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

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catalin-burcea
2019-12-27 16:44:05 +02:00
parent b63a8c2335
commit 9d77b85aed
33 changed files with 192 additions and 188 deletions
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spring-websockets/README.md
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## Spring WebSockets
This module contains articles about Spring WebSockets.
### Relevant articles
- [Intro to WebSockets with Spring](https://www.baeldung.com/websockets-spring)
- [A Quick Example of Spring Websockets’ @SendToUser Annotation](https://www.baeldung.com/spring-websockets-sendtouser)
spring-websockets/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-websockets</artifactId>
<name>spring-websockets</name>
<packaging>war</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-boot-2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-boot-2</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
</dependency>
</dependencies>
<build>
<finalName>spring-websockets</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
</project>
spring-websockets/src/main/java/com/baeldung/SpringBootApp.java
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package com.baeldung;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
@SpringBootApplication
public class SpringBootApp extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(SpringBootApp.class, args);
}
}
spring-websockets/src/main/java/com/baeldung/sendtouser/WebSocketSendToUserConfig.java
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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();
}
}
spring-websockets/src/main/java/com/baeldung/sendtouser/WebsocketSendToUserController.java
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package com.baeldung.sendtouser;
import com.google.gson.Gson;
import org.springframework.messaging.handler.annotation.MessageExceptionHandler;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.Payload;
import org.springframework.messaging.simp.annotation.SendToUser;
import org.springframework.stereotype.Controller;
import java.security.Principal;
import java.util.Map;
@Controller
public class WebsocketSendToUserController {
private Gson gson = new Gson();
@MessageMapping("/message")
@SendToUser("/queue/reply")
public String processMessageFromClient(@Payload String message, Principal principal) throws Exception {
return gson.fromJson(message, Map.class).get("name").toString();
}
@MessageExceptionHandler
@SendToUser("/queue/errors")
public String handleException(Throwable exception) {
return exception.getMessage();
}
}
spring-websockets/src/main/java/com/baeldung/websockets/ChatController.java
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package com.baeldung.websockets;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;
import java.text.SimpleDateFormat;
import java.util.Date;
@Controller
public class ChatController {
@MessageMapping("/chat")
@SendTo("/topic/messages")
public OutputMessage send(final Message message) throws Exception {
final String time = new SimpleDateFormat("HH:mm").format(new Date());
return new OutputMessage(message.getFrom(), message.getText(), time);
}
}
spring-websockets/src/main/java/com/baeldung/websockets/Message.java
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package com.baeldung.websockets;
public class Message {
private String from;
private String text;
public String getText() {
return text;
}
public String getFrom() {
return from;
}
}
spring-websockets/src/main/java/com/baeldung/websockets/OutputMessage.java
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package com.baeldung.websockets;
public class OutputMessage {
private String from;
private String text;
private String time;
public OutputMessage(final String from, final String text, final String time) {
this.from = from;
this.text = text;
this.time = time;
}
public String getText() {
return text;
}
public String getTime() {
return time;
}
public String getFrom() {
return from;
}
}
spring-websockets/src/main/java/com/baeldung/websockets/WebSocketConfig.java
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package com.baeldung.websockets;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;
@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
@Override
public void configureMessageBroker(final MessageBrokerRegistry config) {
config.enableSimpleBroker("/topic");
config.setApplicationDestinationPrefixes("/app");
}
@Override
public void registerStompEndpoints(final StompEndpointRegistry registry) {
registry.addEndpoint("/chat");
registry.addEndpoint("/chat").withSockJS();
}
}
spring-websockets/src/main/webapp/resources/chat.html
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<html>
<head>
<title>Chat WebSocket</title>
<script src="./js/sockjs-0.3.4.js"></script>
<script 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('/spring-mvc-java/chat');
stompClient = Stomp.over(socket);
stompClient.connect({}, function(frame) {
setConnected(true);
console.log('Connected: ' + frame);
stompClient.subscribe('/topic/messages', function(messageOutput) {
showMessageOutput(JSON.parse(messageOutput.body));
});
});
}
function disconnect() {
if(stompClient != null) {
stompClient.disconnect();
}
setConnected(false);
console.log("Disconnected");
}
function sendMessage() {
var from = document.getElementById('from').value;
var text = document.getElementById('text').value;
stompClient.send("/app/chat", {}, JSON.stringify({'from':from, 'text':text}));
}
function showMessageOutput(messageOutput) {
var response = document.getElementById('response');
var p = document.createElement('p');
p.style.wordWrap = 'break-word';
p.appendChild(document.createTextNode(messageOutput.from + ": " + messageOutput.text + " (" + messageOutput.time + ")"));
response.appendChild(p);
}
</script>
</head>
<body onload="disconnect()">
<div>
<div>
<input type="text" id="from" placeholder="Choose a nickname"/>
</div>
<br />
<div>
<button id="connect" onclick="connect();">Connect</button>
<button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button>
</div>
<br />
<div id="conversationDiv">
<input type="text" id="text" placeholder="Write a message..."/>
<button id="sendMessage" onclick="sendMessage();">Send</button>
<p id="response"></p>
</div>
</div>
</body>
</html>
spring-websockets/src/main/webapp/resources/js/sockjs-0.3.4.js
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spring-websockets/src/main/webapp/resources/js/stomp.js
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spring-websockets/src/main/webapp/resources/js/webSocketSendToUserApp.js
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function connect() {
var socket = new WebSocket('ws://localhost:8080/greeting');
ws = Stomp.over(socket);
ws.connect({}, function(frame) {
ws.subscribe("/user/queue/errors", function(message) {
alert("Error " + message.body);
});
ws.subscribe("/user/queue/reply", function(message) {
alert("Message " + message.body);
});
}, function(error) {
alert("STOMP error " + error);
});
}
function disconnect() {
if (ws != null) {
ws.close();
}
setConnected(false);
console.log("Disconnected");
}