解决WebSocket session并发问题

modules/i3plus-core-apiservice/src/main/java/cn/estsh/i3plus/core/apiservice/websocket/MessageWebSocket.java

@@ -82,6 +82,7 @@ public class MessageWebSocket {
     public static void sendMessage(Long userId, String message){
         try {
             MessageWebSocket websocket = webSocketSet.get(userId);
+            synchronized (websocket){
                 if(websocket != null) {
                     if (message.equals("heartBit")) {
                         websocket.session.getBasicRemote().sendText(message + "=" + sendCount);
@@ -90,6 +91,7 @@ public class MessageWebSocket {
                         websocket.session.getBasicRemote().sendText(message);
                     }
                 }
+            }
         } catch (IOException e) {
             e.printStackTrace();
         }