This paper mainly uses springboot, Realize a single version of seckill demo, Through stand-alone version , Can have a certain understanding of basic concurrent seckill knowledge .

First, provide seckill service implementation class :
/** * spring Annotation added to implementation class */ @Service @Transactional public class OrderServiceImpl
implements OrderService { @Autowired private StockMapper stockMapper;
@Autowired private StockOrderMapper orderMapper; @Autowired private
StringRedisTemplate redisTemplate; // Method synchronized modification , Pessimistic lock added to stand-alone application
// be careful , And @Transactional Used together yes , Will not take effect , If you want to use it, use it where the method is called synchronized Code block
// reason :Transactional Transaction started before lock , A wide range of business , When a thread lock is released , But the business hasn't been committed yet , The next thread is , Commit last transaction together
// Generally not recommended , Threads will be used individually , Reduce efficiency , And don't add in business code synchronized @Override public int
kill(Integer id) { // join redis Cache time limited rush , Even if the token is obtained, it cannot be snapped up if it is not within the active time // check redis Is China seckill finished if
(!redisTemplate.hasKey("kill"+id)) { throw new
RuntimeException(" The current rush to buy is over !"); } // Verify inventory StockDO stockDO = checkStock(id);
// Deduct inventory updateStock(stockDO); // Create order

©2019-2020 Toolsou All rights reserved,
Redis Underlying data structure A person who dissuades others from learning computer , Are not good people win10 System computer C Where's the disc ,c disc users where? (win10c Disk not found users) Freshman c Language student management system ( lower ) hospital WIFI Which family is strong ? utilize Python Script unlimited spoof girlfriend computer C language program design —— Student management system Byte runout - Test development practice - One side cool meridian python Run code at specified time 5 Best style Linux Server system recommendation Anti anxiety life after naked resignation , I believe everything will have the best arrangement