Java 当用户连接到spring websocket时,如何向用户发送消息
我想在用户连接到SpringWebSocket时向他发送消息,我已经Java 当用户连接到spring websocket时,如何向用户发送消息,java,spring,stomp,spring-websocket,Java,Spring,Stomp,Spring Websocket,我想在用户连接到SpringWebSocket时向他发送消息,我已经 @Configuration @EnableWebSocketMessageBroker public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer { @Autowired private GenervicSerice<User> userService; @Autowired pr
@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {
@Autowired
private GenervicSerice<User> userService;
@Autowired
private SimpMessagingTemplate template;
private CurrentUser currnetUser;
@Override
public void registerStompEndpoints(StompEndpointRegistry stompEndpointRegistry) {
// TODO Auto-generated method stub
stompEndpointRegistry.addEndpoint("/ws").withSockJS();
}
@Override
public void configureMessageBroker(MessageBrokerRegistry config) {
config.enableSimpleBroker("/queue/", "/topic/", "/exchange/");
config.setApplicationDestinationPrefixes("/app");
}
@Override
public void configureClientInboundChannel(ChannelRegistration registration) {
registration.setInterceptors(myChannelInterception());
try {
updateNotificationAndBroadcast();
} catch (Exception e) {
return;
}
}
@Bean
public MyChannelInterception myChannelInterception() {
return new MyChannelInterception();
}
private void updateNotificationAndBroadcast() {
try {
template.convertAndSend("/queue/notify", "Greetings");
} catch (Exception e) {
System.out.println("Error message is " + e.getMessage() + "\n\n\n" + "Caused by " + e.getCause()
);
}
}
}
@配置
@EnableWebSocketMessageBroker
公共类WebSocketConfig扩展了AbstractWebSocketMessageBrokerConfiger{
@自动连线
专用通用服务用户服务;
@自动连线
私有SimpMessagingTemplate;
私有CurrentUser CurrentUser;
@凌驾
公共无效注册表stompendpoints(StompEndpointRegistry StompEndpointRegistry){
//TODO自动生成的方法存根
stompEndpointRegistry.addEndpoint(“/ws”).withSockJS();
}
@凌驾
public void配置MessageBroker(MessageBrokerRegistry配置){
config.enableSimpleBroker(“/queue/”、“/topic/”、“/exchange/”;
config.setApplicationDestinationPrefixes(“/app”);
}
@凌驾
公共无效配置ClientInBoundChannel(通道注册){
registration.setInterceptors(mychannelintercepton());
试一试{
updateNotificationAndBroadcast();
}捕获(例外e){
返回;
}
}
@豆子
公共MyChannelInterception MyChannelInterception(){
返回新的MyChannelInterception();
}
私有void updateNotificationAndBroadcast(){
试试{
template.convertAndSend(“/queue/notify”,“问候语”);
}捕获(例外e){
System.out.println(“错误消息为“+e.getMessage()+”\n\n\n“+”由“+e.getCause()引起”)
);
}
}
}
MyChannelInterception类是
public class ImtehanChannelInterception extends ChannelInterceptorAdapter {
private CurrentUser currnetUser;
@Override
public Message<?> preSend(Message<?> message, MessageChannel channel) {
MessageHeaders headers = message.getHeaders();
SimpMessageType type = (SimpMessageType) headers.get("simpMessageType");
String simpSessionId = (String) headers.get("simpSessionId");
currnetUser = new CurrentUser();
if (type == SimpMessageType.CONNECT) {
Principal principal = (Principal) headers.get("simpUser");
currnetUser.setCurrentUserEmail(principal.getName());
System.out.println("WsSession " + simpSessionId
+ " is connected for user " + principal.getName());
} else if (type == SimpMessageType.DISCONNECT) {
System.out.println("WsSession " + simpSessionId
+ " is disconnected");
}
return message;
}
}
公共类ImtehanChannelInterception扩展了ChannelInterceptorAdapter{
私有CurrentUser CurrentUser;
@凌驾
公共消息呈现(消息消息、消息通道){
MessageHeaders=message.getHeaders();
SimpMessageType=(SimpMessageType)headers.get(“SimpMessageType”);
String simpSessionId=(String)headers.get(“simpSessionId”);
CurrentUser=新的CurrentUser();
if(type==SimpMessageType.CONNECT){
Principal=(Principal)headers.get(“simpUser”);
currentUser.setCurrentUserEmail(principal.getName());
System.out.println(“WsSession”+simpSessionId
+已为用户“+principal.getName())连接”;
}else if(type==SimpMessageType.DISCONNECT){
System.out.println(“WsSession”+simpSessionId
+“断开连接”);
}
返回消息;
}
}
通过此操作,我可以获得有关新连接用户的信息,但
WebSocketConfig
中的方法updateNotificationAndBroadcast()
不会向新登录用户发送消息。我将创建SessionSubscribeEvent
侦听器,并在其内部使用SimpMessagingTemplate
顺便说一句,configureClientInboundChannel
只调用一次(不是针对每个连接的用户)。所以你们必须处理在拦截器内发送消息的问题
试着这样做:
@Service
public class SomeSubscribeListener {
private SimpMessagingTemplate template;
@Autowired
public SomeSubscribeListener(SimpMessagingTemplate template) {
this.template = template;
}
@EventListener
public void handleSubscribeEvent(SessionSubscribeEvent event) {
template.convertAndSendToUser(event.getUser().getName(), "/queue/notify", "GREETINGS");
}
}
我希望这会有所帮助您需要一个Websocketconfig文件:
package mx.config.ws;
@EnableScheduling
@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/chat").withSockJS()
}
@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
...
}
}
并声明另一个@Configuration文件:
package mx.config.ws;
@Configuration
public class WebSocketHandlersConfig {
@Bean
public StompConnectEvent webSocketConnectHandler() {
return new StompConnectEvent();
}
@Bean
public StompDisconnectEvent webSocketDisconnectHandler() {
return new StompDisconnectEvent();
}
}
接下来创建ApplicationListener接口的实现。您将自动拦截STOMP连接
package mx.config.ws;
public class StompConnectEvent implements ApplicationListener<SessionConnectEvent> {
@Override
public void onApplicationEvent(SessionConnectEvent event) {
StompHeaderAccessor sha = StompHeaderAccessor.wrap(event.getMessage());
System.out.println("StompConnectEvent::onApplicationEvent() sha.getSessionId(): "+sha.getSessionId()+" sha.toNativeHeaderMap():"+sha.toNativeHeaderMap());
//String company = sha.getNativeHeader("company").get(0);
//logger.debug("Connect event [sessionId: " + sha.getSessionId() +"; company: "+ company + " ]");
// HERE YOU CAN MAYBE SEND A MESSAGE
}
}
package mx.config.ws;
公共类StompConnectEvent实现ApplicationListener{
@凌驾
Application event(SessionConnect事件)上的公共无效{
StompHeaderAccessor sha=StompHeaderAccessor.wrap(event.getMessage());
System.out.println(“StompConnectEvent::onApplicationEvent()sha.getSessionId():”+sha.getSessionId()+“sha.toNativeHeaderMap():”+sha.toNativeHeaderMap());
//字符串company=sha.getNativeHeader(“company”).get(0);
//debug(“连接事件[sessionId:+sha.getSessionId()+”;“公司:+company+”]”;
//在这里你可以发个信息
}
}
查看此链接了解更多信息:请在网上提供任何例子或资源,这样做可以挽救生命。我在这个问题上花了三天时间,但无法完成工作,请在此情况下提供帮助。更新示例请在“问候语”末尾添加
)
;谢谢,这是我想要的,它提出了另一个问题,但这将是一个新问题,非常感谢。