idempotency
3 free lessons tagged idempotency across Business, Programming, Computer Science. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.
APIs, Webhooks, and Choosing the Right Tool
When Flow and Functions run out, you reach for the API. This lesson covers the Admin GraphQL API and its calculated-cost rate limiting, webhooks and why at-least-once delivery forces you to build for duplicates, bulk operations for large datasets, and a decision framework for choosing among all four approaches.
Queues, Async, and Microservices
Learn how message queues and pub/sub decouple services, why at-least-once delivery demands idempotent consumers, how backpressure and dead-letter queues protect the system, and when microservices are worth the complexity — with a sequenceDiagram of async order processing.
Idempotency
Why "the same request twice should produce the same result" is one of the most useful properties you can give an API, the standard patterns for implementing it (keys, dedupe tables, natural idempotency), and what goes wrong when you don't.