concurrency-test

script to run concurrent requests (used apache benchmark command):

 ab -n 1 -c 1 <request_url>

api endpoints:

http://localhost:5000/buy/{productId}
http://localhost:5000/getquantity/{productId}

usefull links:

https://github.com/madelson/DistributedLock

https://www.codemag.com/article/0607081/Database-Concurrency-Conflicts-in-the-Real-World

https://redis.io/topics/distlock

https://github.com/samcook/RedLock.net

https://martin.kleppmann.com/2016/02/08/how-to-do-distributed-locking.html

http://antirez.com/news/101