Additional Notes
Why keep remote payment calls outside the lock?
Track: Java
Topic: Java Threading
Focus: Synchronized and Locks
Java: Synchronized and Locks
Answer
To avoid serializing slow I/O and destroying throughput.
Locks should protect the shortest possible shared-state mutation. Holding a lock during remote HTTP or database work turns latency into contention and blocks unrelated requests.
Locks should protect the shortest possible shared-state mutation. Holding a lock during remote HTTP or database work turns latency into contention and blocks unrelated requests.
Topics: Java Java Threading Synchronized and Locks