How to limit number of requests
Did you ever need to limit requests coming to your endpoints? Say, your maximum design capacity is near 10k requests/second, and you don’t want to probe your service on higher rates.
I choose to use RateLimiter - small class from Guava.
The init process aren’t so huge, just couple of lines:
RateLimiter rateLimiter = RateLimiter.create(10); // 10 requests/second
Then, just place rateLimiter in place, where you need to have limited requests:
boolean isAcquired = rateLimiter.tryAcquire();
if (!isAcquired) {
throw new NotSoFastBuddyException(...);
}