Tag: idempotency
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The Student Learning Flow in an LMS: Catalog, Enrollment, Course Player & Auto-Graded Assessments (Part 13)
Build an LMS student learning flow: a published-course catalog, idempotent enrolment, a lesson player with progress tracking, auto-graded quizzes and certificates.
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Payments, Billing & Subscriptions for an LMS: Idempotent Webhooks, Entitlements & Reconciliation (Part 7)
Build the payments layer of an LMS: pricing and the billing data model, a subscription state machine, idempotent Stripe webhooks + reconciliation,…
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Learning Analytics at Scale: Events, Streaming & the Transactional Outbox (Part 5)
Build a reliable LMS event backbone: the transactional outbox that ends dual-write data loss, at-least-once delivery with idempotent consumers, partitioned ordering, and…
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Assessments & Real-Time at Scale: Auto-Grading, Live Classes & WebSockets (Part 4)
Build an LMS assessment + real-time tier: a deterministic auto-grading engine, exactly-once submission, and WebSocket fan-out that survives a 50,000-person live class.