what aop techology can make ?

usually , you can aop implements many functions.such as the bellow following :
1、权限控制 access control
2、日志管理  log administration
3、事务管理  transaction administration
4、缓存功能 cach administration
5、性能监测 performance monitor
6、并发控制 parallel control
7、异常控制 exception contrl

aop is the useful tool