BankEngine — Concurrent Banking Simulation

Created: (2026-01-29)
Latest update: (2026-07-22) — Real concurrency banking engine + race tests + throughput benchmark

About

In-memory banking engine with fair locks, ordered transfer locking, audit log, and tests.

What I learned

Topic	How this project taught it
Concurrency	Threads, shared state, mutual exclusion
Deadlocks	Ordered lock acquisition on transfers
Testing races	Multi-thread deposit / transfer tests
Performance	Ops/sec micro-benchmark
Systems hygiene	Audit logging, graceful dump

Quickstart

mvn -q test
mvn -q exec:java -Dexec.mainClass=com.bank.Main
mvn -q exec:java -Dexec.mainClass=com.bank.Benchmark -Dexec.args="16 20000"

Author

Sankalp Sahu