Dummy Wallet app with deposit\withdraw\balance methods.

Prerequisites: docker

Run: ./gradlew :app:bootRun

CLI test harness to wallet

Run: ./gradlew :cli:bootRun --args '1 1 1'

where args:

• number of concurrent users emulated
• number of concurrent requests a user will make
• number of rounds each thread is executing

Assuming that concurrent access to the account is not common case, server relies on the optimistic locking for solving this problem: stale_state message will be returned to a client.

It's up to client how to deal with it. CLI-harness in this project will retry operations on stale_state result.

ghz command line benchmarking utility was used for performance testing. Example configs may be found in ghz-config folder.

Run: ghz-config> ./ghz --config deposit.json

Results on dev machine:

• balance request ~2000 RPS
• deposit\withdraw request ~700 RPS