AspectJ Android with Example

1. Introduction to AspectJ
Erol KOCAMAN
GDG Istanbul
25/10/2014

2. Peak Games

3. Peak Games

4. Agenda
● Why we use AOP ?
● Cross Cutting Concerns
● Aspect Implementations in Java
● AOP with OOP
● AspectJ Compiler
● Demo Project

5. Why do we use AOP ?
GAME 1
Module 1
Module 2
Module 3
GAME 2
Module 4
Android
IOS
Desktop

6. Cross Cutting Concerns
In App Billing Networking Game
Logging Analytics Profiling

7. After Aspect
In App Billing Networking Game
Logging
Aspect
Analytics
Aspect
Profiling
Aspect

8. AOP / OOP
● OOP is encapsulation of module for better
understanding
● You can even do the same thing with OOP by
coding more
● AOP is valid for all programming paradigms

9. Aspect Implementations
● AspectJ
● Spring AOP
● JBossAOP
● JAC
● Colt
● PROSE

10. AspectJ Compiler
Java & Aspect
Source Files
Java & Aspect
Archive Files
Java & Aspect
Archive Files
Java (.jar)
& Aspect
Archive Files
(.jar)
(.jar)
AspectJ
Compiler
(ajc)
Woven system
(.class files)
Java & Aspect
Source Files
Java & Aspect
Source Files
(.java)

11. Program Execution
Terminology
Advice
// aspect code
if (...) {
...
} else {
...
}
Pointcut
Join Points

12. JoinPoint Types
● Method
● call
● execution
execution(* android.mobile.peakgames.net.aspectjandroid.AspectActivity.fetchImage(..))
● Constructor
execution(* android.mobile.peakgames.net.aspectjandroid.AspectActivity.new(..))
● Field Access
● Exception Handler Execution
● Class Initialization

13. Call / Execution Aspect Difference
ATM Account
debit(...)
Aspect
Call Execution
Aspect

14. AspectJ Annotations
@Aspect
@Pointcut
@Before
@After
@AfterReturning
@AfterThrowing
@Around

15. Code with sample
https://github.com/firstthumb/AspectJ-Android-Example

16. Thank You!
We are Hiring!
www.peakgames.net