Aop之StaticMethodMatcherPointcountAdvisor学习笔记

1. 编写核心类PointcutAdvisor

   @Slf4j
   @Component
   public class AopLogService extends StaticMethodMatcherPointcutAdvisor {
          
       public AopLogService() {
          
           this.setAdvice((MethodInterceptor) (methodInvocation) -> {
          
               Log logInfo = this.createLog(methodInvocation);
               log.info("info : {}", logInfo);
               //这里将日志Log保存或者通过事件机制通知，异步进行处理
               return methodInvocation.proceed();
           });
       }
       private Log createLog(MethodInvocation invocation) throws Throwable {
          
           Method method = invocation.getMethod();
           Object aThis = invocation.getThis();
           SystemLogger methodAnnotation = findAnnotation(method, SystemLogger.class);
           String description = methodAnnotation.description();
           Log logInfo = new Log();
           logInfo.setDescp(description);
           logInfo.setMethod(method.getName());
           HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
           String requestURI = request.getRequestURI();
           logInfo.setUrl(requestURI);
           return logInfo;
       }
       //matches方法来判断是否切入，true为切入，false不切入。
       @Override
       public boolean matches(Method method, Class<?> aClass) {
          
           SystemLogger annotation = findAnnotation(method, SystemLogger.class);
           return annotation != null;
       }
       private SystemLogger findAnnotation(Method method, Class<SystemLogger> systemLoggerClass) {
          
           SystemLogger annotation = method.getAnnotation(systemLoggerClass);
           return annotation ;
       }
   }
   

2. 编写注解公用日志类

   @Target(ElementType.METHOD)
   @Retention(RetentionPolicy.RUNTIME)
   @Documented
   public @interface SystemLogger {
          
       String description() default "";
   }
   @Data
   public class Log {
          
       private String descp ;
       private String method ;
       private String url ;
   }
   

3. 编写业务处理代码

   @RestController
   @RequestMapping("/student")
   public class StudentController {
          
       @GetMapping(path = "/ok")
       @SystemLogger(description = "查询学生")    //注解方法处
       public String select() {
          
           return "ok";
       }
   }
   

4. 源码学习实例 (AuthorizationAttributeSourceAdvisor)