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Spring Boot Microservices: Sync Calls, Events, and AI Integration Explained

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A technical guide explores how microservices built with Spring Boot can communicate effectively as applications grow in complexity. The article covers key tools including Spring Cloud OpenFeign, Service Discovery via Netflix Eureka, and Spring Cloud LoadBalancer for managing inter-service calls. It highlights why hardcoding service addresses is problematic and how logical service names resolve infrastructure coupling issues. The guide also addresses asynchronous processing, webhooks, and event-driven patterns to avoid blocking HTTP connections during long-running tasks. A real-world SaaS use case is presented, where an AI layer is isolated from the main backend using these architectural approaches.

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