Rishabh Rawat • 3/13/2021

Idempotency with Locks Explained with a URL Shortener

This technical article explains the concept of idempotency in web APIs and demonstrates its implementation using a locking mechanism (mutex) in a Node.js and PostgreSQL URL shortener. It details the problem of concurrent requests creating duplicate entries and provides a solution to make the service's POST method idempotent by ensuring mutually exclusive access to the critical database section.

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#Node.js #concurrency #postgres