[BAEL-16663] - Split or move spring-mvc-java module

spring-websockets/src/main/java/com/baeldung/sendtouser/WebSocketSendToUserConfig.java

@@ -0,0 +1,42 @@
+package com.baeldung.sendtouser;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.server.ServerHttpRequest;
+import org.springframework.http.server.ServerHttpResponse;
+import org.springframework.http.server.ServletServerHttpRequest;
+import org.springframework.messaging.simp.config.MessageBrokerRegistry;
+import org.springframework.web.socket.WebSocketHandler;
+import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
+import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
+import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;
+import org.springframework.web.socket.server.support.DefaultHandshakeHandler;
+
+import javax.servlet.http.HttpSession;
+import java.util.Map;
+
+@Configuration
+@EnableWebSocketMessageBroker
+public class WebSocketSendToUserConfig implements WebSocketMessageBrokerConfigurer {
+
+    @Override
+    public void configureMessageBroker(MessageBrokerRegistry config) {
+        config.enableSimpleBroker("/topic/", "/queue/");
+        config.setApplicationDestinationPrefixes("/app");
+    }
+
+    @Override
+    public void registerStompEndpoints(StompEndpointRegistry registry) {
+        registry.addEndpoint("/greeting").setHandshakeHandler(new DefaultHandshakeHandler() {
+
+            //Get sessionId from request and set it in Map attributes
+            public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler,
+                                             Map attributes) throws Exception {
+                if (request instanceof ServletServerHttpRequest) {
+                    ServletServerHttpRequest servletRequest = (ServletServerHttpRequest) request;
+                    HttpSession session = servletRequest.getServletRequest().getSession();
+                    attributes.put("sessionId", session.getId());
+                }
+                return true;
+            }}).withSockJS();
+    }
+}