Introduction To Aspect Oriented Programming
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The document introduces aspect oriented programming (AOP) as a programming paradigm that deals with cross-cutting concerns, such as logging and transaction management, that cut across multiple parts of a system. It discusses how AOP increases modularity and manages these cross-cutting concerns through features like advice, pointcuts, and weaving. Benefits of AOP include cleaner code, reduced repetition, and better encapsulation. Common AOP techniques are interceptors using dependency injection containers and IL code weaving tools.
Introduction To Aspect Oriented Programming
- 1. Introduction To Aspect Oriented Programming Present in Tabriz Software Open Talks Saeed Shargi Ghazani @saeed_shargi
- 2. Problem
- 3. DRY
- 4. Solutions Some techniques include : TemplateMetaprogramming MetaObjectProtocol Decorators TemplateMethodPattern RPC tools Many of the Creational Patterns MultipleInheritance and MixIns ContextObject or ExplicitManagementOfImplicitContext
- 5. Solutions Programming paradigm solution deal with this problem is : Aspect Oriented Programming
- 6. History Gregor Kiczales and colleagues at Xerox PARC in 1997 In 2001, the AspectJ extensions brought AOP to Java IBM research team in 2001 proposed Hyper/J Microsoft Transaction Server by EJB
- 7. Intro Software development technique that : Increase modularity Managing cross cutting concerns Infrastructure composition
- 8. Features Cross-Cutting Concerns Pieces of functionality that are used across multiple parts of a system Cross-Cutting concerns and nonfunctional requirements have a lot of overlap Advice Code that performs the cross-cutting concerns “What” of AOP Pointcut Join Point : Defined between logical steps “Where” of AOP
- 9. Features Tangling When cross-cutting concern code mixed with core code Scattering when cross-cutting concern code used in multiple methods Weaving combination of core codes with aspects
- 10. Features
- 11. Features
- 12. Benefits Clean Code Reduce Repetition Encapsulation
- 13. Aspects Encapsulating Wrapper SRP Decorator Pattern OCP
- 14. Aspects Lifetime OnStart OnSuccess OnExit OnError
- 15. Types Interceptors IL Code Weaving
- 16. Interceptors Calls to class methods or properties IoC Container No post compilation Dynamic Proxy
- 17. Interceptors Common use of IoC Conainer Calling Code IoC Container IMyInterface MyClass :IMyInterface
- 18. Interceptors Use of IoC Conainer with Dynamic Proxy Calling Code IoC Container IMyInterface MyClass:IMyInterface Dynamic Proxy ProxyInterceptor:IMyInterface ProxyInterceptor:IMyInterface
- 19. IL Code Weaving Run after compilation Post process
- 20. IL Code Weaving Common Tool to use :
- 21. Example Simple example in C# with Autofac IoC Container code’s is here SayHelloToAOP
- 22. Resources AOP in .NET, Matthew D. Groves, Manning Publications Co, 2013 Aspect Oriented Programming in .NET, Donald Belcham, Plurarsight, 2011 http://c2.com/cgi/wiki?CrossCuttingConcern http://en.wikipedia.org/wiki/Aspect-oriented_programming