Decoupling Services with Event-Driven Architecture: Unlocking the Power of Microservices and Spring Boot for Scalable System Integration

Microservices architecture is essential for creating modular and scalable systems. This guide covers key patterns with examples and diagrams.

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Table of Contents

1. Database per Service
2. Shared Database
3. Saga Pattern
4. API Composition
5. CQRS (Command Query Responsibility Segregation)
6. Domain Events
7. Event Sourcing
8. Domain-Driven Design (DDD)

1. Database per Service

Each microservice has its own database, ensuring data encapsulation and independence.

• Pros: Decouples services, scales independently, and enables polyglot persistence.
• Cons: Increases complexity in managing data consistency across services.
• Best Practices: Implement data synchronization strategies or use event-based communication (e.g., using domain events) to maintain data integrity.