Comprehensive Design Patterns

Object-Oriented Analysis and Design (OOAD) is a process of identifying the needs of a software project and then laying out those specifications in a readable model. Design Patterns are an extension of these skills that create more maintainable and robust code. Using well-known, proven patterns that either stand-alone or build from one to the next, designers are able to further define the specifications of the project, optimizing quality and time spent on developing the project by programmers.

This advanced Object-Oriented course provides software architects and designers with skills to create high quality object-oriented designs exhibiting improved flexibility, reduced maintenance costs, and with increased understanding of the resulting code. Participants learn more than 30 object-oriented patterns, including the 23 micro-architectures in “Design Patterns: Elements of Reusable Object- Oriented Software”, by Gamma, Helm, Johnson, and Vlissides (the gang-of-four, or GoF book). Application examples and code snippets are provided to illustrate the patterns and the rationale for using that pattern in a given situation.

Course Objectives: • Improve Software Architecture. • Build Design Pattern Vocabulary. • Be able to discuss trade-offs in applying various design patterns. • Gain concepts and tools for writing better object-oriented code. • Gain concepts for better documenting object-oriented code. • Review relevant UML notation.

Audience: Software architects and designers requiring advanced design skills.

Prerequisites: Object-Oriented Analysis & Design with the Unified Modeling Language or equivalent experience. At least 6 months experience programming with an object-oriented programming language.

Number of Days: 4 days

1. Course Introduction Tell vs. Ask Course Objectives Command/Query Separation (CQS) Overview Composed Method Suggested References Combined Method 2. Design Pattern Overview Liskov Substitution Principle (LSP) Objectives in Software Design/Module Dependency Inversion Principle (DIP) Design Interface Segregation Principle (ISP) Overview of Patterns Law of Demeter Qualities of a Pattern 4. Principles of Package Architecture Pattern Systems Package Cohesion Principles Heuristics vs. Patterns Package Coupling Principles 3. Principles of Object-Oriented Design Martin Package Metrics Overview of Principles 5. Basic Object-Oriented Design Single-Responsibility Principle (SRP) Patterns Open-Closed Principle (OCP) Delegation vs. Inheritance

Interface Single Threaded Execution Immutable Guarded Suspension Null Object Balking Marker Interface Scheduler General Responsibility Assignment Read/Write Lock Software Patterns Producer/Consumer 6. Catalog of GoF Patterns Two-Phase Termination Overview of GoF Patterns Double-Checked Locking Introduction to Creation Patterns 9. Patterns-Oriented Software Factory Method Architecture Abstract Factory Systems of Patterns Builder Architectural Patterns Prototype Layers Architecture Singleton Pipes & Filters Architecture Introduction to Structural Patterns Blackboard Architecture Adapter Broker Decorator Model-View-Controller Proxy Presentation-Abstraction-Control Façade Reflection Composite Microkernel Flyweight Catalog of J2EE Patterns Bridge J2EE Pattern Relationships Introduction to Behavioral Patterns 10. Selected Process Patterns (from PLoP) Chain of Responsibility The Selfish Class Iterator Patterns for Evolving Frameworks Strategy Patterns for Designing in Teams Template Method Patterns for System Testing Mediator 11. Selected Anti-Patterns Observer Stovepipe System Memento Stovepipe Enterprise Command Reinvent the Wheel State Golden Hammer Visitor Death by Planning Interpreter Death March Projects 7. Other Micro-Architecture and System Additional Management Anti-Patterns Patterns 12. Patterns Summary Object Pool 13. Appendix A – UML Review Worker Thread 14. Appendix B – C# Code Examples for Dynamic Linkage GoF Cache Management 15. Appendix C – Maze Game Java Code Type Object Extension Object 16. Appendix D – Possible Solutions for Smart Pointer (C++) Exercises Session 17. Appendix E – Diagram Worksheets Transaction 8. Concurrency Patterns