConfigParameter
  • RiskInput
  • RiskResult
  • RiskReport
• RiskCalculator
• TDSXMlDataReader
• RDSXMLDataReader
• RiskDataInputGenerator (Merge)
• ExcelExporter
• RiskDataProcessor