package com.yxkj.springbootdemo.config;

import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;

/**
 * @description:
 * @projectName:FoundationStudy
 * @see:com.yxkj.springbootdemo.config
 * @author:zhuyang
 * @createTime:2021/10/12 22:58
 * @version:1.0 切面配置
 */
@Aspect //表示当前类是一个切面类
@Component
@Slf4j
public class AspectConfig {

    /**
     * 定义切入点，切入点为com.yxkj.springbootdemo.controller下的所有函数
     **/
    @Pointcut("execution(public * com.yxkj.springbootdemo.controller..*.*(..))")
    public void root() {
    }


    //当前方法是异常通知
    @AfterThrowing("root()")
    public void rollback() {
        log.info("当前方法是一个异常通知");
    }


    //当前方法是最终通知
    @After("root()")
    public void release() {
        log.info("当前方法是一个最终通知");
    }

    //环绕通知
    @Around("root()")
    public Object transactionAround(ProceedingJoinPoint pjp) throws Throwable {
        //定义返回值
        Object rtValue = null;
        //获取方法执行所需的参数
        Object[] args = pjp.getArgs();
        log.info("环绕通知执行方法前，传入参数" + (args.length > 0 ? args[0] : ""));
        //执行方法
        rtValue = pjp.proceed(args);
        log.info("环绕通知执行方法后，传出参数" + rtValue);
        return rtValue;
    }


    @Before("root()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        // 接收到请求，记录请求内容
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        // 记录下请求内容
        log.info("前置通知：URL : " + request.getRequestURL().toString());
        log.info("前置通知：HTTP_METHOD : " + request.getMethod());
        log.info("前置通知：IP : " + request.getRemoteAddr());
        log.info("前置通知：CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
        log.info("前置通知：传入参数 : " + Arrays.toString(joinPoint.getArgs()));

    }

    @AfterReturning(returning = "ret", pointcut = "root()")
    public void doAfterReturning(Object ret) throws Throwable {
        // 处理完请求，返回内容
        log.info("后置通知：返回参数 : " + ret);
    }

}