For Last couple of days i have been trying spring 4 websocket . But There is a problem I am using apache-tomcat-8 and this is not a maven project.
Here are my snippets
index.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib uri="http://www.springframework.org/tags" prefix="spring" %> <%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>Hello WebSocket</title> <script type="text/javascript" src="./js/sockjs-0.3.4.js"></script> <script type="text/javascript" src="./js/stomp.js"></script> <script type="text/javascript"> var stompClient = null; function setConnected(connected) { document.getElementById('connect').disabled = connected; document.getElementById('disconnect').disabled = !connected; document.getElementById('conversationDiv').style.visibility = connected ? 'visible' : 'hidden'; document.getElementById('response').innerHTML = ''; } function connect() { var socket = new SockJS("<c:url value='/hello'/>"); stompClient = Stomp.over(socket); stompClient.connect({}, function(frame) { setConnected(true); console.log('Connected: ' + frame); window.alert('Connected: ' + frame); stompClient.subscribe('/topic/greetings', function(greeting){ showGreeting(JSON.parse(greeting.body).content); }); }); } function disconnect() { if (stompClient != null) { stompClient.disconnect(); } setConnected(false); console.log("Disconnected"); } function sendName() { var name = document.getElementById('name').value; stompClient.send("/app/hello", {}, JSON.stringify({ 'name': name })); } function showGreeting(message) { var response = document.getElementById('response'); var p = document.createElement('p'); p.style.wordWrap = 'break-word'; p.appendChild(document.createTextNode(message)); response.appendChild(p); } </script> </head> <body> <noscript><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websocket relies on Javascript being enabled. Please enable Javascript and reload this page!</h2></noscript> <div> <div> <button id="connect" onclick='connect();'>Connect</button> <button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button> </div> <div id="conversationDiv"> <label>What is your name?</label><input type="text" id="name" /> <button id="sendName" onclick="sendName();">Send</button> <p id="response"></p> </div> </div> </body> </html> WebSocketConfig.xml
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:websocket="http://www.springframework.org/schema/websocket" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/websocket http://www.springframework.org/schema/websocket/spring-websocket.xsd"> <websocket:message-broker application-destination-prefix="/app"> <websocket:stomp-endpoint path="/hello"> <websocket:sockjs/> </websocket:stomp-endpoint> <websocket:simple-broker prefix="/topic"/> </websocket:message-broker> </beans> HelloMessage.java
package com.springws.test; public class HelloMessage { private String name; public String getName() { return name; } } Greeting.java
package com.springws.test; public class Greeting { private String content; public Greeting(String content) { this.content = content; } public String getContent() { return content; } } GreetingController.java
package com.springws.test; import org.springframework.messaging.handler.annotation.MessageMapping; import org.springframework.messaging.handler.annotation.SendTo; import org.springframework.stereotype.Controller; @Controller public class GreetingController { @MessageMapping("/hello") @SendTo("/topic/greetings") public Greeting greeting(HelloMessage message) throws Exception { System.out.println(message.getName()); return new Greeting("Hello, " + message.getName() + "!"); } } web.xml
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>CRUDWebAppMavenized</display-name> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/WebSocketConfig.xml</param-value> </context-param> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app> spring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <mvc:annotation-driven/> <mvc:default-servlet-handler/> <context:annotation-config /> <context:component-scan base-package="com.springws.test" /> <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="/"/> <property name="suffix" value=".jsp"/> </bean> <tx:annotation-driven /> </beans> WebSocketConfig.java
package com.springws.test; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.messaging.simp.config.MessageBrokerRegistry; import org.springframework.stereotype.Controller; import org.springframework.web.servlet.config.annotation.EnableWebMvc; import org.springframework.web.socket.config.annotation.AbstractWebSocketMessageBrokerConfigurer; import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker; import org.springframework.web.socket.config.annotation.StompEndpointRegistry; @Configuration @ComponentScan(basePackages = {"com.springws.test"}) @EnableWebSocketMessageBroker @EnableWebMvc @Controller public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer { @Override public void configureMessageBroker(MessageBrokerRegistry config) { config.enableSimpleBroker("/topic"); config.setApplicationDestinationPrefixes("/app"); } @Override public void registerStompEndpoints(StompEndpointRegistry registry) { registry.addEndpoint("/hello").withSockJS(); } } Libraries
But in browser console
its giving the following output
Opening Web Socket... stomp.js:145 Web Socket Opened... stomp.js:145 >>> CONNECT accept-version:1.1,1.0 heart-beat:10000,10000 Whoops! Lost connection to undefined why its losing connection ?
