what aop techology can make ?

usually , you can aop implements many functions.such as the bellow following :
1、權限控制 access control
2、日誌管理 log administration
3、事務管理 transaction administration
4、緩存功能 cach administration
5、性能監測 performance monitor
6、併發控制 parallel control
7、異常控制 exception contrl

aop is the useful tool