Stripe, Inc.

Hongshan Zhou

Ji Huang

Alexander Thiemann

Peter Wang

Adam Eagle

A method for preventing race conditions in a database comprises: setting a first numerical entry and a second numerical entry in a database; receiving a first online transaction; responsive to determining a lock of the database is in progress due to a second received online transaction, suspending the first online transaction; removing the lock after the second received online transaction is completed; responsive to determining that the first entry is greater than zero, decrementing the first entry by an amount indicated in the first online transaction; responsive to determining the second entry is greater than zero, decrementing the second entry; processing the first transaction; and generating an online transaction record for the first transaction and storing the generated record in an online transaction database.

Database locking mechanism

A method comprises: setting an first entry and an second entry in a database; receiving a first online transaction; responsive to determining a lock of the database is in progress, suspending the first online transaction; updating the first entry; removing the lock; receiving a second online transaction; responsive to determining that the first field is greater than zero, decrementing the first field by an amount indicated in the second online transaction; and responsive to determining the second entry is greater than zero, decrementing the second entry.

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Hongshan Zhou