This is the solution for highload.fun Auth Server competition

Download test data (users.jsonl, GeoLite2 database, tasks.jsonl) https://highload.fun/files/tc/authserver/data.tgz https://highload.fun/files/tc/authserver/tasks.jsonl.gz and put it to data/ subdirectory like this

➜  hl-auth git:(master) ✗ ls data
COPYRIGHT.txt     GeoLite2-City-CSV LICENSE.txt       tasks.jsonl       users.jsonl

Then run auth server in a docker container

gradle jar
docker build . -t auth
docker run --rm -p 8080:8080 -v "${PWD}/data:/storage/data" -m 8g --cpus=2 -t auth

highload.fun Auth Server competition has a limitation for 2 gigabytes of memory but Java solution is not fit at all. JVM has just so much overhead (JIT, GC, VM)

java -cp build/libs/auth-1.0.jar Tasks

This command runs all tasks from data/tasks.jsonl file on localhost:8080 server