在Java中使用Socket IO发送推送通知

我正在开发一个Spring引导应用程序,通过SocketIO服务器实现与客户机通信。我的目的是在一个特定的函数中从服务器向客户机发送一个推送通知。我如何使之成为可能?我需要在单独的服务类中触发发送事件。

Socket IO实现类

@Configuration
public class Socket {
    @Value("${socket.io.ip}")
    private String hostIP;

    @Value("${socket.io.port}")
    private int hostPort;

    @Bean
    public void setupSocketServer() {
        Configuration config = new Configuration();
        config.setHostname(hostIP);
        config.setPort(hostPort);
        SocketIOServer socketServer = new SocketIOServer(config);
        socketServer.addEventListener("chat", ChatObject.class, new DataListener<ChatObject>() {
            @Override
            public void onData(final SocketIOClient client, ChatObject data, final AckRequest ackRequest) {

                // check is ack requested by client,
                // but it's not required check
                if (ackRequest.isAckRequested()) {
                    // send ack response with data to client
                    ackRequest.sendAckData("client message was delivered to server!", "yeah!");
                }


                // send message back to client with ack callback WITH data
                ChatObject ackChatObjectData = new ChatObject(data.getUserName(), "message with ack data");
                client.sendEvent("chatResponse1", new AckCallback<String>(String.class) {
                    @Override
                    public void onSuccess(String result) {
                        System.out.println("ack from client: " + client.getSessionId() + " data: " + result);
                    }
                }, ackChatObjectData);
            }
        });

        socketServer.start();
    }
}

服务等级

class userService{
 void sendnotification(msg){
 // need to  call sendEvent function here
}

}