├── src ├── main │ ├── resources │ │ ├── application.yml │ │ └── static │ │ │ ├── scripts.js │ │ │ ├── index.html │ │ │ ├── jquery.min.js │ │ │ └── bootstrap.min.css │ └── java │ │ └── example │ │ └── websocket │ │ ├── WebSocketApplication.java │ │ ├── WebSecurityConfig.java │ │ ├── RestMesssageController.java │ │ ├── WebSocketHandlersConfig.java │ │ ├── WebSocketDisconnectHandler.java │ │ ├── WebSocketService.java │ │ ├── WebSocketController.java │ │ ├── WebSocketConnectHandler.java │ │ ├── WebSocketConfig.java │ │ └── WebSocketChannelInterceptor.java └── test │ └── java │ └── example │ └── websocket │ └── WebSocketApplicationTests.java ├── broker-compose.yml ├── .gitignore ├── README.md └── pom.xml /src/main/resources/application.yml: -------------------------------------------------------------------------------- 1 | server: 2 | port: 8181 3 | 4 | broker: 5 | host: localhost 6 | port: 61616 7 | username: artemis 8 | password: artemis -------------------------------------------------------------------------------- /broker-compose.yml: -------------------------------------------------------------------------------- 1 | version: '2' 2 | services: 3 | mq: 4 | image: vromero/activemq-artemis:latest 5 | environment: 6 | - ARTEMIS_USERNAME=artemis 7 | - ARTEMIS_PASSWORD=artemis 8 | ports: 9 | - 8161:8161 10 | - 61616:61616 -------------------------------------------------------------------------------- /src/test/java/example/websocket/WebSocketApplicationTests.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | import org.junit.jupiter.api.Test; 4 | import org.springframework.boot.test.context.SpringBootTest; 5 | 6 | @SpringBootTest 7 | class WebSocketApplicationTests { 8 | 9 | @Test 10 | void contextLoads() { 11 | } 12 | 13 | } 14 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/WebSocketApplication.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | import org.springframework.boot.SpringApplication; 4 | import org.springframework.boot.autoconfigure.SpringBootApplication; 5 | 6 | @SpringBootApplication 7 | public class WebSocketApplication { 8 | 9 | public static void main(String[] args) { 10 | SpringApplication.run(WebSocketApplication.class, args); 11 | } 12 | 13 | } 14 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | target/ 2 | !.mvn/wrapper/maven-wrapper.jar 3 | !**/src/main/**/target/ 4 | !**/src/test/**/target/ 5 | 6 | ### STS ### 7 | .apt_generated 8 | .classpath 9 | .factorypath 10 | .project 11 | .settings 12 | .springBeans 13 | .sts4-cache 14 | 15 | ### IntelliJ IDEA ### 16 | .idea 17 | *.iws 18 | *.iml 19 | *.ipr 20 | 21 | ### NetBeans ### 22 | /nbproject/private/ 23 | /nbbuild/ 24 | /dist/ 25 | /nbdist/ 26 | /.nb-gradle/ 27 | build/ 28 | !**/src/main/**/build/ 29 | !**/src/test/**/build/ 30 | 31 | ### VS Code ### 32 | .vscode/ 33 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/WebSecurityConfig.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | import org.springframework.context.annotation.Configuration; 4 | import org.springframework.security.config.annotation.web.builders.HttpSecurity; 5 | import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity; 6 | import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter; 7 | 8 | @Configuration 9 | @EnableWebSecurity 10 | public class WebSecurityConfig extends WebSecurityConfigurerAdapter { 11 | 12 | @Override 13 | protected void configure(HttpSecurity http) throws Exception { 14 | http.authorizeRequests().antMatchers("/*") 15 | .permitAll() 16 | .and() 17 | .csrf().disable(); 18 | } 19 | } 20 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/RestMesssageController.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | import lombok.extern.slf4j.Slf4j; 4 | import org.springframework.beans.factory.annotation.Autowired; 5 | import org.springframework.web.bind.annotation.PathVariable; 6 | import org.springframework.web.bind.annotation.PostMapping; 7 | import org.springframework.web.bind.annotation.RequestBody; 8 | import org.springframework.web.bind.annotation.RestController; 9 | 10 | @RestController 11 | @Slf4j 12 | public class RestMesssageController { 13 | 14 | @Autowired 15 | WebSocketService service; 16 | 17 | @PostMapping(path = "/v1/{toUser}") 18 | void sendMessage(@RequestBody String message, @PathVariable String toUser) { 19 | log.info("Rest send message {} to user {}", message, toUser); 20 | service.notifyUser(toUser, message); 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/WebSocketHandlersConfig.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | import org.springframework.boot.web.servlet.server.Session; 4 | import org.springframework.context.annotation.Bean; 5 | import org.springframework.context.annotation.Configuration; 6 | import org.springframework.messaging.simp.SimpMessageSendingOperations; 7 | 8 | @Configuration 9 | public class WebSocketHandlersConfig { 10 | 11 | @Bean 12 | public WebSocketConnectHandler webSocketConnectHandler(SimpMessageSendingOperations messagingTemplate) { 13 | return new WebSocketConnectHandler<>(messagingTemplate); 14 | } 15 | 16 | @Bean 17 | public WebSocketDisconnectHandler webSocketDisconnectHandler(SimpMessageSendingOperations messagingTemplate) { 18 | return new WebSocketDisconnectHandler<>(messagingTemplate); 19 | } 20 | 21 | } 22 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/WebSocketDisconnectHandler.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | import lombok.extern.slf4j.Slf4j; 4 | import org.springframework.context.ApplicationListener; 5 | import org.springframework.messaging.simp.SimpMessageSendingOperations; 6 | import org.springframework.web.socket.messaging.SessionDisconnectEvent; 7 | 8 | import java.util.Optional; 9 | 10 | @Slf4j 11 | public class WebSocketDisconnectHandler implements ApplicationListener { 12 | 13 | public WebSocketDisconnectHandler(SimpMessageSendingOperations messagingTemplate) { 14 | super(); 15 | } 16 | 17 | @Override 18 | public void onApplicationEvent(SessionDisconnectEvent event) { 19 | Optional.ofNullable(event.getUser()).ifPresent(user -> 20 | log.info("USer {} disconnected from session id {}", user.getName(), event.getSessionId()) 21 | ); 22 | } 23 | } -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Getting Started 2 | 3 | This is an example project of how to use Spring WebSocket integrated with Message Broker Active MQ to deal with the scenario where you scale out your Microservice and keep the WebSocket communication working between different Clients connected to your backend service. 4 | 5 | ## Pre Requirements 6 | - IntelliJ IDE 7 | - Maven 8 | - JDK 11 9 | - Docker 10 | - Docker Compose 11 | 12 | ## How to Run 13 | 14 | 1. Clone the project and open it with IntelliJ 15 | 2. Navigate to the project folder and run the Active MQ Artemis by executing the command `docker-compose -f broker-compose.ym up mq` 16 | 3. Run the class `WebSocketApplication` 17 | 4. Access the Client page at http://localhost:8181 18 | 5. On IntelliJ duplicate the Runner for `WebSocketApplication` and add the VM parameter `-Dserver.port=8282` to open a new instance in other port. 19 | 20 | To see this code running watch my [YouTube video here](https://youtu.be/pj0zVBOUd58). 21 | 22 | 23 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/WebSocketService.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | import com.fasterxml.jackson.databind.ObjectMapper; 4 | import lombok.*; 5 | import org.springframework.messaging.simp.SimpMessagingTemplate; 6 | import org.springframework.stereotype.Service; 7 | 8 | @Service 9 | @RequiredArgsConstructor 10 | public class WebSocketService { 11 | 12 | private final SimpMessagingTemplate messagingTemplate; 13 | 14 | 15 | public void notifyUser(final String userId, final String message) { 16 | this.send(userId, message); 17 | } 18 | 19 | @SneakyThrows 20 | private void send(String userId, String message) { 21 | String json = (new ObjectMapper()).writeValueAsString(new WebSocketResponseMessage(message)); 22 | messagingTemplate.convertAndSendToUser(userId, "/topic/messages", json); 23 | } 24 | 25 | @Getter 26 | @Setter 27 | @AllArgsConstructor 28 | @NoArgsConstructor 29 | public static class WebSocketResponseMessage { 30 | 31 | private String content; 32 | 33 | } 34 | 35 | } 36 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/WebSocketController.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | 4 | import lombok.Getter; 5 | import lombok.RequiredArgsConstructor; 6 | import lombok.Setter; 7 | import lombok.extern.slf4j.Slf4j; 8 | import org.springframework.beans.factory.annotation.Autowired; 9 | import org.springframework.messaging.handler.annotation.DestinationVariable; 10 | import org.springframework.messaging.handler.annotation.Header; 11 | import org.springframework.messaging.handler.annotation.MessageMapping; 12 | import org.springframework.stereotype.Controller; 13 | import org.springframework.web.bind.annotation.RequestBody; 14 | 15 | import java.security.Principal; 16 | 17 | @Controller 18 | @RequiredArgsConstructor 19 | @Slf4j 20 | public class WebSocketController { 21 | 22 | @Autowired 23 | WebSocketService webSocketService; 24 | 25 | @MessageMapping("/message/{toUser}") 26 | public Boolean sendMessage( 27 | Principal principal, 28 | @Header String authKey, 29 | @DestinationVariable String toUser, 30 | @RequestBody WebSocketRequestMessage message) { 31 | log.info("Send message from user {} to user {}. Auth key {}", principal.getName(), toUser, authKey); 32 | webSocketService.notifyUser(toUser, message.getMessageContent()); 33 | return Boolean.TRUE; 34 | } 35 | 36 | 37 | @Getter 38 | @Setter 39 | public static class WebSocketRequestMessage { 40 | private String messageContent; 41 | } 42 | 43 | } 44 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/WebSocketConnectHandler.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | 4 | import lombok.extern.slf4j.Slf4j; 5 | import org.springframework.context.ApplicationListener; 6 | import org.springframework.messaging.MessageHeaders; 7 | import org.springframework.messaging.simp.SimpMessageHeaderAccessor; 8 | import org.springframework.messaging.simp.SimpMessageSendingOperations; 9 | import org.springframework.web.socket.messaging.SessionConnectEvent; 10 | 11 | import java.security.Principal; 12 | 13 | import static java.util.Optional.ofNullable; 14 | 15 | @Slf4j 16 | public class WebSocketConnectHandler implements ApplicationListener { 17 | 18 | public WebSocketConnectHandler(SimpMessageSendingOperations messagingTemplate) { 19 | super(); 20 | } 21 | 22 | @Override 23 | public void onApplicationEvent(SessionConnectEvent event) { 24 | ofNullable(readUser(event)).ifPresent(user -> log(event, user)); 25 | } 26 | 27 | private void log(SessionConnectEvent event, Principal user) { 28 | String sessionId = readSessionId(event); 29 | log.info("User {} connected to session id {}", user.getName(), sessionId); 30 | } 31 | 32 | String readSessionId(SessionConnectEvent event) { 33 | return SimpMessageHeaderAccessor.getSessionId(event.getMessage().getHeaders()); 34 | } 35 | 36 | Principal readUser(SessionConnectEvent event) { 37 | MessageHeaders headers = event.getMessage().getHeaders(); 38 | return SimpMessageHeaderAccessor.getUser(headers); 39 | } 40 | 41 | } 42 | -------------------------------------------------------------------------------- /src/main/resources/static/scripts.js: -------------------------------------------------------------------------------- 1 | var stompClient = null; 2 | 3 | $(document).ready(function() { 4 | console.log("Index page is ready"); 5 | $("#send-private").click(function() { 6 | sendPrivateMessage(); 7 | }); 8 | $("#connect").click(function() { 9 | connect(); 10 | }); 11 | }); 12 | 13 | function connect() { 14 | let apiKey = document.getElementById("key-id").value; 15 | let wsId = document.getElementById("ws-id").value; 16 | 17 | // Try to set up WebSocket connection with the handshake 18 | var socket = new SockJS('/ws-register?authKey='+apiKey); 19 | // Create a new StompClient object with the WebSocket endpoint 20 | stompClient = Stomp.over(socket); 21 | 22 | // Start the STOMP communications, provide a callback for when the CONNECT frame arrives. 23 | stompClient.connect( 24 | {'authKey':apiKey, 'ws-id':wsId }, 25 | function (frame) { 26 | showInfo(frame); 27 | console.log(frame); 28 | stompClient.subscribe('/user/topic/messages', function (message) { 29 | showMessage(JSON.parse(message.body).content); 30 | }); 31 | }, 32 | function (err){ 33 | showInfo(err); 34 | } 35 | ); 36 | } 37 | function sendPrivateMessage() { 38 | let message = document.getElementById("private-message").value; 39 | let userId = document.getElementById("user-id").value; 40 | let apiKey = document.getElementById("key-id").value; 41 | console.log("Sending private message '"+message+"' to user "+userId); 42 | 43 | stompClient.send( 44 | "/app/message/"+userId, 45 | {'authKey': apiKey }, 46 | JSON.stringify({'messageContent': message}) 47 | ); 48 | } 49 | 50 | function showMessage(message) { 51 | $("#messages").append("" + message + ""); 52 | } 53 | 54 | function showInfo(message) { 55 | $("#connected").append("" + message + ""); 56 | } 57 | 58 | 59 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/WebSocketConfig.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | import lombok.extern.slf4j.Slf4j; 4 | import org.springframework.beans.factory.annotation.Autowired; 5 | import org.springframework.beans.factory.annotation.Value; 6 | import org.springframework.context.annotation.Configuration; 7 | import org.springframework.messaging.simp.config.ChannelRegistration; 8 | import org.springframework.messaging.simp.config.MessageBrokerRegistry; 9 | import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker; 10 | import org.springframework.web.socket.config.annotation.StompEndpointRegistry; 11 | import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer; 12 | 13 | @Configuration 14 | @EnableWebSocketMessageBroker 15 | @Slf4j 16 | public class WebSocketConfig implements WebSocketMessageBrokerConfigurer { 17 | 18 | @Autowired 19 | WebSocketChannelInterceptor channelInterceptor; 20 | 21 | @Value("${broker.host}") 22 | private String brokerHost; 23 | 24 | @Value("${broker.port}") 25 | private int brokerPort; 26 | 27 | @Value("${broker.username}") 28 | private String brokerUser; 29 | 30 | @Value("${broker.password}") 31 | private String brokerPass; 32 | 33 | @Override 34 | public void registerStompEndpoints(final StompEndpointRegistry registry) { 35 | registry.addEndpoint("/ws-register") 36 | .setAllowedOriginPatterns("*") 37 | .withSockJS(); 38 | } 39 | 40 | @Override 41 | public void configureMessageBroker(final MessageBrokerRegistry registry) { 42 | // registry.enableSimpleBroker("/queue", "/topic"); 43 | 44 | registry.enableStompBrokerRelay("/queue", "/topic") 45 | .setRelayHost(brokerHost) 46 | .setRelayPort(brokerPort) 47 | .setClientLogin(brokerUser) 48 | .setClientPasscode(brokerPass) 49 | .setSystemLogin(brokerUser) 50 | .setSystemPasscode(brokerPass) 51 | .setUserDestinationBroadcast("/topic/unresolved-user") 52 | .setUserRegistryBroadcast("/topic/log-user-registry"); 53 | 54 | 55 | registry.setApplicationDestinationPrefixes("/app"); 56 | } 57 | 58 | @Override 59 | public void configureClientInboundChannel(ChannelRegistration registration) { 60 | registration.interceptors(channelInterceptor); 61 | } 62 | 63 | 64 | } 65 | -------------------------------------------------------------------------------- /src/main/resources/static/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Hello WS 6 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
18 |
19 | 20 |
21 |
22 |
23 | 24 | 25 |
26 |
27 | 28 | 29 |
30 | 31 |
32 | 33 |
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35 | 36 | 37 |
38 |
39 | 40 | 41 |
42 | 43 |
44 |
45 |
46 | 47 |
48 |
49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 |
Connection info
58 |
59 |
60 |
61 |
62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 |
Messages
71 |
72 |
73 |
74 | 75 | 76 | -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 4.0.0 5 | 6 | org.springframework.boot 7 | spring-boot-starter-parent 8 | 2.5.5 9 | 10 | 11 | example.websocket 12 | websocket 13 | 0.0.1-SNAPSHOT 14 | websocket 15 | Demo for WebSocket 16 | 17 | 11 18 | 19 | 20 | 21 | 22 | org.springframework.boot 23 | spring-boot-starter-security 24 | 25 | 26 | org.springframework.boot 27 | spring-boot-starter-web 28 | 29 | 30 | org.springframework.boot 31 | spring-boot-starter-websocket 32 | 33 | 34 | 35 | org.projectlombok 36 | lombok 37 | true 38 | 39 | 40 | org.springframework.boot 41 | spring-boot-starter-test 42 | test 43 | 44 | 45 | org.springframework.security 46 | spring-security-test 47 | test 48 | 49 | 50 | 51 | 52 | io.projectreactor.netty 53 | reactor-netty 54 | 1.0.12 55 | 56 | 57 | io.projectreactor.netty 58 | reactor-netty-core 59 | 1.0.12 60 | 61 | 62 | 63 | 64 | org.webjars 65 | bootstrap 66 | 5.1.2 67 | 68 | 69 | org.webjars 70 | jquery 71 | 3.6.0 72 | 73 | 74 | org.webjars 75 | stomp-websocket 76 | 2.3.4 77 | 78 | 79 | org.webjars 80 | sockjs-client 81 | 1.5.1 82 | 83 | 84 | org.webjars 85 | webjars-locator-core 86 | 0.48 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | org.springframework.boot 96 | spring-boot-maven-plugin 97 | 98 | 99 | 100 | org.projectlombok 101 | lombok 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | -------------------------------------------------------------------------------- /src/main/java/example/websocket/WebSocketChannelInterceptor.java: -------------------------------------------------------------------------------- 1 | package example.websocket; 2 | 3 | import lombok.extern.slf4j.Slf4j; 4 | import org.springframework.messaging.Message; 5 | import org.springframework.messaging.MessageChannel; 6 | import org.springframework.messaging.simp.stomp.StompCommand; 7 | import org.springframework.messaging.simp.stomp.StompHeaderAccessor; 8 | import org.springframework.messaging.support.ChannelInterceptor; 9 | import org.springframework.messaging.support.MessageHeaderAccessor; 10 | import org.springframework.security.authentication.AuthenticationCredentialsNotFoundException; 11 | import org.springframework.security.authentication.UsernamePasswordAuthenticationToken; 12 | import org.springframework.stereotype.Service; 13 | 14 | import java.time.LocalDateTime; 15 | 16 | import static java.util.Optional.ofNullable; 17 | 18 | @Service 19 | @Slf4j 20 | public class WebSocketChannelInterceptor implements ChannelInterceptor { 21 | static final String API_KEY_HEADER = "authKey"; 22 | static final String SESSION_KEY_HEADER = "simpSessionId"; 23 | static final String WS_ID_HEADER = "ws-id"; 24 | 25 | /** 26 | * Processes a message before sending it 27 | */ 28 | @Override 29 | public Message preSend(Message message, MessageChannel channel) { 30 | final StompHeaderAccessor accessor = readHeaderAccessor(message); 31 | 32 | if (accessor.getCommand() == StompCommand.CONNECT) { 33 | 34 | String wsId = readWebSocketIdHeader(accessor); 35 | String apiKey = readAuthKeyHeader(accessor); 36 | String sessionId = readSessionId(accessor); 37 | 38 | // authenticate the user and if that's successful add their user information to the headers. 39 | UsernamePasswordAuthenticationToken user = new UsernamePasswordAuthenticationToken(wsId, null); 40 | accessor.setUser(user); 41 | accessor.setHeader("connection-time", LocalDateTime.now().toString()); 42 | log.info("User with authKey '{}', ws-id {} session {} make a WebSocket connection and generated the user {}", apiKey, wsId, sessionId, user.toString()); 43 | 44 | } 45 | 46 | return message; 47 | 48 | } 49 | 50 | /** 51 | * Instantiate an object for retrieving the STOMP headers 52 | */ 53 | private StompHeaderAccessor readHeaderAccessor(Message message) { 54 | final StompHeaderAccessor accessor = getAccessor(message); 55 | if (accessor == null) { 56 | throw new AuthenticationCredentialsNotFoundException("Fail to read headers."); 57 | } 58 | return accessor; 59 | } 60 | 61 | private String readSessionId(StompHeaderAccessor accessor) { 62 | return ofNullable(accessor.getMessageHeaders().get(SESSION_KEY_HEADER)) 63 | .orElseThrow(() -> new AuthenticationCredentialsNotFoundException("Session header not found")).toString(); 64 | } 65 | 66 | private String readAuthKeyHeader(StompHeaderAccessor accessor) { 67 | final String authKey = accessor.getFirstNativeHeader(API_KEY_HEADER); 68 | if (authKey == null || authKey.trim().isEmpty()) 69 | throw new AuthenticationCredentialsNotFoundException("Auth Key Not Found"); 70 | return authKey; 71 | } 72 | 73 | private String readWebSocketIdHeader(StompHeaderAccessor accessor) { 74 | final String wsId = accessor.getFirstNativeHeader(WS_ID_HEADER); 75 | if (wsId == null || wsId.trim().isEmpty()) 76 | throw new AuthenticationCredentialsNotFoundException("Web Socket ID Header not found"); 77 | return wsId; 78 | } 79 | 80 | StompHeaderAccessor getAccessor(Message message) { 81 | return MessageHeaderAccessor.getAccessor(message, StompHeaderAccessor.class); 82 | } 83 | 84 | 85 | } 86 | -------------------------------------------------------------------------------- /src/main/resources/static/jquery.min.js: -------------------------------------------------------------------------------- 1 | /*! jQuery v3.1.1 | (c) jQuery Foundation | jquery.org/license */ 2 | !function(a,b){"use strict";"object"==typeof module&&"object"==typeof module.exports?module.exports=a.document?b(a,!0):function(a){if(!a.document)throw new Error("jQuery requires a window with a document");return b(a)}:b(a)}("undefined"!=typeof window?window:this,function(a,b){"use strict";var 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