Event-Driven Architecture

<aside> 📚 📁 Category: Microservices

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Overview

Event-Driven Architecture uses events to trigger and communicate between decoupled services. Services publish events when state changes, and subscribers react asynchronously.

<aside> ℹ️ Why It Matters: Understanding Event-Driven Architecture is essential for building robust, scalable, and secure modern applications.

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Key Concepts

[x] Event Producers - Publish events
[x] Event Consumers - Subscribe to events
[x] Event Brokers - Kafka, RabbitMQ, AWS SNS
[x] Event Schemas - Define event structure
[x] At-Least-Once Delivery - Guarantee delivery
[x] Exactly-Once Processing - Idempotency
[x] Event Sourcing - Store events as source of truth
[x] CQRS - Separate reads and writes

Common Use Cases

<aside> 💡 Where to Apply Event-Driven Architecture

                        Real-time notifications
                        Data synchronization
                        Audit logging
                        Analytics pipelines
                        IoT data processing
                        Stock trading platforms

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Best Practices

[x] Design events with business meaning
[x] Version events for compatibility
[x] Make consumers idempotent
[x] Use dead letter queues