Few days ago I gave a talk about software architectures. My goal was to explain as easy as possible the main ideas behind the most popular software architectures like the client-server model, the 3-tier and multi-tier layered models, the idea behind SOA architecture and cloud computing, and few widely used architectural patterns like MVC (Model-View-Controller), MVP (Model-View-Presenter), PAC (Presentation Abstraction Control), MVVM (Model-View-ViewModel). In my talk I explain that MVC, MVP and MVVM are not necessary bound to any particular architectural model like client-server, 3-tier of SOA. MVC, MVP and MVVM are architectural principles applicable when we need to separate the presentation (UI), the data model and the presentation logic. Additionally I made an overview of the popular architectural principals IoC (Inversion of Control) and DI (Dependency Injection) and give examples how to build your own Inversion of Control (IoC) container.

3. What is Software Architecture?

5. System Architecture Diagram – Example

6. Example of Multi-Tier Software Architecture

7. Client-Server Architecture The Classical Client-Server Model

9. The Client-Server Model Server Desktop Client Mobile Client Client Machine network connection network connection network connection

11. 3-Tier / Multi-Tier Architectures Classical Layered Structure of Software Systems

13. The 3-Tier Architecture Model Business Logic Desktop Client Mobile Client Client Machine network network network Database Data Tier (Back-End) Middle Tier (Business Tier) Client Tier (Front-End)

15. Multi-Tier Architecture DB ORM WCF ASP .NET HTML

16. MVC (Model- View-Controller) What is MVC and How It Works?

18. MVC Architecture Blueprint

21. MVP (Model-View-Presenter) What is MVP Architecture and How it Works?

23. Presentation-Abstraction-Control (PAC) What is PAC and How It Works?

25. Presentation-Abstraction-Control (PAC) – Hierarchy

26. MVVM ( Model-View-ViewModel ) What is MVVM and How It Works?

32. IoC (Inversion of Control) and DI (Dependency Injection) Architectural Principals or Design Patterns?

34. Procedural Flow Control – Example private void DoSomeTransactionalWork(IDbSesion) { … } IDbSession session = new DbSession(); session.BeginTransaction(); try { DoSomeTransactionalWork(session); session.CommitTransaction(); } catch (Exception) { session.RollbackTransaction(); throw; } Step by step execution

35. Inverted Flow Control – Example private static void ExecuteInTransaction( Action<IDbSession> doSomeTransactionalWork) { IDbSession session = new DbSession(); session.BeginTransaction(); try { doSomeTransactionalWork(session); session.CommitTransaction(); } catch (Exception) { session.RollbackTransaction(); throw; } } ExecuteInTransaction(DoSomeTransactionalWork); Inverted flow control

48. SOA (Service-Oriented Architecture) SOA and Cloud Computing