first successful ws impl

src/main/java/me/imsonmia/epqapi/EpqapiApplication.java

@@ -1,13 +1,16 @@
 package me.imsonmia.epqapi;
-
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
-public class EpqapiApplication {
+public class EpqapiApplication extends Thread {
-
+	private static Logger logger = LoggerFactory.getLogger(EpqapiApplication.class);
 	public static void main(String[] args) {
+		logger.info("Main Spring Boot process running in thread!");
 		SpringApplication.run(EpqapiApplication.class, args);
 	}
+	
 
 }

src/main/java/me/imsonmia/epqapi/config/WebSocketConfig.java

@@ -0,0 +1,21 @@
+package me.imsonmia.epqapi.config;
+
+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(MessageBrokerRegistry registry) {
+        registry.enableSimpleBroker("/sub");
+        registry.setApplicationDestinationPrefixes("/app");   
+    }
+    @Override
+    public void registerStompEndpoints(StompEndpointRegistry registry) {
+        registry.addEndpoint("/ws").setAllowedOrigins("*");
+    }
+}

src/main/java/me/imsonmia/epqapi/controller/ChatMessageController.java

@@ -1,19 +1,21 @@
 package me.imsonmia.epqapi.controller;
 
-import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.messaging.handler.annotation.MessageMapping;
-import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.messaging.handler.annotation.SendTo;
-import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.RestController;
 
-import me.imsonmia.epqapi.model.ChatMessage;
+import me.imsonmia.epqapi.model.Message;
-import me.imsonmia.epqapi.repository.ChatMessageRepository;
 
-@RestController
+@Controller
-@RequestMapping("/api/v1")
+// @RequestMapping("/api/v1")
 public class ChatMessageController {
-    private ChatMessageRepository chatMessageRepository;
+    @MessageMapping("/chat")
-    @GetMapping("/msg/{id}")
+    @SendTo("/sub/chat")
-    public ChatMessage getMessageById(@PathVariable(value = "id") Long id) {
+    public Message messageHandler(Message message) throws Exception {
-        return chatMessageRepository.findById(id).get();
+        return message;
     }
+    // @GetMapping("/msg/{id}")
+    // public ChatMessage getMessageById(@PathVariable(value = "id") Long id) {
+    //     return chatMessageRepository.findById(id).get();
+    // }
 }

src/main/java/me/imsonmia/epqapi/controller/TextMessage.java

@@ -0,0 +1,17 @@
+package me.imsonmia.epqapi.controller;
+
+public class TextMessage {
+    private String text;
+    public TextMessage() {
+        
+    }
+    public TextMessage(String text) {
+        this.text = text;
+    }
+    public String getText() {
+        return text;
+    }
+    public void setText(String text) {
+        this.text = text;
+    }
+}

src/main/java/me/imsonmia/epqapi/messaging/MessageDecoder.java

@@ -1,27 +0,0 @@
-package me.imsonmia.epqapi.messaging;
-
-import com.google.gson.Gson;
-
-import jakarta.websocket.DecodeException;
-import jakarta.websocket.Decoder;
-import jakarta.websocket.EndpointConfig;
-
-public class MessageDecoder implements Decoder.Text<Message> {
-    private static Gson gson = new Gson();
-    @Override
-    public Message decode(String message) throws DecodeException {
-        return gson.fromJson(message, Message.class);
-    }
-    @Override
-    public void destroy() {
-        Text.super.destroy();
-    }
-    @Override
-    public void init(EndpointConfig endpointConfig) {
-        Text.super.init(endpointConfig);
-    }
-    @Override
-    public boolean willDecode(String s) {
-        return (s != null);
-    }
-}

src/main/java/me/imsonmia/epqapi/messaging/MessageEncoder.java

@@ -1,23 +0,0 @@
-package me.imsonmia.epqapi.messaging;
-
-import com.google.gson.Gson;
-
-import jakarta.websocket.EncodeException;
-import jakarta.websocket.Encoder;
-import jakarta.websocket.EndpointConfig;
-
-public class MessageEncoder implements Encoder.Text<Message> {
-    private static Gson gson = new Gson();
-    @Override
-    public String encode(Message message) throws EncodeException {
-        return gson.toJson(message);
-    }
-    @Override
-    public void destroy() {
-        Text.super.destroy();
-    }
-    @Override
-    public void init(EndpointConfig endpointConfig) {
-        Text.super.init(endpointConfig);
-    }
-}

src/main/java/me/imsonmia/epqapi/messaging/WebSocketHandler.java

@@ -1,71 +0,0 @@
-package me.imsonmia.epqapi.messaging;
-
-import java.io.IOException;
-import java.util.HashMap;
-import java.util.Set;
-import java.util.concurrent.CopyOnWriteArraySet;
-
-import org.slf4j.Logger;
-
-import jakarta.websocket.EncodeException;
-import jakarta.websocket.OnClose;
-import jakarta.websocket.OnMessage;
-import jakarta.websocket.OnOpen;
-import jakarta.websocket.Session;
-import jakarta.websocket.server.ServerEndpoint;
-import me.imsonmia.epqapi.model.ChatConvert;
-import me.imsonmia.epqapi.model.ChatMessage;
-import me.imsonmia.epqapi.repository.ChatMessageRepository;
-
-// https://www.baeldung.com/java-websockets
-@ServerEndpoint(
-    value = "/chat/{username}",
-    encoders = MessageEncoder.class,
-    decoders = MessageDecoder.class
-    )
-public class WebSocketHandler {
-    private Logger logger;
-    private ChatMessageRepository chatMessageRepository;
-    private Session session;
-    private Set<WebSocketHandler> chatEndpoints = new CopyOnWriteArraySet<>();
-    private HashMap<String, String> users = new HashMap<>();
-    @OnOpen
-    public void onOpen(Session session, String username) throws IOException {
-        this.session = session;
-        chatEndpoints.add(this);
-        users.put(session.getId(), username);
-        Message message = new Message();
-        message.setFrom(username);
-        message.setContent("Connected, hello world!");
-        broadcast(message);
-        ChatMessage cmessage = new ChatConvert().fromMessage(message);
-        chatMessageRepository.save(cmessage);
-    }
-    @OnMessage
-    public void onMessage(Session session, Message message) throws IOException {
-        message.setFrom(users.get(session.getId()));
-        broadcast(message);
-    }
-    @OnClose
-    public void onClose(Session session) throws IOException {
-        chatEndpoints.remove(this);
-        Message message = new Message();
-        message.setFrom(users.get(session.getId()));
-        message.setContent("Disconnected!");
-        broadcast(message);
-    }
-    public void broadcast(Message message) {
-        chatEndpoints.forEach(endpoint -> {
-            try {
-                endpoint.session.getBasicRemote().sendObject(message);
-            }
-            catch (IOException e) {
-                logger.info("Error sending message! IOException");
-                logger.error(null, e);
-            }
-            catch (EncodeException e) {
-                logger.info("Error sending message! EncodeException");
-            }  
-        });
-    }
-}

src/main/java/me/imsonmia/epqapi/model/ChatConvert.java

@@ -1,11 +1,10 @@
 package me.imsonmia.epqapi.model;
 
-import me.imsonmia.epqapi.messaging.Message;
 import me.imsonmia.epqapi.repository.UserRepository;
 
 public class ChatConvert {
     private UserRepository r;
     public ChatMessage fromMessage(Message s) {
-        return new ChatMessage(r.findByFirstName(s.getFrom()).getId(), s.getContent());
+        return new ChatMessage(r.findByUserName(s.getFrom()).getId(), s.getContent());
     }
 }

src/main/java/me/imsonmia/epqapi/model/Message.java

@@ -1,4 +1,4 @@
-package me.imsonmia.epqapi.messaging;
+package me.imsonmia.epqapi.model;
 
 public class Message {
     private String from;

src/main/java/me/imsonmia/epqapi/repository/UserRepository.java

@@ -5,5 +5,5 @@ import org.springframework.data.repository.CrudRepository;
 import me.imsonmia.epqapi.model.User;
 
 public interface UserRepository extends CrudRepository<User, Long> {
-    User findByFirstName(String userName);
+    User findByUserName(String userName);
 }

src/main/resources/application.properties

@@ -1,5 +1,6 @@
-spring.datasource.url=jdbc:mariadb://localhost:3306/test
+spring.datasource.url=jdbc:mariadb://127.0.0.1:3306/test
 spring.datasource.username=dbuser
 spring.datasource.password=dbpasswd
 spring.datasource.driver-class-name=org.mariadb.jdbc.Driver
+spring.jpa.show-sql: true
 spring.jpa.hibernate.ddl-auto=create-drop

src/main/resources/static/app.js

@@ -0,0 +1,60 @@
+const stompClient = new StompJs.Client({
+    brokerURL: 'ws://localhost:8080/ws'
+});
+
+stompClient.onConnect = (frame) => {
+    setConnected(true);
+    console.log('Connected: ' + frame);
+    stompClient.subscribe('/sub/chat', (greeting) => {
+        showGreeting(JSON.parse(greeting.body).content);
+    });
+};
+
+stompClient.onWebSocketError = (error) => {
+    console.error('Error with websocket', error);
+};
+
+stompClient.onStompError = (frame) => {
+    console.error('Broker reported error: ' + frame.headers['message']);
+    console.error('Additional details: ' + frame.body);
+};
+
+function setConnected(connected) {
+    $("#connect").prop("disabled", connected);
+    $("#disconnect").prop("disabled", !connected);
+    if (connected) {
+        $("#conversation").show();
+    }
+    else {
+        $("#conversation").hide();
+    }
+    $("#greetings").html("");
+}
+
+function connect() {
+    stompClient.activate();
+}
+
+function disconnect() {
+    stompClient.deactivate();
+    setConnected(false);
+    console.log("Disconnected");
+}
+
+function sendName() {
+    stompClient.publish({
+        destination: "/app/chat",
+        body: JSON.stringify({'text': $("#name").val()})
+    });
+}
+
+function showGreeting(message) {
+    $("#greetings").append("<tr><td>" + message + "</td></tr>");
+}
+
+$(function () {
+    $("form").on('submit', (e) => e.preventDefault());
+    $( "#connect" ).click(() => connect());
+    $( "#disconnect" ).click(() => disconnect());
+    $( "#send" ).click(() => sendName());
+});

src/main/resources/static/index.html

@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Hello WebSocket</title>
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
+    <link href="/main.css" rel="stylesheet">
+    <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/@stomp/stompjs@7.0.0/bundles/stomp.umd.min.js"></script>
+    <script src="/app.js"></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 id="main-content" class="container">
+    <div class="row">
+        <div class="col-md-6">
+            <form class="form-inline">
+                <div class="form-group">
+                    <label for="connect">WebSocket connection:</label>
+                    <button id="connect" class="btn btn-default" type="submit">Connect</button>
+                    <button id="disconnect" class="btn btn-default" type="submit" disabled="disabled">Disconnect
+                    </button>
+                </div>
+            </form>
+        </div>
+        <div class="col-md-6">
+            <form class="form-inline">
+                <div class="form-group">
+                    <label for="name">What is your name?</label>
+                    <input type="text" id="name" class="form-control" placeholder="Your name here...">
+                </div>
+                <button id="send" class="btn btn-default" type="submit">Send</button>
+            </form>
+        </div>
+    </div>
+    <div class="row">
+        <div class="col-md-12">
+            <table id="conversation" class="table table-striped">
+                <thead>
+                <tr>
+                    <th>Greetings</th>
+                </tr>
+                </thead>
+                <tbody id="greetings">
+                </tbody>
+            </table>
+        </div>
+    </div>
+</div>
+</body>
+</html>

src/test/java/me/imsonmia/epqapi/EpqapiApplicationTests.java

@@ -1,13 +0,0 @@
-package me.imsonmia.epqapi;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.context.SpringBootTest;
-
-@SpringBootTest
-class EpqapiApplicationTests {
-
-	@Test
-	void contextLoads() {
-	}
-
-}