3 ms·

You would write Mutex<HashMap<CustomerID, Account>> Instead of HashMap<CustomerID, Mutex<Account>> Using a singleton is kind of overkill. But in th

by duped 2y ago

You would write Mutex<HashMap<CustomerID, Account>> Instead of HashMap<CustomerID, Mutex<Account>> Using a singleton is kind of overkill. But in the real world you'd probably use a transactional database for this (there are a few in memory options) with retries.