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#event-driven architecture

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Tagged #event-driven architecture

GuideTechnology

14 min read

Event-Driven Architecture, CQRS and Event Sourcing

When services communicate by publishing facts instead of calling each other: commands versus events, event notification versus event-carried state transfer, designing and versioning events, ordering, replay, and the two patterns often paired with events: CQRS read models and event sourcing, with honest guidance on when each is worth its complexity.

GuideTechnology

16 min read

Distributed Transactions: Two-Phase Commit, the Outbox Pattern and Sagas

How to keep data consistent when one business action spans a database and a message broker, or several services. Covers the dual-write problem, the transactional outbox and change data capture, two-phase commit and why it blocks, and sagas with compensating transactions, choreography versus orchestration, pivot steps and isolation anomalies, with a runnable saga.