websocket

MainController.java

@RestController
public class MainController {
    @Autowired
    private WebSocket webSocket;
    @GetMapping("/testWebSocket")
    public String testWebSocket() {
        webSocket.sendMessage("有新的订单!");
        return "ok";
    }
}

WebSocket.java

@Component
@ServerEndpoint("/webSocket")
@Slf4j
public class WebSocket {
    private Session session;
    private static CopyOnWriteArraySet<WebSocket> webSocketSet = new CopyOnWriteArraySet<>();
    @OnOpen
    public void onOpen(Session session) {
        this.session = session;
        webSocketSet.add(this);
        log.info("[webSocket消息] 有新的连接, 总数: {}", webSocketSet.size());
    }
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);
        log.info("[webSocket消息] 连接断开, 总数: {}", webSocketSet.size());
    }
    @OnMessage
    public void onMessage(String message) {
        log.info("[webSocket消息] 收到客户端发来的消息: {}", message);
    }
    public void sendMessage(String message) {
        for (WebSocket webSocket: webSocketSet) {
            log.info("[webSocket消息] 广播消息, message={}", message);
            try {
                webSocket.session.getBasicRemote().sendText(message);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}