Tip. loading time알아내기

https://www.techiedelight.com/ko/atomicinteger-class-java/

Java의 AtomicInteger 클래스

package com.company.design.aop;

import com.company.design.proxy.Html;
import com.company.design.proxy.iBrowser;

public class AopBrowser implements iBrowser {

   ~~~~
    private Runnable before;         <<<<         <<<<
    private Runnable after;         <<<<         <<<<

    public AopBrowser(String url, Runnable before, Runnable after){
        this.url = url;
        this.before = before;         <<<<         <<<<         <<<<
        this.after = after;         <<<<         <<<<
    }

    @Override
    public Html show() {

        before.run();         <<<<         <<<< run했을때 뭐할지 구현은 실구현시 람다식으로
        if(html == null){
            ~~

            try {
                Thread.sleep(1500); >> 이건 시간너무빠를거같아서 일부러 늘리기용
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }

        after.run();         <<<<         <<<<
        System.out.println("AopBrowser html cache : " + url);
        return html;
    }
}

import com.company.design.aop.AopBrowser;
import com.company.design.proxy.BrowserProxy;
import com.company.design.proxy.iBrowser;

import java.util.concurrent.atomic.AtomicLong;

public class Main {
    public static void main(String[] args) {

        //시간체크 동시성문제로 Atomic을 쓴다함
        AtomicLong start = new AtomicLong();         <<<<         <<<<
        AtomicLong end = new AtomicLong();         <<<<         <<<<

        iBrowser aopBrowser = new AopBrowser("www.naver.com",
                ()-> {                                               <<<< 람다식으로 구현함
                    System.out.println("before");
                    start.set(System.currentTimeMillis());         <<<<         <<<<
                },
                ()->{
                    long now = System.currentTimeMillis();
                    end.set(now - start.get());         <<<<         <<<<
                }
            );
        aopBrowser.show();
        System.out.println("loading time: " + end.get());

        aopBrowser.show();
        System.out.println("loading time: " + end.get());
    }

}