spring-boot-saga-pattern

Distributed transactions across microservices can be handled using the Saga Pattern, which breaks a multi-service transaction into local transactions with compensating steps on failure. The pattern manages eventual consistency and state across services without requiring a distributed lock coordinator.

Choreography sagas use event-driven messaging where each service listens and reacts to events, creating a decoupled flow. Orchestration sagas use a central coordinator that directs each step, providing explicit control and easier monitoring of the transaction state across services.

Yes. Spring Boot supports both Kafka and Axon Framework for implementing sagas with event-driven messaging. You can build choreography-based sagas with Spring Cloud Stream and Kafka, or orchestration-based sagas using Axon's saga orchestrator with persistent state management.

On failure, compensating transactions execute in reverse order to undo completed steps and restore system consistency. Each service must implement idempotent and retryable operations to safely handle compensation and recovery without data corruption.

Saga state management can be handled manually with event sourcing and persistent storage, or simplified using frameworks like Axon that provide built-in saga state tracking. Spring Boot 3.x with Kafka or Axon both support automatic state persistence for tracking saga progress.