SimpMessagingTemplate convertAndSendToUser () не передает сообщение клиенту

Question

Я пытаюсь настроить личный чат с использованием веб-сокетов Spring. Я пытаюсь использовать SimpMessagingTemplate.convertAndSendToUser, но он не передает сообщение пользователю. Я могу установить соединение, и моя конечная точка addActiveUser работает нормально, но SimpMessagingTemplate.convertAndSendToUser не отправляет мое сообщение клиенту.

Кто-нибудь может увидеть, что мне не хватает? вот мой код ПРИМЕЧАНИЕ: мой код клиента использует угловой 7, если это помогает

Серверная сторона pom.xml

<?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>

<groupId>com.gibsams</groupId>
<artifactId>wschatapplication</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>WSChatApplication</name>
<description>Demo project for Spring Boot</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.1.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-websocket -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-websocket</artifactId>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-test</artifactId>
        <scope>test</scope>
    </dependency>
    <!-- For Working with Json Web Tokens (JWT) -->
    <dependency>
        <groupId>io.jsonwebtoken</groupId>
        <artifactId>jjwt</artifactId>
        <version>0.9.1</version>
    </dependency>       


</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

WebSocketConfig

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/socket")
        .setAllowedOrigins("*")
        .withSockJS();
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry registry) {
        registry.setApplicationDestinationPrefixes("/app");
        registry.enableSimpleBroker("/chat", "/queue");
        registry.setUserDestinationPrefix("/user");
    }
}

ChatController

@Controller
@RequestMapping("/api/chat")
public class ChatController {

@Autowired 
private SimpMessagingTemplate simpMessagingTemplate;

@MessageMapping("/send/message")
public void sendMessage(@Payload ChatMessage chatMessage,
        SimpMessageHeaderAccessor headerAccessor
    ) throws Exception {
    simpMessagingTemplate.convertAndSendToUser(chatMessage.getRecipient(), "/queue/reply", chatMessage);

}

@MessageMapping("/send/addActiveUser")
@SendTo("/chat/")
public ChatMessage addActiveUser(@Payload ChatMessage chatMessage, 
        SimpMessageHeaderAccessor headerAccessor
        ) {
    String sender = chatMessage.getSender();
    headerAccessor.getSessionAttributes().put("username", sender);
    return chatMessage;
}
}

ChatMessage

public class ChatMessage {

private String sender;

private String recipient;

private String content;

public ChatMessage() {}

public ChatMessage(String sender, String recipient, String content) {
    this.sender = sender;
    this.recipient = recipient;
    this.content = content;
}

public String getContent() {
    return content;
}

public void setContent(String content) {
    this.content = content;
}

public String getSender() {
    return sender;
}

public void setSender(String sender) {
    this.sender = sender;
}

public String getRecipient() {
    return recipient;
}

public void setRecipient(String recipient) {
    this.recipient = recipient;
}

Клиентская сторона

chat.service

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Subject, Observable } from 'rxjs';

import { ChatMessage } from '../models/chat.message';

import * as Stomp from 'stompjs';
import * as SockJS from 'sockjs-client';
import { AlertService } from './alert.service';


@Injectable({
  providedIn: 'root'
})
export class ChatService {

  private activeUsersSubject = new Subject<any>();
  private chatMessagesSubject = new Subject<any>();

  private apiUrl: string = environment.apiUrl;
  private chatUrl: string = 'http://localhost:5000/socket';

  stompClient = null;

  activeUsers: string[] = [];
  messages: ChatMessage[] = [];

  constructor(private http: HttpClient, private alertService: AlertService) {
      this.connect();
  }

  public connect() {

    const socket = new SockJS(this.chatUrl);
    this.stompClient = Stomp.over(socket);
    const _this = this;
    _this.stompClient.connect({}, lamda => {
      this.stompClient.subscribe('/user/queue/reply', function(msg) {
        _this.onMessageRecieved(msg);
     });

     this.stompClient.subscribe('/chat/', function(msg) {
      _this.onMessageRecieved(msg);
     });
      this.setConnected(true);
      this.connectToChat();
    }, error => {
      this.alertService.error('Unable to connect to WebSocket server: ' + error);
    });

  }

  public getChatUsers(): Observable<any> {
    return this.activeUsersSubject.asObservable();
  }

  public getChatMessages(): Observable<ChatMessage[]> {
    return this.chatMessagesSubject.asObservable();
  }

    disconnect() {
      if (this.stompClient != null) {
        this.stompClient.disconnect();
      }
      this.setConnected(false);
    }

    public send(message: ChatMessage) {
      try {
        this.stompClient.send('/app/send/message', {}, JSON.stringify(message));
      } catch (error) {
        this.alertService.error(error);
      }
    }

    private async connectToChat() {

      const message: ChatMessage = <ChatMessage>({
        sender: 'Sam',
        type: 'JOIN'
      });

      try {
         this.stompClient.send('/app/send/addActiveUser', {}, JSON.stringify(message));
      } catch (error) {
        this.alertService.error(error);
      }

    }

    private onMessageRecieved(msg) {
      const message = JSON.parse(msg.body);
      if (message.type === 'CHAT') {
        this.chatMessagesSubject.next(message);
      } else if (message.type === 'JOIN') {
        console.log('JOIN message: ' + msg);
        this.activeUsersSubject.next(message.sender);
      } else if (message.type === 'LEAVE') {
        this.activeUsers.forEach( (item, index) => {
          if (item === message.sender) {
            this.activeUsers.splice(index, 1);
          }
        });
      }
    }

    private setConnected(connected: boolean) {

      if (connected) {
        console.log('Connected!');
      } else {
        console.log('Disconnected!');
      }
    }
}