src/main/java/ai/giskard/learnspringwebsockets/WebSocketConfig.java

package ai.giskard.learnspringwebsockets;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.WebSocketMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;

@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {

    @Override
    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        registry.addHandler(myHandler(), "/ws");
    }

    @Bean
    public WebSocketHandler myHandler() {
        return new WebSocketHandler() {
            @Override
            public void afterConnectionEstablished(WebSocketSession session) throws Exception {
                System.out.println("afterConnectionEstablished");
            }

            @Override
            public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception {
                System.out.println("handleMessage");
            }

            @Override
            public void handleTransportError(WebSocketSession session, Throwable exception) throws Exception {
                System.out.println("handleTransportError");
            }

            @Override
            public void afterConnectionClosed(WebSocketSession session, CloseStatus closeStatus) throws Exception {
                System.out.println("afterConnectionClosed");
            }

            @Override
            public boolean supportsPartialMessages() {
                return false;
            }
        };
    }

}