利用 Redis 隊列操作的原子性實現秒殺

添加一個隊列模擬商品列表

lpush productlist 1 2 3 4 5 6 7 8 9 10
1
利用多線程模擬 30 個人搶購這 10 件商品：

package demo;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

/**
* @author qujianlei
* @date 2019年1月5日 下午2:49:11
* @description 通過Redis隊列的原子操作實現秒殺
*/
public class RedisSpike {

public static void main(String[] args) {
// redis的隊列操作是原子操作
// eg: 30個人搶10個商品
// lpush productlist 1 2 3 4 5 6 7 8 9 10 商品ID號
JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
jedisPoolConfig.setMaxIdle(10);
jedisPoolConfig.setMaxWaitMillis(10000);
jedisPoolConfig.setMaxTotal(1024);

JedisPool jedisPool = new JedisPool(jedisPoolConfig, "127.0.0.1", 6379);

ExecutorService executor = Executors.newFixedThreadPool(30);

for (int i = 0; i < 30; i++) {
executor.execute(new SpikeTask(i, jedisPool));
}

executor.shutdown();
}

}

class SpikeTask implements Runnable {

private int customerId;

private JedisPool jedisPool;

public SpikeTask (int customerId, JedisPool jedisPool) {
this.customerId = customerId;
this.jedisPool = jedisPool;
}

@Override
public void run() {

// 執行秒殺
Jedis client = jedisPool.getResource();

String productId = client.lpop("productlist");

if (productId != null && productId.length() != 0) {
System.out.println("顧客" + customerId + "搶到了" + productId + "號商品");
} else {
System.out.println("顧客" + customerId + "沒有搶到商品");
}

}
}

 

 

 

參考文章：https://blog.csdn.net/a909301740/article/details/85853414