Demo implementation of an API rate limiter with Spring Boot and Redis

In this demo, I implemented rate limiter with sliding window algorithm.

Note that in production, if your backend sits behind a load balancer, you will need to get the remote Ip from the header:

String ipAddress = request.getHeader("X-FORWARDED-FOR");

Requirement:

• Redis
• Java 8

For Redis client, I used Lettuce, which is shipped by default with Spring.

How to run:

• Run a local Redis server. I used the Redis image from Docker.
• Then just run ./gradlew bootRun