Unit 617: Software Architecture

1. Introduction to Software Architecture

• Definition and scope of software architecture
• Importance and benefits of software architecture
• Goals of software architecture in software development
• Role of architecture in managing complexity and facilitating communication

2. Architectural Patterns

2.1 Layered Architecture

• Structure and components
• Advantages and typical use cases
• Implementation considerations

2.2 Client-Server Architecture

• Client and server roles
• Communication mechanisms
• Benefits and challenges

2.3 Microservices Architecture

• Definition and characteristics
• Benefits: scalability, independent deployment
• Challenges: complexity, data management

2.4 Event-Driven Architecture

• Event producers and consumers
• Event buses and messaging
• Use cases and advantages

3. Design Principles in Software Architecture

• Modularity: definition, benefits, and impact on maintainability
• Abstraction: hiding complexity, exposing interfaces
• Encapsulation: protecting data and functionality
• Separation of Concerns: dividing responsibilities
• How principles contribute to scalability and robustness

4. Architectural Styles

4.1 Monolithic Architecture

• Characteristics and structure
• Advantages and limitations

4.2 Service-Oriented Architecture (SOA)

• Core concepts and service composition
• Benefits for interoperability and reuse

4.3 RESTful Architecture

• Principles of REST (Representational State Transfer)
• Statelessness, resource identification, and uniform interface
• Suitability for web-based applications

5. Software Quality Attributes

• Performance: response time, throughput
• Reliability: fault tolerance, availability
• Scalability: vertical and horizontal scaling
• Maintainability: ease of updates and fixes
• Security: confidentiality, integrity, authentication
• Impact of architectural decisions on quality attributes
• Strategies to achieve and balance quality attributes

6. Architectural Decision Making

• Identifying and gathering requirements
• Evaluating alternative designs
• Conducting trade-off analysis
• Stakeholder involvement and communication
• Documenting architectural decisions (ADR - Architectural Decision Records)

7. Evolution and Refactoring of Software Architecture

• Challenges in maintaining evolving architectures
• Techniques for refactoring architecture
• Managing technical debt
• Adapting architecture to new requirements and technologies
• Minimizing risks during architectural changes

8. Tools and Technologies in Software Architecture

• Modeling languages: UML diagrams (component, deployment, sequence, etc.)
• Architecture documentation tools (e.g., Archi, Sparx EA)
• Architectural decision support systems
• Visualization and analysis tools

9. Case Studies in Software Architecture

• Examination of real-world software architectures
• Analysis of architectural decisions and trade-offs
• Challenges faced and solutions implemented
• Lessons learned and best practices