How to Implement Server-Sent Events (SSE) in Spring Boot - SseEmitter / WebFlux Implementation Guide
Learn how to implement Server-Sent Events (SSE) in Spring Boot. This guide covers implementations using Spring MVC's SseEmitter and WebFlux's Flux of ServerSentEvent, automatic reconnection with EventSource and resumption via Last-Event-ID, broadcasting to multiple clients, production pitfalls such as Nginx proxy_buffering, and a real-world example of relaying LLM streaming responses.