Developing Java Applications with Spring and Spring Boot

Configuring WebSocket handlers

We've coded our CommentService to implement Spring's WebSocketHandler interface, meaning, it's ready to transmit traffic over a WebSocket. The next step is to hook this service into the machinery.

We can start by creating a Spring configuration class:

    @Configuration 
    public class WebSocketConfig { 
      ... 
    } 

This Spring configuration class is devoted to configuring WebSocket support, and is marked up with the @Configuration annotation, indicating it's a source of Spring bean definitions.

With that in place, we now come to the core piece of registering WebSocket functionality:

 @Bean HandlerMapping webSocketMapping(CommentService commentService) { Map<String, WebSocketHandler> urlMap = new HashMap<>(); urlMap.put("/topic/comments.new", ...