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Transactions across services · designlab

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Part 2 · Module 20

Transactions across services

Keep data consistent when one business action spans several services: the dual-write problem, two-phase commit, sagas and the transactional outbox.

0 of 4 lessons21 min

20.1Dual writes and two-phase commitUp next5m

20.2

Sagas

5m

20.3The outbox and inbox patterns5m

20.4Durable workflows6m

LabPlacing an order touches three servicesFinish “Order events for everyone” first40m

Practice what this module teaches

E-commerce Checkout HLDCoordinate orders, stock and payment with idempotent steps and compensation.Advanced55 min Two-phase Commit Coordinator HLDCoordinate atomic decisions across prepared participants with durable recovery and honest blocking semantics.Advanced60 min Durable Workflow Orchestrator HLDRecover long-running workflows with durable history, timers and idempotent activities.Advanced60 min Restaurant Order Orchestration HLDCoordinate restaurant acceptance, preparation and courier pickup with explicit cancellation boundaries.Advanced55 min