SeckillSystem

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Java 秒杀方案设计

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# SeckillSystem
Java 秒杀设计方案

## 具体内容
对高并发高负载情形下的应用场景进行分析，以高效地处理资源竞争为目的，设计一个秒杀与抢购模型。 本项目提供了四种解决方案来比较系统的性能：  
1.利用MySQL的update行锁实现悲观锁。  
2.MySQL加字段version实现乐观锁。  
3.使用Redis作为原子计数器（watch事务+decr操作），RabbitMQ作为消息队列记录用户抢购行为，MySQL做异步存储。   
4.基于AtomicInteger的CAS机制

## 压测图片  
![origin](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/origin.png)
![config](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/origin.png)
***

## 实验结果
### MySQL悲观锁
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/pessLockInMySQL/result_1.png)
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/pessLockInMySQL/result_2.png)
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/pessLockInMySQL/result_3.png)
***

### MySQL乐观锁
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/posiLockInMySQL/result_1.png)
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/posiLockInMySQL/result_2.png)
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/posiLockInMySQL/result_3.png)
***
### AtomicInteger实现CAS
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/atomicInteger/result_1.png)
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/atomicInteger/result_2.png)
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/atomicInteger/result_3.png)
***
### Redis的watch监控
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/posiLockInRedis/result_1.png)
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/posiLockInRedis/result_2.png)
![](https://github.com/GoldenLiang/SeckillSystem/blob/master/pics/posiLockInRedis/result_3.png)
***

SeckillSystem

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