package com.mmall.concurrency.example.commonUnsafe;

import com.mmall.concurrency.annoations.NotThreadSafe;

import lombok.extern.slf4j.Slf4j;

import java.util.HashMap;

import java.util.Map;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.Semaphore;

public class HashMapExample {

    // 请求总数

    public static int clientTotal = ;

    // 同时并发执行的线程数

    public static int threadTotal = ;

    private static Map<Integer, Integer> map = new HashMap<>();

    public static void main(String[] args) throws Exception {

        ExecutorService executorService = Executors.newCachedThreadPool();

        final Semaphore semaphore = new Semaphore(threadTotal);

        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);

        for (int i = ; i < clientTotal; i++) {

            final int count = i;

            executorService.execute(() -> {

                try {

                    semaphore.acquire();

                    update(count);

                    semaphore.release();

                } catch (Exception e) {

                    log.error("exception" , e);

                }

                countDownLatch.countDown();

            });

        }

        countDownLatch.await();

        executorService.shutdown();

        System.out.println(map.size());

        log.info("size:{}" , map.size());

    }

    private static void update(int i) {

        map.put(i, i);

    }

}