event-driven-architecture

Event-driven architecture decouples microservices by using message brokers like Kafka or RabbitMQ for asynchronous communication. This Skill helps you implement core patterns like transactional outbox and saga orchestration to build resilient, scalable systems.

You need the transactional outbox pattern when you must guarantee an event is published if the database transaction succeeds. It prevents data inconsistency by reliably capturing events in a database table before asynchronously publishing them to a message broker.

Saga orchestration is the best way to handle distributed transactions across microservices. This Skill guides you in implementing sagas to manage multi-step asynchronous workflows, ensuring reliable compensation and rollback if a step like payment or inventory update fails.

Yes, this Skill supports message broker integration with Kafka, RabbitMQ, and SQS/SNS. It helps you design asynchronous workflows and implement idempotency and dead-letter queues across these platforms for robust decoupled communication.

Ensure idempotency for event consumers in Kafka by implementing deduplication logic within your consumer services. This Skill covers idempotency patterns so that processing duplicate asynchronous events does not cause unintended side effects or duplicate state changes.

Use event sourcing and CQRS in an event-driven system when you need enhanced scalability and maintainability. This Skill encompasses these principles to separate read and write models, storing state transitions as a sequence of asynchronous domain events.