spring-boot-event-driven-patterns

SKILL.md

Event-Driven Architecture patterns for Spring Boot using domain events, transactional listeners, and Kafka messaging.

Covers domain event design, ApplicationEventPublisher integration, and @TransactionalEventListener configuration for local event handling with AFTER_COMMIT phase guarantees

Supports distributed messaging via Kafka and Spring Cloud Stream for inter-service communication with functional consumer beans

Implements the transactional outbox pattern for reliable event publishing and includes retry logic with dead-letter queue handling

Provides testing strategies using Testcontainers for Kafka integration and includes best practices for event naming, idempotent handlers, and correlation ID tracing

Spring Boot Event-Driven Patterns

Overview

Implement Event-Driven Architecture (EDA) patterns in Spring Boot 3.x using domain events, ApplicationEventPublisher, @TransactionalEventListener, and distributed messaging with Kafka and Spring Cloud Stream.

When to Use

Implementing event-driven microservices with Kafka messaging

Publishing domain events from aggregate roots in DDD architectures

Setting up transactional event listeners that fire after database commits

Adding async messaging with producers and consumers via Spring Kafka

Ensuring reliable event delivery using the transactional outbox pattern

Replacing synchronous calls with event-based communication between services

Quick Reference