Spring Boot Tutorial 0/110 lessons ~6 min read Lesson 57“Production-grade backends”

WebSockets

WebSockets give you persistent, bidirectional connections — the right tool for chat, live dashboards, notifications.

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Focus

2 guided sections

Practice signal

Examples included

Career prep

Foundation builder

Introduction

WebSockets give you persistent, bidirectional connections — the right tool for chat, live dashboards, notifications. Spring's STOMP-over-WebSocket abstraction layers messaging semantics on top.

Informative example

@Configuration @EnableWebSocketMessageBroker
public class WsConfig implements WebSocketMessageBrokerConfigurer {
  public void registerStompEndpoints(StompEndpointRegistry r) {
    r.addEndpoint("/ws").setAllowedOriginPatterns("*").withSockJS();
  }
  public void configureMessageBroker(MessageBrokerRegistry r) {
    r.enableSimpleBroker("/topic");      // or RabbitMQ for clusters
    r.setApplicationDestinationPrefixes("/app");
  }
}

@Controller
public class ChatController {
  @MessageMapping("/chat")          // client sends to /app/chat
  @SendTo("/topic/messages")        // server broadcasts
  public ChatMessage send(ChatMessage in) { return in; }
}

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