南京大学：《面向对象技术 OOT》课程教学资源（PPT课件讲稿）15 面向方面的编程 Aspect Oriented Programming（AOP）

Aspect Oriented Programming 面向方面的编程 Institute of Computer Software 2022-2-27 Nanjing University

面向方面的编程 Aspect Oriented Programming 2022-2-27 Institute of Computer Software Nanjing University 1

&雪扇 摘要 o2 UNIVE 2 Background and Motivation AOP AspectJ Summary Institute of Computer Software 2022-2-27 Nanjing University

摘要  Background and Motivation  AOP  AspectJ  Summary 2022-2-27 Institute of Computer Software Nanjing University 2

&雪扇 摘要 o2 UNIVE 3 Background and Motivation AOP AspectJ Summary Institute of Computer Software 2022-2-27 Nanjing University

摘要  Background and Motivation  AOP  AspectJ  Summary 2022-2-27 Institute of Computer Software Nanjing University 3

&扇 Background and Motivation 102 4 Where OOP has brought us Reusability of components Modularity Less complex implementation Reduced cost of maintenance Modularity is a universal advancement over structured programming that leads to clearer and better understood software Institute of Computer Software 2022-2-27 Nanjing University

Background and Motivation  Where OOP has brought us  Reusability of components  Modularity  Less complex implementation  Reduced cost of maintenance  ……  Modularity is a universal advancement over structured programming that leads to clearer and better understood software 2022-2-27 Institute of Computer Software Nanjing University 4

Modularity in Reality 102 UNIVE Code from org.apache.tomcat Red shows relevant lines of code XML Parsing 会 Good Modularity Nicely fits in one box Institute of computer Sonware 2022-2-27 Nanjing University

Modularity in Reality  Code from org.apache.tomcat 2022-2-27 Institute of Computer Software Nanjing University 5 XML Parsing Red shows relevant lines of code Nicely fits in one box Good Modularity

&雪扇 Modularity in Reality 102 UNIVE 6 fits in two boxes URL pattern matching Pretty Good Modularity Institute of Computer Software 2022-2-27 Nanjing University

Modularity in Reality 2022-2-27 Institute of Computer Software Nanjing University 6 URL pattern matching Pretty Good Modularity fits in two boxes

&雪扇 Modularity in Reality 102 UNIVE Code tangling and Red shows lines of code that scattering handle logging Logging Bad Modularity Not in just one place Not even in a small number of places Institute of Computer Software 2022-2-27 Nanjing University

Modularity in Reality 2022-2-27 Institute of Computer Software Nanjing University 7 Logging Red shows lines of code that handle logging Not in just one place Not even in a small number of places Bad Modularity Code tangling and scattering

&扇 History of Programming Paradigms 1902 UNIVE 8 In the beginning:Programming in whichever way. ▣Monolithic programs Institute 0r ou waie 2022-2-27 Nanjing University

History of Programming Paradigms  In the beginning: Programming in whichever way.  Monolithic programs 2022-2-27 Institute of Computer Software Nanjing University 8

&雪扇 History of Programming Paradigms 102 UNIVE 9 口 Structured Programming Functional decomposition Modularity Institute of Computer Software 2022-2-27 Nanjing University

History of Programming Paradigms  Structured Programming  Functional decomposition 2022-2-27 Institute of Computer Software Nanjing University 9 Modularity

&雪扇 History of Programming Paradigms 1002 UNIVE 10 Object-Oriented Programming Encapsulation Inheritance Modularity Institute of Computer Software 2022-2-27 Nanjing University

History of Programming Paradigms  Object-Oriented Programming  Encapsulation & Inheritance 2022-2-27 Institute of Computer Software Nanjing University 10 Modularity