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Event-Driven Microservices — Kafka, Saga Pattern, and Eventual Consistency

10. 05. 2021 1 min read CORE SYSTEMSdevelopment
Event-Driven Microservices — Kafka, Saga Pattern, and Eventual Consistency

REST-based microservices have a problem: synchronous communication creates coupling and cascading failures. Event-driven architecture solves this.

Kafka as the Event Backbone

Confluent Cloud (managed Kafka) — durability, scalability, ordering within partitions, consumer groups. Self-hosted Kafka is operationally demanding.

Saga Pattern for Distributed Transactions

A sequence of local transactions with compensating transactions on failure. Order example: Order → Payment → Inventory → Confirmed (or compensation).

Eventual Consistency — A Mental Shift

The hardest part isn’t the technology — it’s the mindset. “Order is being processed” instead of instant confirmation. A different approach to UI and testing.

Event-Driven = Resilience + Decoupling

New tools, new patterns, new mindset. But the reward is a system that’s more resilient and scalable.

microserviceskafkaevent-drivensaga patterncqrs
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